Phthorimaea operculella (potato tuber moth)
- Taxonomic Tree
- Distribution Table
- Risk of Introduction
- Hosts/Species Affected
- Host Plants and Other Plants Affected
- Growth Stages
- List of Symptoms/Signs
- Biology and Ecology
- Natural enemies
- Notes on Natural Enemies
- Pathway Vectors
- Plant Trade
- Detection and Inspection
- Similarities to Other Species/Conditions
- Prevention and Control
- Links to Websites
- Distribution Maps
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PicturesTop of page
IdentityTop of page
Preferred Scientific Name
- Phthorimaea operculella (Zeller 1873)
Preferred Common Name
- potato tuber moth
Other Scientific Names
- Bryotropha solanella Boisduval
- Gelechia operculella Zeller
- Gelechia tabacella Ragonot
- Gelechia terella Walker
- Gnorimoschema operculella Zeller
- Lita operculella
- Lita solanella Boisduval
- Phthorimaea solanella
- Phthorimaea terrella
- Scrobipalpa operculella
- Scrobipalpulus solanivora
- Scrobipalpus solanivora
International Common Names
- English: potato moth; potato tuber worm; stem end grub; tobacco leafminer; tobacco split worm; tobacco splitworm
- Spanish: gusano de la papa; gusano del tubérculo de la papa; minador común de la papa; minador de la hoja del tabaco; oruga barrenadora del tallo; palomilla de la patata; polilla de la papa (Arg); polilla de la patata
- French: teigne de la pomme de terre
Local Common Names
- Brazil: traca da batatinha
- Denmark: kartoffelmol
- Germany: kartoffel-motte; rübenmotte
- Israel: ash habulbusin
- Italy: tignola della patata
- Japan: zyagaimoga
- Netherlands: aardappel-knollenruspje
- Norway: potetmoll
- Sweden: potatismal
- Turkey: patetes guvesi
- PHTOOP (Phthorimaea operculella)
Taxonomic TreeTop of page
- Domain: Eukaryota
- Kingdom: Metazoa
- Phylum: Arthropoda
- Subphylum: Uniramia
- Class: Insecta
- Order: Lepidoptera
- Family: Gelechiidae
- Genus: Phthorimaea
- Species: Phthorimaea operculella
DescriptionTop of page
A small elongate gelechiid moth, measuring about 1 cm in length when at rest, coloured pale brown with darker marbling. Wingspan 15-17 mm. Head and thorax pale brown, palpi curved, ascending, terminal segment about as long as second. Antennae brown, 0.7 x wing length. Front wings pale brown with small blotches of mid brown, and hind wings pale grey. The tip of the male abdomen is spinose, and distinctive when viewed through a microscope.
Broadly oval, smooth and yellowish, iridescent.
When fully grown, P. operculella larvae are about 15 mm in length. Head dark brown; prothoracic plate sometimes pinkish; body greyish-white or pale greenish-grey. Pinacula small, dark brown or black. Anal plate brown.
Yellowish or reddish brown, eighth abdominal segment with spiracles on slightly raised, backward pointing spiracles; cremaster with a median, dorsal, thorn-like spine and eight slender hooks.
DistributionTop of page
P. operculella is a cosmopolitan pest, especially in warm temperate and tropical regions where host plants are grown. During recent years the species has been inadvertently introduced into Georgia (Markosyan, 1992) and the Ukraine and there is a threat of its spreading to neighbouring states (Sikura and Shendaraskaya, 1983). It has also been newly recorded from the Arabian peninsula (Povolny, 1986; Kroschel and Koch, 1994) and more widely in East Africa (Parker and Hunt, 1989). It was also observed in Germany (OP Karsholt, Zoologiste Museum, Copenhagen, Denmark, personal communication, 1996).
