Halyomorpha halys
(brown marmorated stink bug)

Following the accidental introduction and initial discovery of H. halys in Allentown, Pennsylvania, USA, this species has been detected in 41 states and the District of Columbia in the USA. Isolated populations also exist in Switzerland, France, Italy and Canada. Recent detections also have been reported in Germany and Liechtenstein. BMSB has become a major nuisance pest in the mid-Atlantic region and Pacific Northwest, USA, due to its overwintering behaviour of entering human-made structures in large numbers. BMSB also feeds on numerous tree fruits, vegetables, field crops, ornamental plants, and native vegetation in its native and invaded ranges. In the mid-Atlantic region, serious crop losses have been reported for apples, peaches, sweetcorn, peppers, tomatoes and row crops such as field maize and soyabeans since 2010. Crop damage has also been detected in other states recently including Oregon, Ohio, New York, North Carolina and Tennessee.

The brown marmorated stink bug, H. halys, is native to China, Japan, Korea and Taiwan (Hoebeke and Carter 2003; Lee et al., 2013a). The first USA populations were discovered in the mid-1990s in or near Allentown, Pennsylvania. In 2001, Karen Bernhardt with Penn State Cooperative Extension recognized that the insect invading homes was probably not native and sent a specimen to Richard Hoebeke at Cornell University who identified it as H. halys (Hoebeke and Carter, 2003). As of 2013, H. halys has been detected in 41 states and the District of Columbia in the USA though Colorado is still considered an unofficial find. In Delaware, Maryland, New Jersey, Pennsylvania, Virginia and West Virginia, H. halys has become a severe agricultural and nuisance pest, is considered an agricultural/nuisance pest in New York, North Carolina, Ohio and Tennessee, and a nuisance only pest in 10 additional states (Leskey and Hamilton, 2012).

Detections also have been reported in Hamilton, Ontario, Canada (Fogain and Graff, 2011), Switzerland (Wermelinger et al., 2008), Liechtenstein (Arnold, 2009), Germany (Heckmann, 2012), Italy (Pansa et al., 2013), France (Callot and Brua, 2013) and Hungary (Vétek et al., 2014).

Ecological niche modelling indicates that the area of invasion suitable for H. halys is quite extensive worldwide. H. halys could become established in northern Europe, north-eastern North America, portions of southern Australia and much of New Zealand, areas of South America (Uruguay, southern Brazil and northern Argentina) and parts of Africa (northern Angola and adjacent areas of Congo and Zambia) (Zhu et al., 2012).

Most interceptions of Halyomorpha halys during quarantine inspections or surveys have been adults, and the entry pathways for eggs and nymphs are considered to be much lower risk (Holtz and Kamminga, 2010; Duthie et al., 2012; Gariepy et al., 2013). This is because adults have more interaction with inanimate objects, making use of various structures and materials for their winter aggregations. Immature stages are not present in aggregations and are more closely associated with host plant material. It is possible that egg masses and nymphs could be transported on fresh fruits, vegetables and nursery stock. However, eggs are sensitive to temperature and may not survive well under the cool temperatures that would be typical in produce shipments. Moreover, eggs typically hatch within a few days, and transport could potentially disrupt first-instar nymphs from feeding on the egg mass after emergence, causing increased mortality. Risk for introduction is slightly higher for second- through to fifth-instar nymphs on fresh host material, but the likelihood of survival and establishment is low on produce destined for market. Transport of nursery stock is a potential mechanism for the introduction of nymphs, but strict regulations governing transport and treatment of nursery plants greatly reduce this possibility for trans-oceanic, inter-state or long distance introductions (Duthie et al., 2012).

