Soybean gall midge infestations have been confirmed in six new Nebraska counties since 2018.Treatment is not recommended at this time, but scouting and reporting infestations will continue to be important to plan for management next year.
A significant number of soybean gall midge adults have been collected from this year’s soybean fields in east-central and northeast Nebraska. Dead and dying plants have been observed near infested sites in both northeast and east central Nebraska.
Since June 30, low levels of adult emergence have been observed from east-central and northeast Nebraska counties from last year’s soybean fields. On July 2 and July 4 adults were found emerging from this year's soybeans in east-central Nebraska.
In Nebraska, soybean gall midge larval injury to soybean has been found in most areas where adult soybean gall midge activity occurred over the past two weeks It is unlikely foliar insecticides will affect this insect.
Soybean gall midge larvae found feeding within soybean plants in east central Nebraska mean foliar applications will likely no longer be effective. In northeast Nebraska, however, they may still be effective for a short time.
Emergence of soybean gall midge continues to increase in eastern Nebraska. Traps are being monitored daily and will be reported to allow growers to plan insecticide application for highest efficacy. (June 18, 2019)
Soybean gall midge adults were collected June 14 and 15 in Cass County, but have not yet been found elsewhere in Nebraska traps. This article addresses when and where treatment is warranted. (June 15, 2019)