Distribution TableTop of page
The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.Last updated: 17 Feb 2021
|Continent/Country/Region||Distribution||Last Reported||Origin||First Reported||Invasive||Reference||Notes|
|Congo, Democratic Republic of the||Present|
|Congo, Republic of the||Present|
|South Africa||Present, Widespread|
|Georgia||Present, Few occurrences||1938|
|-Himachal Pradesh||Present, Widespread|
|-Meghalaya||Present, Widespread||Original citation: Lakshman Lal (1991)|
|Turkey||Present, Few occurrences|
|Albania||Absent, Unconfirmed presence record(s)|
|Austria||Absent, Unconfirmed presence record(s)|
|Belgium||Absent, Unconfirmed presence record(s)|
|Bulgaria||Present, Localized||First reported: 195*|
|Czechia||Absent, Intercepted only|
|Denmark||Absent, Intercepted only|
|Finland||Absent, Intercepted only|
|-Corsica||Absent, Unconfirmed presence record(s)|
|Germany||Absent, Intercepted only|
|Gibraltar||Absent, Unconfirmed presence record(s)|
|-Crete||Absent, Unconfirmed presence record(s)|
|Hungary||Absent, Intercepted only|
|Netherlands||Absent, Formerly present|
|Romania||Present, Few occurrences|
|Russia||Present, Few occurrences|
|-Northern Russia||Absent, Intercepted only|
|-Southern Russia||Present, Few occurrences|
|Slovakia||Absent, Intercepted only|
|-Balearic Islands||Absent, Unconfirmed presence record(s)|
|Sweden||Absent, Intercepted only|
|Switzerland||Absent, Formerly present|
|Ukraine||Present, Few occurrences|
|United Kingdom||Absent, Unconfirmed presence record(s)|
|-Channel Islands||Absent, Unconfirmed presence record(s)|
|-England||Absent, Intercepted only|
|Antigua and Barbuda||Present|
|Canada||Absent, Formerly present|
|-British Columbia||Absent, Formerly present|
|Costa Rica||Present, Widespread|
|Saint Vincent and the Grenadines||Present|
|United States||Present, Widespread|
|-District of Columbia||Present|
|-Illinois||Absent, Formerly present|
|-Indiana||Absent, Formerly present|
|-Kansas||Absent, Formerly present|
|-Massachusetts||Absent, Formerly present|
|-New York||Absent, Formerly present|
|-Wisconsin||Absent, Formerly present|
|-New South Wales||Present, Widespread|
|-South Australia||Present, Widespread|
|-Western Australia||Present, Localized|
|French Polynesia||Present, Localized|
|New Zealand||Present, Widespread|
|Papua New Guinea||Present|
|-Rio Grande do Sul||Present|
|Ecuador||Present, Few occurrences|
Risk of IntroductionTop of page
Hosts/Species AffectedTop of page
Host Plants and Other Plants AffectedTop of page
|Beta vulgaris var. saccharifera (sugarbeet)||Chenopodiaceae||Other|
|Capsicum annuum (bell pepper)||Solanaceae||Other|
|Nicotiana tabacum (tobacco)||Solanaceae||Other|
|Physalis peruviana (Cape gooseberry)||Solanaceae||Other|
|Solanum lycopersicum (tomato)||Solanaceae||Main|
|Solanum melongena (aubergine)||Solanaceae||Other|
|Solanum tuberosum (potato)||Solanaceae||Main|
Growth StagesTop of page
SymptomsTop of page
List of Symptoms/SignsTop of page
|Leaves / internal feeding|
|Leaves / wilting|
|Roots / internal feeding|
|Stems / internal feeding|
|Stems / wilt|
Biology and EcologyTop of page
The eggs are laid singly or in batches on the leaves of the host plant, or on exposed tubers near the eye buds. A total of 40-290 eggs are laid which take 3-15 days to hatch. In winter this stage can last up to 58 days, but eggs cannot tolerate low temperatures; eggs kept at 1-4°C for 4 months failed to hatch (Langford and Cory, 1932).
The larva at first bores into the petiole, or a young shoot or main leaf vein, and mines the leaf making a blotch. Later it bores into a tuber, making a long irregular gallery. On stored tubers feeding on the tubers begins immediately. The larval stage lasts 13-33 days.
Pupation normally takes place in the soil; the pupal period is 6-29 days.
Adults fly chiefly by night and are attracted to light. They live for up to 10 days. The moth breeds continuously where conditions permit; up to 13 generations a year have been recorded in India (Mukherjee, 1948). The complete life cycle ranges from 17 to 125 days. Development of all stages is greatly influenced by temperature: the maximum fecundity has been recorded at 28°C and temperatures tolerated are in the range 15-40°C.
