Scouting Tips for Onion Thrips in Onions
Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program
To find the first thrips of the season, look deep into the leaf axils. Inspect 20 to 30 plants and count the total number of onion thrips (OT) per plant and divide by the average number of leaves per plant to get the number of OT per leaf. Thrips feeding causes silvery streaking along the leaves. If you can already see thrips feeding damage that is also a good indication that it is time to spray. If there is a lot of feeding damage, than you likely missed a timely first spray.
Scouting Tips for Onion Thrips in Onions (pdf; 239KB)
Upcoming Events
2024 Dry Bean Growers Twilight Meeting
September 24, 2024
Stafford, NY
Get updated! At this on-farm meeting, hear updates in Western bean cutworm monitoring and management, white mold management, weeds and herbicides, and insights from the dry bean variety trial. 1.5 DEC credits will be available in categories 1a, 10, 21, and 23.