Although interceptions of individual H. halys are more common, aggregations clearly represent the biggest risk for establishment with multiple insects of both sexes represented. Transported aggregations by people relocating from the eastern to the western USA have been the source of potential introductions into the states of California, Washington and Idaho. Introduction pathways involving adults are most likely to occur with non-plant material and are associated with adults exhibiting aggregation behaviour. These adults are sexually immature, so the introduction of isolated individuals may represent relatively little risk compared to aggregations. In exporting countries that can be regarded as major source populations of H. halys including China, Korea, Japan and the USA, aggregations begin forming in August and September (Hoebeke and Carter, 2003; Hamilton, 2009). Interceptions of H. halys tend to increase during these times in quarantine inspections, and may correlate with transport of goods stored outside during these periods in the source country (Duthie et al., 2012). Individuals are more likely to be incidentally transported by personal items such as luggage, and aggregations are more likely to occur in larger cargos. Large items that have been left in place for extended periods of time while winter aggregations of H. halys are forming have the highest risk for harbouring aggregations. Ocean-going cargo containers or packing crates appear to be one of the most common pathways of introduction, and may have been responsible for the initial introduction of H. halys into the USA in the mid 1990s (Hoebeke and Carter, 2003; Hamilton, 2009). However, H. halys has also been intercepted from ship decks and other cargo including transported machinery, furniture and cars (Holtz and Kamminga, 2010; Duthie et al., 2012).

The risk of introduction of adults on produce or other plant material is considered low or moderate, but may have been the mechanism of introduction of H. halys into Switzerland (Wermelinger et al., 2008). However, transport packaging for plant materials, particularly if stored outside, are always a potential source of introduction. Once established, continental spread is likely to follow paths of human activity, including highways and railways. Cars, tractor-trailers, recreational vehicles and moving trucks are all known pathways of introduction over land. Deliberate introductions are unlikely as H. halys is regarded as a pest under every circumstance and has no known unintended uses.

H. halys has over 100 reported host plants. It is widely considered to be an arboreal species and can frequently be found among woodlots. Such host plants are important for development as well as supporting populations, particularly during the initial spread into a region. In Canada for example, established populations of H. halys have only been recorded in the Province of Ontario. Homeowner finds have previously been identified in the City of Hamilton (Fogain and Graff, 2011) as well as the Greater Toronto Area, the City of Windsor, Newboro and Cedar Springs (Ontario) (Fraser and Gariepy, unpublished data). However, preliminary surveys confirmed an established breeding population in Hamilton, Ontario, as of July 2012 (Fraser and Gariepy, unpublished data). At present, these populations are localized along the top of the Niagara escarpment in urban/natural habitats within Hamilton, and have not yet been recorded in agricultural crops. Reproductive hosts from which H. halys eggs, nymphs and adults have been collected on in Ontario include: ash, buckthorn, catalpa, choke cherry, crabapple, dogwood, high bush cranberry, honeysuckle, lilac, linden, Manitoba maple, mulberry, rose, tree of heaven, walnut and wild grape (Gariepy et al., unpublished data).

The list of host plants in Europe contains 51 species in 32 families, including many exotic and native plants. High densities of nymphs and adults were observed on Catalpa bignonioides, Sorbus aucuparia, Cornus sanguinea, Fraxinus excelsior and Parthenocissus quinquefolia (Haye et al., unpublished data).

Multiple host plants seem to be important for development and survival of H. halys. This species can complete its development entirely on paulownia (Paulownia tomentosa), tree of heaven (Ailanthus altissima), English holly and peach. More details on host plants and host plant utilization can be found at http://www.stopbmsb.org/where-is-bmsb/host-plants/ as well as http://www.halyomorphahalys.com, Panizzi (1997), Nielsen and Hamilton (2009b) and Lee et al. (2013a).

In Asia, H. halys is an occasional outbreak pest of tree fruit (Funayama, 2002). Damage to apples and pears in the USA was first detected in Allentown, Pennsylvania, and Pittstown, New Jersey (Nielsen and Hamilton, 2009a). In orchards where H. halys is established in the USA, it quickly becomes the predominant stink bug species and, unlike native stink bugs, is a season-long pest of tree fruit (Nielsen and Hamilton, 2009a; Leskey et al., 2012a). In particular, peaches, nectarines, apples and Asian pears are heavily attacked. Feeding injury causes depressed or sunken areas that may become cat-faced as fruit develops. Late season injury causes corky spots on the fruit. Feeding may also cause fruiting structures to abort prematurely. Similar damage occurs in fruiting vegetables such as tomatoes and peppers, although frequently later in the season. Feeding can cause failure of seeds to develop in crops such as maize or soyabean. There is frequently a distinct edge effect in crop plots as H. halys an aggregated dispersion and moves between crops or woodlots. In soyabeans, this can result in a 'stay green' effect where pods fail to senesce at the edges due to H. halys feeding injury.