Natural enemiesTop of page
|Natural enemy||Type||Life stages||Specificity||References||Biological control in||Biological control on|
|Agathis gibbosa||Parasite||Larvae||USA; California||potatoes|
|Agathis unicolorata||Parasite||Larvae||Australia; Bermuda; Cyprus; India; New Zealand; South Africa; St Helena; USA; Zambia; Zimbabwe||potatoes; tobacco|
|Apanteles subandinus||Parasite||Larvae||Australia; Bermuda; Chile; Cyprus; India; Madagascar; Mauritius; New Zealand; Queensland; South Africa; St Helena; Tanzania; USA; Zambia; Zimbabwe||potatoes; tobacco|
|Bacillus thuringiensis kenyae||Pathogen||Larvae|
|Bacillus thuringiensis kurstaki||Pathogen||Larvae|
|Bacillus thuringiensis thuringiensis||Pathogen||Larvae|
|Bracon gelechiae||Parasite||Larvae||Australia; Bermuda; Chile; Cyprus; Hawaii; India; Malta; New Zealand; South Africa; St Helena; Zambia; Zimbabwe||potatoes; tobacco|
|Campoplex haywardi||Parasite||Larvae||Australia; Bermuda; Cyprus; India; Madagascar; Mauritius; New Zealand; South Africa; St Helena; Tanzania; USA; Zambia||potatoes; tobacco|
|Campoplex phthorimaeae||Parasite||Bermuda; Hawaii||potatoes; tobacco|
|Chelonus kellieae||Parasite||Eggs/Larvae||India; USA||potatoes; tobacco|
|Chelonus phthorimaeae||Parasite||Eggs/Larvae||Australia; Bermuda; Chile; Hawaii; South Africa; USA; California||potatoes; tobacco|
|Copidosoma desantisi||Parasite||Eggs/Larvae||Australia; Queensland||tobacco|
|Copidosoma koehleri||Parasite||Eggs/Larvae||Australia; Bermuda; Cyprus; Greece; Hawaii; India; Italy; Japan; Kenya; Madagascar; Maharashtra; Mauritius; New Zealand; Seychelles; South Africa; St Helena; Tanzania; USA; Victoria; Zambia; Zimbabwe||potatoes; tobacco|
|Diadegma mollipla||Parasite||Bermuda; Egypt; India; Kenya; Madagascar; New Zealand; St Helena; USA||aubergines; potatoes; tobacco|
|Diadegma turcator||Parasite||Larvae||Bermuda; India; St Helena; Tanzania; Zambia||potatoes; tobacco|
|Eriborus trochanteratus||Parasite||Larvae||Cyprus; New Zealand; St Helena; Zambia||potatoes|
|Orgilus jennieae||Parasite||Larvae||India; USA; USA; California||potatoes; tobacco|
|Orgilus lepidus||Parasite||Larvae||Australia; Bermuda; California; Cyprus; India; New Zealand; Queensland; South Africa; St Helena; Tanzania; USA; Zambia||potatoes; tobacco|
|Orgilus parcus||Parasite||Larvae||Bermuda; Cyprus; India; New Zealand; St Helena; Zambia||potatoes; tobacco|
|Temelucha platensis||Parasite||New Zealand||potatoes|
Notes on Natural EnemiesTop of page
Pathway VectorsTop of page
Plant TradeTop of page
|Plant parts liable to carry the pest in trade/transport||Pest stages||Borne internally||Borne externally||Visibility of pest or symptoms|
|Bulbs/Tubers/Corms/Rhizomes||larvae; pupae||Yes||Pest or symptoms usually invisible|
|Plant parts not known to carry the pest in trade/transport|
|Fruits (inc. pods)|
|Growing medium accompanying plants|
|Stems (above ground)/Shoots/Trunks/Branches|
|True seeds (inc. grain)|
ImpactTop of page
Detection and InspectionTop of page
Similarities to Other Species/ConditionsTop of page
Prevention and ControlTop of page
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.
As infested seed tubers are the main cause of re-infestation, the use of healthy tubers will reduce levels of field infestation (Lakshman Lal, 1991).
