By Scout Nelson
Aphid populations, especially the English grain aphid, are rising steadily in wheat fields. While most areas have not yet reached the economic threshold, experts expect many fields will in the coming week. Farmers are advised to scout their wheat closely to prevent yield loss.
Recent scouting has shown a hopeful development: natural enemies of aphids, like parasitoid wasps and lady beetles, are present in good numbers. These beneficial insects play a key role in naturally managing aphid populations and slowing their growth.
When making pest control decisions, farmers should consider these natural enemies. Using insecticides too early may kill both the aphids and the beneficial insects.
This can lead to a problem known as aphid resurgence—when a new group of aphids enters the field or the original population survives and grows quickly again, requiring another pesticide treatment.
The need for repeated treatments increases costs and may harm long-term pest control. Farmers are encouraged to follow integrated pest management practices. This includes watching for both pest and beneficial insect activity and only using insecticides when necessary and at the right time.
Scouting is the best way to make smart decisions. Fields should be checked often to measure aphid levels and identify helpful insect species. Economic thresholds should be followed to decide if treatment is needed.
Taking a balanced approach helps protect crops, reduce pesticide use, and support natural pest control. By working with nature, farmers can manage pests more effectively and protect their wheat yields.
Photo Credit: istock-fotokostic
Categories: South Dakota, Crops, Wheat, General, Rural Lifestyle