H. halys is a multivoltine species with up to five generations reported in southern China (Hoffman, 1931). In the mid-Atlantic region of the USA, it has one or two generations per year (Nielsen et al., 2008). In Switzerland H. halys has one generation per year (Haye et al., 2014). Non-reproductive adults overwinter and gradually emerge from overwintering sites beginning around March or April. There are few host plant resources available at this time and individuals are difficult to find in the field. Termination of diapause is probably driven by photoperiod (> 14.75 h light per d (Yanagi and Hagihara 1980)); however, there is an interaction between photoperiod and temperature, and when the daylength threshold of H. halys has been reached, sexual development begins. This results in a delay between the initial adult dispersal from diapause and reproductive maturity, as females need an additional 148 DD prior to first oviposition (Nielsen et al., 2008). It is during this time period when the first movement to crops, specifically peaches, occurs. Hardwood trees and shrubs are also important early season hosts. Adults mate, with females being polyandrous, and eggs are oviposited in clusters on the underside of leaves in groups of 28 (Kawada and Kitamura, 1992). H. halys has five nymphal instars. Development from egg to adult takes 538 DD with a minimum temperature threshold of 14.14°C and a maximum temperature threshold of 35°C (Nielsen et al., 2008). At 30°C, this takes 32-35 days. H. halys can complete development on peaches, but more than 100 host plants including tree fruits, small fruits, vegetables, ornamentals and field crops (Leskey et al., 2012a) have been recorded.

Overwintering Ecology

H. halys is well-known for being a nuisance problem, as massive numbers of adults often invade human-made structures to overwinter inside protected environments (Inkley, 2012). This behaviour is generally uncommon among Pentatomidae and has been estimated to give H. halys an increased overwintering survivorship relative to other species such as Nezara viridula (Yanagi and Hagihara, 1980). Similar to other pentatomid species, H. halys will also overwinter in natural landscapes, at least in the mid-Atlantic region (Lee and Leskey, unpublished data). Overwintering H. halys were recovered from dry crevices in dead, standing trees with thick bark, particularly oak (Quercus spp.) and locust (Robinia spp.). For those trees with overwintering H. halys present, ~6 adults/tree were recovered when 20% of the total above-ground tree area was sampled.

