Robert Wright - Extension Entomologist
Spider mite damage to soybean leaves.
July 26, 2022
With growing reports of spider mites damaging corn and soybeans in Nebraska, it's important to check leaves closely, as many other crop issues can cause similar discoloration.
Figure 1. Twospotted spider mites. Almost microscopic in size, the spider mites may be imperceptible on a leaf, but become more visible against its silk-like webs. (Photos by Jim Kalisch)
July 26, 2022
Recommendations for managing spider mites in corn and soybean, including treatment thresholds and insecticides, as well as discussions on the potential impact of beneficial insects, diseases and insecticide applications.
July 19, 2022
Weekly scouting of adult rootworm beetles in July and August will provide the information needed to decide whether rootworm control is necessary next year.
July 14, 2022
If the grasshopper species currently invading field borders are one of the four major species that are likely to infest cropland, control may be warranted if high numbers are present.
July 13, 2022
Scouting should be prioritized in fields that are at the preferred growth stage for egg-laying and/or do not have the VIP3A Bt trait to protect them from western bean cutworm injury.
July 11, 2022
Extension recommendations on estimating total defoliation from multiple insects to determine need for treatment in soybean.
June 22, 2022
Nebraska growers should begin scouting for potato leafhoppers and spotted alfalfa, as these pests have been spotted in alfalfa fields in Gage County and Scottsbluff, respectively.
June 21, 2022
Measuring the amount of heat between an upper and lower threshold to which an insect has been exposed, degree-days models can provide a high level of precision in predicting western bean cutworm peak flight.