7/11/2016 12:00:00 AM
Amalgamated Sugar Company Field Staff are reporting the Black bean aphids have been found in the Dry Lake Area of Canyon County. In 2015, UI Extension Entomologist Dr. Erik Wenninger posted this information about black bean aphids. The black bean aphid is a dark-bodied aphid, about 1/16 inch long; individuals may be winged or wingless. Aphids may be found on the young leaves within the crown of sugar beets. Infestations usually occur as scattered hot spots or along edges rather than uniformly across the entire field. Colonies can produce massive amounts of honeydew, which causes a black, sooty mold to cover the leaves.
There are no formal economic thresholds for insecticide treatment decisions for bean aphids, but treatment should be considered if fields are under heavy pressure. When scouting a field, it is important to sample plants in several representative areas across a field, because infestations may be patchy. Also, several predators (notably, lady beetles) and parasites attack bean aphids and may effectively suppress aphid populations. Therefore, it is advisable to assess natural enemy populations when making a decision on whether to apply insecticides. In addition to sugar beets, black bean aphids may be found in other crops, including beans and corn.
You may be able to tank mix insecticides for black bean aphid with fungicides used for powdery mildew. Make sure to read and follow the label and contact your Field Consultant from AMSCO for more treatment options.
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