Associations

H. halys is a vector of Paulownia witches' broom (Yuan, 1984).

Among hymenopterous natural enemies, a number of egg parasitoids have been recorded in Asia including the generalist parasitoids Anastatus spp. (Eupelmidae) (Kawada and Kitamura, 1992; Arakawa and Namura, 2002; Hou et al., 2009) and Ooencyrtus spp. (Encyrtidae) (Kawada and Kitamura, 1992; Arakawa and Namura, 2002; Qiu 2007). A pteromalid, Acroclisoides sp., has been reported (Qiu, 2007) but it is probably a hyperparasitoid, as it has been documented from other pentatomids. More common and more host-specific are telenomines (Platygastridae) in the genus Trissolcus, including T. japonicus (= T. halyomorphae) (Kawada and Kitamura, 1992; Li and Liu, 2004; Talamas et al., 2013; Yang et al., 2009), T. flavipes (Zhang et al., 1993; Qiu, 2007; Qiu et al., 2007), T. mitsukurii and T. itoi (Arakawa and Namura, 2002). The platygastrids Gryon japonicum (Noda, 1990) and G. obesum (Buffington, unpublished data) also have been recorded. A tachinid fly, Bogosia sp., is known to attack adult H. halys (Kawada and Kitamura 1992). No nymphal parasitoids are known. The highest levels of parasitism, ranging from 63 to 85%, have been attributed to Trissolcus (Zhang et al., 1993; Qiu, 2007; Yang et al., 2009) and to Anastatus (Hou et al., 2009). Predatory arthropods reported in Asia include the pentatomid Arma chinensis, the asilid Astochia virgatipes, an anthocorid, Orius sp., and the thomisid spiders Misumena tricuspidata [Misumenops tricuspidatus] (Qiu, 2007) and Isyndus obscurus (Oda et al., 1982; Kawada and Kitamura, 1992). Several other reports mention the entomopathogen Ophiocordyceps nutans (Sasaki et al., 2012) and the intestinal virus of Plautia stali (Nakashima et al., 1998). In North America, commonly found predators of eggs, nymphs and adults have also been reported in the Anthocoridae, Geocoridae, Reduviidae, Asilidae, Chrysopidae and Melyridae. In crop and ornamental plots surveyed in Maryland, Ooencyrtus sp. and Telenomus podisi were among the most commonly found species emerging from H. halys eggs in soyabean, maize and vegetable plots, while Anastatus reduvii and A. pearsalli were commonly found on ornamental plants, but were absent or rare in maize and soyabean plots (Hooks, unpublished data). In apple orchards surveyed in Pennsylvania, T. podisi was the most common species found to attack H. halys egg masses (Biddinger, unpublished data). In Delaware, successful parasitism by Trissolcus brochymenae, T. euschisti, T. edessae and Anastatus spp. of sentinel H. halys egg masses on Paulownia was typically low  < 1-3%). Parasitism of adult H. halys by tachinid flies in Pennsylvania and Delaware averaged 1-5% (but with up to 20% in some locations) and a negligible emergence rate (Biddinger, unpublished data; Hoelmer, unpublished data). In North America, commonly found predators of eggs, nymphs and adults have also been reported in the Anthocoridae, Geocoridae, Reduviidae, Asilidae, Chrysopidae and Melyridae.

The impact of natural enemies on H. halys populations in Europe is unknown, but laboratory tests with common European pentatomid egg parasitoids, e.g. Trissolcus semistriatus, Trissolcus flavipes and Telenomus chloropus suggest that H. halys is not a suitable host (Haye and Gariepy, unpublished data).

H. halys adults can be detected throughout the active growing season using blacklight traps and baited pheromone traps and nymphal populations can be detected with pheromone traps. However, each trap has limitations. Blacklight traps are attractive from early spring through September with reduced attractiveness as adults begin seeking overwintering sites. Baited pheromone trap effectiveness depends on the lure deployed. The use of methyl (2E,4E,6Z)-decatrienoate only provides late season adult attractivess, whereas the use of (3S,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol and (3R,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol alone or in combination with methyl (2E,4E,6Z)-decatrienoate provides season-long adult attractiveness.

In cropping systems, H. halys adults and nymphs can be detected through the use of timed visual counts, whole plant inspections, beat sheets counts and sweep netting.  Timed visual counts are effective in field maize, nursery, nut, tree fruit and vegetable crops. Whole plant inspections are possible in various vegetables, field and sweetcorn by inspecting a specified number of plants per field or through the use of counts per linear foot of row. Beat sheet counts can be employed in nursery, nut and tree fruit; however, they are discouraged in nuts and tree fruit after thinning or June drop has occurred due to the potential removal of fruit. Sweep netting can be used in soyabeans but should be confined to field borders.

H. halys adults seek concealed, cool, tight and dry locations to overwinter. Because of this overwintering behaviour and need for specific microhabitats, many suitable sites can be generated by human-made materials and used by this insect as an overwintering sites such as inside cardboard boxes, other shipping containers and luggage, between wooden boards, within layers of folded tarps, and within machinery motors and vehicles. Thus, inspection for H. halys in shipments of goods from areas where it is present will require thorough visual inspections.

