In Wisconsin, vegetable crops are threatened annually by the aster yellows phytoplasma (AYp), which is obligately transmitted by the aster leafhopper. Using a multiyear, multilocation data set, seasonal patterns of leafhopper abundance and infectivity were modeled. A seasonal aster yellows index...

In Wisconsin, vegetable crops are threatened annually by infection of the aster yellows phytoplasma (AYp), the causal agent of aster yellows (AY) disease, vectored by the aster leafhopper, Macrosteles quadrilineatus Forbes. Aster leafhopper abundance and infectivity are influenced by processes...

A new distribution map is provided for Beet mosaic virus. Potyviridae: Potyvirus. Hosts: beetroot (Beta vulgaris), sugarbeet (Beta vulgaris var. saccharifera) and white yam (Dioscorea alata). Information is given on the geographical distribution in Europe (Albania, Austria, Belgium, Bulgaria,...

A new distribution map is given for Tobacco etch virus (Potyviridae: Potyvirus). The hosts include bell pepper (Capsicum annuum), tomato (Solanum lycopersicum) and tobacco (Nicotiana tabacum). Information is provided on the geographical distribution in Europe (Cyprus, France, Hungary and Russia),...

A new distribution map is provided for Bean pod mottle virus. Comoviridae: Comovirus. Hosts: common bean (Phaseolus vulgaris) and soyabean (Glycine max). Information is given on the geographical distribution in Asia (Iran), North America (Canada, Ontario, USA, Alabama, Arkansas, Illinois, Indiana,...

During the 2001 growing season, 191 symptomatic soyabean (Glycine max) plants were dug from production plots in Indiana, Wisconsin, and Kentucky, USA. Alfalfa mosaic virus (AMV), bean pod mottle virus (BPMV), bean yellow mosaic virus (BYMV), peanut stunt virus (PSV), tobacco ringspot virus (TRSV),...

Viral-like symptoms, characterized by mosaic, crinkling, and reduced size of leaflets were observed on 53 kura clover (T. amgibuum [T. ambiguum]) plants in an 88-plant collection (plant introductions and cultivars) growing in the field (Wisconsin, USA). A 20-plant subset was screened for alfalfa...

Red pine (Pinus resinosa) decline, characterized by an expanding circular area of dead and declining trees, is becoming increasingly prevalent in US Lake States plantations. A 3-year study was conducted to determine whether any insects, fungi and/or soil parameters were associated with this...

Field tests were carried out at various sites in New York State, Delaware, Pennsylvania, Rhode Island, Maryland, Virginia, North Carolina and Wisconsin in 1975-76 to evaluate the effectiveness of surrounding elm [Ulmus] groves with sticky traps baited with multilure [ alpha -cubebene, with...