In New Zealand the greatest tuber damage and economic losses occurred during the peak of the second potato tuber moth generation during February and March. Harvesting the crop as soon as possible during this period is recommended to restrict damage (Herman, 1999).
In Sudan, planting in the second week of November resulted in less insect damage and a significantly greater total yield compared with crops planted 3 weeks later. Greater depth of planting and more frequent hilling-up significantly lowered infestation; for example, insect damage ranged from 3.3% (planting 10 cm deep and hilling-up three times) to 16% (planting 5 cm deep and hilling-up once). Irrigation and mulching both significantly reduced insect damage. Light irrigation every 4 days and mulching with neem leaves during the last 4 weeks before harvest were the most effective treatments (Ali, 1993).
Field trials conducted in Meghalaya, India, during 1987-88 indicated that larval infestations of P. operculella on potatoes were consistently reduced when potatoes were grown with chillies (Capsicum), onions or peas compared to potato alone. Similarly, tuber damage was significantly lower in plots associated with Capsicum, onions and peas (11, 11 and 13%, respectively) compared to 27% in potato alone (Lal, 1993). In Egypt larval populations of P. operculella were significantly reduced by 80 and 91% on tomato intercropped with onion and garlic, respectively, in 1988-89, but not in 1989-90. In both seasons studied, tomato yield was 114-207% and 104-284% higher in plants intercropped with onion and garlic, respectively, compared to plots grown with tomato alone (Afifi et al., 1990).
Recent research into the possibility of genetically modified varieties is making some progress as described by Li et al. (1999) and Westedt et al. (1998), these point to future research directions rather than make practical solutions. An overview of current research into the genetic manipulation of potato for insect pest resistance carried out at the New Zealand Institute for Crop and Food Research is given by Conner et al. (1996). Work is focused on transferring the genes for the insecticidal proteins of Bacillus thuringiensis into potato in order to provide resistance.
Fifteen potato cultivars were tested for their reaction to P. operculella by Berlinger et al. (1992) using artificial infestation. There was a good correlation between the rate of larval infestation in the leaves and tubers except for cv. Frisia, which had highly susceptible leaves but a low percentage of infested tubers (8.4%). Ailsa, Escort, Blanka, King Edward and Russet Burbank were fairly resistant. Cara, Maris Piper, Desiree and Nicola were moderately resistant and Frisia, Asterix, Spunta, Pentland Squire, Diamant and Alpha were susceptible.
Biological control of P. operculella has been attempted since 1918 when Bracon gelichiae was imported into France from USA. Lloyd (1972) showed that in northern Argentina and southern Brazil P. operculella causes little damage and is heavily parasitized. Cultures of some of these parasitoids were mass-reared by the Commonwealth Institute of Biological Control (CABI Bioscience) and widely distributed. Three of these parasitoids, Apanteles subandinus, Copidosoma koehleri and Orgilus lepidus, and also B. gelechiae have become established in a number of countries, and in some of them successful biological control has been reported (Sankara and Girling, 1980). In Victoria, Australia, Horne (1990) found that the parasitoids A. subandinus and O. lepidus were the most abundant, but C. koehleri was also recorded from several sites.
Detailed analysis of data obtained through regular monitoring revealed that, in an area free from insecticides, parasitoids were a major factor in controlling P. operculella. This result differs from previously published opinions on the effect of parasitoids, and is attributed to this study's analysis of data on a generation basis. The most successful results were claimed in Zimbabwe and Zambia after the establishment of A. subandinus and O. lepidus. In Cyprus A. subandinus and other parasitoids are credited with effective control (see Sankara and Girling, 1980). C. koehleri has also been successfully used in Peru (Raman et al., 1993). However, biological control depends on the proper selection and use of insecticides, and when indiscriminate insecticide application is practised parasitoids are unable to maintain control.
Native parasitoids can also achieve significant rates of parasitism, for example, in Sardinia the ichneumonid Diadegma turcator and the braconids Bracon nigricans, B. properhebetor and a species of Apanteles were recorded as parasitoids of the pest, the first species accounting for 65.1% of the total rate of parasitism (Ortu and Floris, 1989).