The superficial similarity in colour and overall appearance of H. halys to a number of other pentatomids requires that accurate identifications be based on sound morphological characters. This is particularly true for species that are found in the same habitats or utilize the same host plants, or which exhibit similar aggregation and overwintering behaviours. Rhaphigaster nebulosa is a prime example of a common European species often misidentified as H. halys because of its similar appearance, habitat preference and behaviour. Although adult H. halys present among invasive populations in Europe and North America are rather uniform in appearance, notable colour variations exist among different geographic populations in China (Hoelmer, unpublished observations of museum specimens). For North America, Hoebeke and Carter (2003) discuss possible confusion of adult H. halys with species of Brochymena in tribe Halyini and Euschistus, Holcostethus and Thyanta among members of tribe Pentatomini. For each genus, they give appropriate diagnostic characters distinguishing species from H. halys. Paiero et al. (2013) can also be used to distinguish H. halys from similar North American species. Wyniger and Kment (2010) provide an excellent dichotomous key, well illustrated with colour photographs, to distinguish H. halys from a number of native European pentatomids in the subfamily Asopine genera Arma, Picromerus, Pinthaeus and Troilus and the Pentatomine subfamily genera Carpocapsis, Dolycoris, Holcostethus, Peribalus, Pentatoma and Rhaphigaster, that are similar in appearance to H. halys. 

Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control. Pesticides should always be used in a lawful manner, consistent with the product's label.

Susceptible Crops

Soyabean. Research has revealed three H. halys characteristics that are allowing for development of better management practices in soyabean: H. halys tends to invade soyabean fields during the R4 plant growth stage (fully elongated pods) to R6 (fully developed seed) and does the most crop injury by feeding on developing seed during R5; feeding injury is similar to that caused by native stink bug species; and populations typically infest only field edges, especially those bordering maize fields, woody edges or farm structures. While still under development, tentative thresholds are 1-2 H. halys/row foot, or 5 per 15 sweep-net sweeps. Scouting field edges is recommended during R4-R6 and making field edge-only treatments if populations exceed tentative thresholds. Several insecticides provide control, and a single field edge-only treatment is effective, if applied at the right time.

Maize. H. halys populations are highest (> 3 per ear) during ear formation, the milk (R3) and soft dough (R3-R4) stages. Populations are typically highest within 12 m of field edges and decrease significantly toward the centres of fields. The highest populations are in maize fields bordering woods, followed by alfalfa, buildings and sorghum with the fewest in fields adjacent to open areas. Economic thresholds are under development.

Vegetables. Research shows that the vegetables most at risk to H. halys damage are sweetcorn, most varieties of pepper, tomato, okra, aubergine and edible beans. Plants are typically attacked in late summer when fruiting structures are present. Several foliar-applied insecticides provide effective control including pyrethroids (i.e., bifenthrin, permethrin and fenpropathrin); neonicotinoids (dinotefuran) and acephate (on peppers) (Kuhar et al., 2012 b, c, d, e). Neonicotinoids applied as a soil drench or via drip chemigation provide control for up to 14 days after treatment in vegetables such as pepper and tomato.

Tree fruit. H. halys adults can move into orchards at any time. Stone fruit, particularly peaches and nectarines are vulnerable in the early season, but the majority of fruit injury to pome fruit occurs later in the season. It takes several weeks for feeding injury on apple to appear; injury close to harvest can be expressed after harvest in cold storage. Issues with PHI (pre-harvest intervals) in mixed apple blocks severely restrict the availability of most insecticides used for control in the USA. Effective control can be achieved with applications of neonicotinoids and pyrethroids (Leskey et al., 2012b). Field and laboratory assays indicate that residual activity is limited. In general, damage in orchard crops has been mitigated by increases in insecticide applications against H. halys (Leskey et al., 2012a). This practice can disrupt IPM programmes, causing outbreaks of secondary pests such as European red mites, woolly apple aphids and San Jose scale. In general, overwintered H. halys populations are easier to kill with insecticide applications than the new generation adults present later in the season.

