Development of a sequential sampling plan for classifying Thrips tabaci (Thysanoptera: Thripidae) populations in onion fields.

Onion thrips, Thrips tabaci Lindeman, is a global pest of onion crops, causing substantial economic damage by diminishing bulb yields and transmitting plant pathogens. Insecticides are used to manage T. tabaci infestations with control decisions traditionally based on action thresholds that require visually counting thrips on a fixed, predetermined number of onion plants per field.

Identifying Onion Fields at Risk of in New York.

(IYSV) poses a significant threat to dry bulb onion, L., production and can lead to substantial yield reductions. IYSV is transmitted by onion thrips, (Lindeman), but not via seed.

Spatiotemporal Patterns of Iris Yellow Spot Virus and Its Onion Thrips Vector, , in Transplanted and Seeded Onion Fields in New York.

Onion thrips, (Lindeman), transmits iris yellow spot virus (IYSV) and is one of the most important pests of Allium crops. IYSV is a member of the species in the genus of the family . This virus typically reduces overall onion bulb quality and weight but can also prematurely kill onion plants.

Species Identification and Fungicide Sensitivity of Fungi Causing Alternaria Leaf Blight and Head Rot in Cole Crops in the Eastern United States.

Alternaria leaf blight and head rot is an important disease of broccoli and other cole crops. With no resistant host varieties, fungicides are utilized to manage this disease. However, anecdotal evidence suggests that, in southeastern U.

Spatiotemporal Dynamics of Stemphylium Leaf Blight and Potential Inoculum Sources in New York Onion Fields.

Stemphylium leaf blight (SLB) caused by is the dominant foliar disease affecting large-scale onion production in New York. The disease is managed by fungicides, but control failures are prevalent and are attributed to fungicide resistance. Little is known of the relative role of inoculum sources in initiation and spread of SLB epidemics.

Stemphylium Leaf Blight: A Re-Emerging Threat to Onion Production in Eastern North America.

Stemphylium leaf blight (SLB), caused by , is a foliar disease of onion worldwide, and has recently become an important disease in the northeastern United States and Ontario, Canada. The symptoms begin as small, tan to brown lesions on the leaves that can progress to defoliate plants. Crop loss occurs through reduced photosynthetic area, resulting in smaller, lower-quality bulbs.

Emergence of Stemphylium Leaf Blight of Onion in New York Associated With Fungicide Resistance.

A complex of foliar diseases affects onion production in New York, including Botrytis leaf blight (), purple blotch (), Stemphylium leaf blight (SLB; ), and downy mildew (). Surveys were conducted in 2015 and 2016 to evaluate the cause of severe premature foliar dieback in New York onion fields. SLB was the most prevalent disease among fields with the greatest incidence, surpassing downy mildew, purple blotch, and Botrytis leaf blight.

Occurrence of the new invasive insect Contarinia nasturtii (Diptera: Cecidomyiidae) on cruciferous weeds.

Contarinia nasturtii (Kieffer) (Diptera: Cecidomyiidae), a common insect pest in Europe and a new invasive pest in North America, causes severe damage to cruciferous crops. In the United States, C. nasturtii was first reported in western New York in 2004.