The nematodes Steinernema feltiae, S. bibionis, S. carpocapsae and Heterorhabditis heliothidis were used in an experiment in Russia (Ivanova et al., 1994). Potatoes infested with larvae of P. operculella were sprayed with aqueous suspensions. The first three species resulted in 95.5, 93.4 and 93.1% mortality, respectively. Larvae of all instars, within as well as on the surface of the potatoes, were affected, and infection on larvae of the next generation appeared in 6 days.
In Italy, a leaflet was designed to give agricultural extension workers an understanding of the biological control of P. operculella using baculovirus (CIP, 1992). Instructions for low-cost virus multiplication are included. In Israel, in tomato fields adjacent to potato fields, extensive damage was caused by P. operculella and three consecutive applications of Bacillus thuringiensis at a high volume were required for control.
In Peru, Winters and Fano (1997) found that Baculovirus phthorimaea was cost effective.
In southern areas of the Ukraine, B. thuringiensis subsp. kurstaki and B. thuringiensis subsp. thuringiensis were highly effective against the pest when applied at 10-25°C. Treatment of larvae with these preparations at 9-12°C showed that they were at least as active as Dipel, another formulation of B. thuringiensis subsp. kurstaki (Baklanova et al., 1990).
In Australia, Baggen and Gurr (1998) found in field trials to investigate the effects of habitat management, parasitism rates were greatest in P. operculella larvae recovered from potato tubers close to flowering plants of dill (Anethum graveolens), borage (Borago officinalis) or coriander (Coriandrum sativum). It is concluded that there may be value in providing non-host foods to C. koehleri by deploying flowering plants in a habitat management strategy.
Prevention of attack is also assisted by the application of vegetable oils. Sharaby (1988) showed that orange peel oil reduced the fecundity of P. operculella. Reproduction was significantly reduced when either males or females were exposed to the oil vapour. The effect increased with an increase of oil dose and exposure time. Egg hatch ranged from up to 30% when the moths were exposed to 160 µl of oil for 30-120 min. A further pronounced reduction in egg production and egg viability occurred when the moths were exposed to the vapours arising from paper discs treated with a drop of oil.
Salem (1991) showed that neem seed extract was effective for control of P. operculella on potatoes in a store in Egypt. Storage loss after 6 months in potatoes treated with 100 p.p.m. neem oil was 25% (compared to 10% with carbaryl). Adults from larvae treated with neem oil were deformed.
In a field study in Egypt with potatoes, abamectin was the most effective against P. operculella followed by profenofos, Bacillus thuringiensis and granulosis virus, respectively. Tuber yields with these treatments were 14.26, 14.21, 12.58 and 12.08 t/ha, respectively, compared with the control yield of 9.04 t. Under the storage conditions, abamectin was also the most effective followed by fenitrothion, B. thuringiensis and granulosis virus (Abel-Mageed et al., 1998).
Quinalphos and diflubenzuron reduced damage caused by P. operculella, and the yield was highest in plots treated with quinalphos in India (Chandramonhan and Nanjan, 1993). The efficacy of nine insecticides against P. operculella on potatoes was tested in Maharashtra, India. Treatment with phenthoate, chlorpyrifos, fenitrothion, phoxim, permethrin, cypermethrin, deltamethrin and fenvalerate at fortnightly intervals reduced pest populations. One of these insecticides should be applied on the appearance of pests with two or three repeat applications (Raj and Trivedi, 1993).
Eleven insecticides were tested in sprays against P. operculella on potatoes in Maharashtra, India, in 1983-86. Analysis of the pooled data from three field trials indicated the efficacy of three foliar applications of quinalphos at 15-day intervals, beginning 45 days after planting (Pokharkar et al., 1991). More chemical treatment details are provided by Trivedi and Rajagopal (1992).
For protection of stored potatoes in India Sharma et al. (1998) carried out tests and it was concluded that Plantmix I is a considerable improvement to Neemrich I for preventing infestations of P. operculella. Debnath et al. (1998) found that damage to stored tubers was significantly reduced following the application of dry eucalyptus leaves, and powdered sweet flag (Acorus calamus) rhizomes and eucalyptus leaves. Dusting healthy tubers with fine wood ash controlled infestations for long periods. Seed potatoes were adequately protected by 5% malathion dust and 1.5% quinalphos dust. Potatoes kept in gunny bags impregnated with solutions of malathion 50 EC and azadirachtin 1400 p.p.m. were also free of damage. Although treatment with B. thuringiensis resulted in a low level of infestation and rotting, the percentage tuber damage remained high.