Biological Control

The egg parasitoid Anastatus has been mass-reared in the laboratory for experimental field trials in China (Hou et al., 2009) but is not yet widely applied. The role of indigenous natural enemies, primarily invertebrate predators and hymenopterous parasitoids, in the control of H. halys in crops, orchards and ornamentals surveyed in North America in Maryland, Delaware and Pennsylvania is highly variable. In Maryland, predators contributed ~40-70% of H. halys egg mortality found in some maize and soyabean plots, respectively. In Pennsylvania orchards, an estimated 25% of H. halys egg mortality is due to predation by Coccinellidae, particularly Harmonia axyridis, and earwigs (Forficulidae). In addition, late H. halys instars comprise the majority of nest provisioning by sand wasps (Crabronidae), up to 96% of discovered nests in orchards (Biddinger, unpublished data). Thus, species composition and attack rates of H. halys egg masses by native egg parasitoids appear to be highly variable depending on the crop or ecosystem studied. On the basis of the considerably higher rates of parasitism reported for Trissolcus spp. in Asia, these species are currently being evaluated in quarantine facilities in the USA as candidate agents for possible field releases.

Monitoring and Surveillance

Black light traps have been used to track H. halys activity in Japan (e.g., Moriya et al., 1987) and New Jersey. Relative pest pressure and spread of H. halys throughout New Jersey have been successfully tracked and documented using a network of black lights (Nielsen et al., 2013). In addition, baited black pyramid traps can be used to monitor H. halys (Leskey et al., 2012a). Khrimian et al. (2008) confirmed that the aggregation pheromone of Plautia stali, methyl (2E,4E,6Z)-decatrienoate (Sugie et al., 1996), is cross-attractive to H. halys, as reported in Asia (Tada et al., 2001a, b). However, adults are reliably attracted only late in the season, though nymphs are attracted season-long. In addition, the aggregation pheromone has been identified for H. halys and includes (3S,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol and (3R,6S,7R,10S)-10,11-epoxy-1-bisabolen-3-ol (Zhang et al., 2013). These stimuli can be used in combination with pyramid-style traps to monitor presence, abundance and seasonal activity of H. halys.

Host use patterns and preferences and related movement of H. halys need to be elucidated during the period between dispersal from overwintering sites and invasion into cultivated crops. Some wild host plant species, particularly hardwood trees, could play a key role in supporting overwintered and new generation H. halys populations. However, little is known regarding host plant selection factors, including specific visual, olfactory and host quality cues, host plant preferences including wild and cultivated throughout the season and movement patterns at landscape levels. A greater understanding of these factors will provide many opportunities to manage H. halys as their temporal movement patterns and associated at-risk crops would be known.

The impact of abiotic conditions on population dynamics of H. halys during the active growing season and the overwintering period is poorly understood. In the USA, populations have fluctuated dramatically from year to year in areas in the mid-Atlantic with well-established populations since 2010, but key factors promoting or reducing survivorship remain unknown.

Similarly, the overall impact of native natural enemies on H. halys populations in invaded regions is also poorly understood. Although there are some climatic models predicting where H. halys can become established, more precise models could be used to better predict where H. halys poses a significant risk to agriculture. Furthermore, the taxonomy of many natural enemies, particularly Trissolcus spp., is presently in a confused state; efforts are presently underway to resolve not only East Asian species, but also provide updated identification tools for native North American species.

Dispersal capacity of adults and nymphs is not well established. The impact of factors such a mating status, age and feeding state on behaviour and dispersal are not known. How adult H. halys select overwintering sites is unknown. H. halys will overwinter in human-made structures and in dead, standing trees in forests, but how H. halys selects particular locations and why the density of adults at particular locations varies greatly is unknown.

Attractants for H. halys are available including methyl (2E,4E,6Z)-decatrienoate and its aggregation pheromone. However, optimal dose, distance of response at a particular concentration, physiological status of adults and nymphs that respond to olfactory stimuli are all factors that still require further study. Furthermore, why adults are responsive to methyl (2E,4E,6Z)-decatrienoate in the late summer while nymphs respond season-long is unknown. Similarly, the distance of response to light traps is unknown.

Management tools have been developed but revolve around the use of a select number of materials applied frequently. This level of use may not be sustainable due to outbreaks of secondary pests, impacts on natural enemies and pollinators, and the increasing potential for the development of resistance. Effective tools are also not available to organic growers. The development of economic thresholds and new classes of insecticides, resistance monitoring programs, and the use of trap, barrier and repellent crops need further investigation.