In Tunisia, Das et al. (1998) found that deltamethrin, granulosis virus and B. thuringiensis were equally effective in reducing pest damage. After 3 months' storage the treatments showed no significant effect on sprouting.
Pheromone traps are used both for monitoring populations and for control in the field and in storage (Chernii et al., 1994). The sex pheromone of P. operculella was identified as a mixture of trans-4,cis-7-tridecadienyl acetate (PTM1) and trans-4,cis-7,cis-10 tridecatrienyl acetate (PTM2) (Persoons et al., 1976). Ortu and Floris (1989) baited traps with a mixture of the compounds. The use of a large number of pheromone traps (84/ha) drastically reduced the number of captures within the field, indicating that the mating disruption techniques may be effective for controlling this pest.
In New Zealand Herman and Clearwater (1998) tested delta design DeSIRe, green plastic funnel, water and A-traps and found that DeSIRe sticky traps caught more than eight times more moths per day than the funnel traps (17 and two moths per day, respectively). This was consistent regardless of height or pheromone blend. A blend of PTM1 and PTM2 in the ratio 1:1.5 was most effective.
Tests in 1976-78 at Casablanca in Morocco, both in the field and in vegetable-packing stations, showed that the most effective traps were pans of water over which were hung rubber septa impregnated with synthetic sex pheromone of the moth (Thal, 1979). The best results were obtained with PTM1 and PTM2 at a ratio of 9:1 (Raman, 1983); all ratios tested gave better results than traps baited with virgin females. A 1:1.5 mixture remained attractive for 90 days in the field; storage at -5°C for 2 months did not reduce its efficacy. Water traps and funnel traps gave similar results to each other. Funnel traps were ideal for mass trapping: tuber damage was reduced by 23% in pheromone-treated plots. Funnel traps in stores reduced tuber and sprout damage from 60 to 8%.
Integrated Pest Management
Strategies for integrated management of P. operculella are often contained within the management of the whole complex of potato pests. The International Potato Centre (CIP) in Peru has devised a strategy to develop and implement IPM to overcome some constraints that prevent farmers from adopting such practices. Integrated pest management strategies have been developed in many areas: see also Arx et al. (1987), Das et al. (1992), Fuglie et al. (1993), Cisneros and Gregory (1994) and Berlinger et al. (1992).
Because P. operculella is such a cosmopolitan species and is considered to have reached its natural limits, phytosanitary measures are unlikely to have much effect. Where it is warm enough for the moth to survive in the open, or in warm storage, regular inspections for tuber damage should be made.
ReferencesTop of page
Abdel-Megeed MI, Abbas MG, El Sayes SM, Moharam EA, 1998. Efficacy of certain biocides against potato tuber moth, Phthorimaea operculella under field and storage conditions. Proceedings, Seventh conference of agricultural development research, Cairo, Egypt, 15-17 December 1998. Volume 1. Annals of Agricultural Science Cairo, Special Issue, Volume 1:309-317.
Afifi FML, Haydar MF, Omar HIH, 1990. Effect of different intercropping systems on tomato infestation with major insect pests; Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae), Myzus persicae Sulzer (Homoptera: Aphididae) and Phthorimpa operculella Zeller (Lepidoptera: Gelechiidae). Bulletin of Faculty of Agriculture, University of Cairo, 41(3, Suppl. 1):885-900
Ajamhasani M, Salehi L, 2004. Effect of three non cultivated plants on host preference and on oviposition rate of the potato tuber moth (Phthorimaea operculella). Journal of Agriculture Sciences , 1(5):112-119. http://research.guilan.ac.ir/jas/papers/385555Ajamhasani.pdf
Al-Ali AS, Al-Neamy IK, Abbas SA, Abdul-Masih AME, 1975. Observations on the biology of the potato tuber moth Phthorimaea operculella Zell. (Lepidoptera, Gelechiidae) in Iraq. Zeitschrift fur Angewandte Entomologie, 79(4):345-351.
Ali MA, 1993. Effects of cultural practices on reducing field infestation of potato tuber moth (Phthorimaea operculella) and greening of tubers in Sudan. Journal of Agricultural Science, 121(2):187-192
Amitava Konar, Mohasin M, 2004. Incidence of potato tuber moth, Phthorimaea operculella (Zell.) (Gelechidae: Lepidoptera), at different locations of West Bengal. Journal of Interacademicia, 8(2):230-235.
APPPC, 1987. Insect pests of economic significance affecting major crops of the countries in Asia and the Pacific region. Technical Document No. 135. Bangkok, Thailand: Regional Office for Asia and the Pacific region (RAPA).
Arnone S, Musmeci S, Bacchetta L, Cordischi N, Pucci E, Cristofaro M, Sonnino A, 1998. Research in Solanum spp. of sources of resistance to the potato tuber moth Phthorimaea operculella (Zeller). Potato Research, 41(1):39-49.
Arthurs SP, Lacey LA, Rosa Fde la, 2008. Evaluation of a granulovirus (PoGV) and Bacillus thuringensis subsp. Kurstaki fro control of the potato tuberworm (Lepidoptera: Gelechiidae) in stored tubers. Journal of Economic Entomology, 10(5):1540-1056.
Arx Rvon, Goueder J, Cheikh M, Temime AB, 1987. Integrated control of potato tubermoth Phthorimaea operculella (Zeller) in Tunisia. Insect Science and its Application, 8(4-6):989-994; [3 fig., In Recent Advances in Research on Tropical Entomology, Nairobi, Kenya, 31 August-5 September, 1986]; 14 ref.
Attia R, Mattar B, 1939. Some notes on the potato tubermoth Phthorimaea operculella Zell. Bulletin of the Society of Entomology Egypt, 2(16):136.
Baggen LR, Gurr GM, 1998. The influence of food on Copidosoma koehleri (Hymenoptera: Encyrtidae), and the use of flowering plants as a habitat management tool to enhance biological control of potato moth, Phthorimaea operculella (Lepidoptera: Gelechiidae). Biological Control, 11(1):9-17; 30 ref.
Bartoloni P, 1951. La Phthorimaea operculella Zeller (Lep. Gelechiidae) in Italia. Redia, 36:301-379.
Brown C, 2006. Breeding for resistance to tuber moth, powdery scab, black dot, and nematode cause problems. Washington State Potato Commision progress reports. Pasco, USA: Washington State Potato Commision.
Chandramonhan N, Nanjan K, 1993. Damage level and control of potato tuber moth in Nilgiris District. Madras Agricultural Journal, 80:137-139.
Chittenden FH, 1913. The potato tubermoth. United States Department of Agriculture Farmer's Bulletin:1-7.
CIP, 1992. Control biologico de la polilla de la papa con Baculovirus phthorimaea. Boletin de Capacitacion CIP. No. 2.
Clough GH, Rondon SI, DeBano SJ, David N, Hamm PB, 2010. Cultural practices to control the potato tuberworm. Journal of Economic Entomology, 103(4):1306-1311.
Coll M, Gavish S, Dori I, 2000. Population biology of the potato tubermoth, Phthorimaea opercuella (Lepidoptera: Gelechiidae) in two potato cropping systems in Israel. Bulletin of Entomology Research, 90:309-315.
Das GP, Magallona ED, Raman KV, Adalla CB, 1992. Effects of different components of IPM in the management of the potato tuber moth, in storage. Agriculture, Ecosystems & Environment, 41(3-4):321-325; 11 ref.
DeBano SJ, Hamm PB, Jensen A, Rondon SI, Landolt PJ, 2010. Spatial and temporal dynamics of potato tuberworm (Lepidoptera: Gelechiidae) in the Columbia Basin of the Pacific Northwest. Environmental Entomology, 39(1):1-14. http://docserver.ingentaconnect.com/deliver/connect/esa/0046225x/v39n1/s1.pdf?expires=1267677374&id=0000&titleid=10265&checksum=D98A6209D1D2ABBAA5C9FAC1828EB2F5
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