23/08/13 Original text by:

Tracey C. Leskey, USDA-ARS, Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430, USA
George C. Hamilton, Department of Entomology, Rutgers University, 93 Lipman Drive, New Brunswick, NJ 08901, USA
David J. Biddinger, Department of Entomology, Penn State University, Fruit Research and Extension Center, 290 University Drive, Biglerville, PA 17307, USA
Matthew L. Buffington,Systematic Entomology Laboratory, National Museum of Natural History, Washington, D.C 20013-7012, USA
Christine Dieckhoff, USDA-ARS, Beneficial Insects Introduction Research Unit, Newark, DE 19713-3814, USA
Galen P. Dively, Department of Entomology, University of Maryland, 4112 Plant Sciences Building, College Park, MD 20742, USA
Hannah Fraser, Ontario Ministry of Agriculture and Food and Ministry of Rural Affairs, 4890 Victoria Ave North, Vineland, Ontario, Canada L0R 2E0
Tara Gariepy, Agriculture and Agri-Foods Canada, 1391 Sandford St, London, Ontario, Canada N5V 4T3
Christopher Hedstrom, Department of Horticulture, Oregon State University, 4017 Ag and Life Sciences Bldg, Corvallis, OR 97331-7304, USA
D. Ames Herbert, Department of Entomology, Virginia Tech, Tidewater AREC, 6321 Holland Road, Suffolk, VA 23437, USA
Kim A. Hoelmer, USDA-ARS, European Biological Control Laboratory, CS90013 Montferrier-sur-Lez, 34988 St. Gély du Fesc CEDEX, France
Cerruti R.R. Hooks, Department of Entomology, University of Maryland, 4112 Plant Sciences Building, College Park, MD 20742, USA
Douglas Inkley, National Wildlife Federation, 11100 Wildlife Center Drive, Reston, VA 20190, USA
Greg Krawczyk, Department of Entomology, Penn State University, Fruit Research and Extension Center, 290 University Drive, Biglerville, PA 17307, USA
Thomas P. Kuhar, Department of Entomology, Virginia Tech, 216 Price Hall, Blacksburg, VA 24061, USA
Doo-Hyung Lee, USDA-ARS, Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430 and Department of Entomology, Rutgers University, 93 Lipman Drive, New Brunswick, NJ 08901, USA
Anne L. Nielsen, Department of Entomology, Rutgers University, 93 Lipman Drive, New Brunswick, NJ 08901, USA
Douglas G. Pfeiffer, Department of Entomology, Virginia Tech, 216 Price Hall, Blacksburg, VA 24061, USA
Cesar Rodriguez-Saona, Department of Entomology, Rutgers University, 93 Lipman Drive, New Brunswick, NJ 08901, USA
Peter W. Shearer, Mid-Columbia Agricultural Research and Extension Center, Oregon State University, 3005 Experiment Station Drive, Hood River, OR 97031-9512, USA
Elijah Talamas, Systematic Entomology Laboratory, National Museum of Natural History, Washington, D.C 20013-7012, USA
Elizabeth Tomasino, Department of Food Science and Technology, Oregon State University, 100 Wiegand Hall, Corvallis, OR 97331-7304, USA
John Tooker, Department of Entomology, Penn State University, 506 ASI Bldg, University Park, PA 16802, USA
P. Dilip Venugopal, Department of Entomology, University of Maryland, 4112 Plant Sciences Building, College Park, MD 20742, USA
Joanne Whalen, Department of Entomology and Wildlife Ecology, University of Delaware, 250 Townsend Hall, Newark, DE 19716-2160, USA
Vaughn Walton, Department of Horticulture, Oregon State University, 4017 Ag and Life Sciences Bldg, Corvallis, OR 97331-7304, USA
Nik Wiman, Department of Horticulture, Oregon State University, 4017 Ag and Life Sciences Bldg, Corvallis, OR 97331-7304, USA