IPM Newsletter

A good sampling plan is to check 6 feet of row at five locations or take 25 sweeps at four locations in averagesized fields (about 50 acres). Increase sampling points proportionately with the acreage in a field. Make sure sample points are scattered over the entire field. Look for:

  • Seedling/Stem Feeding Check seedlings very closely until the plants are about 12 inches tall. The stems become woody and severe damage from seedling pests becomes less likely at this time. Look for insects that may be on the plant (threecornered alfalfa hopper) or in the soil around the base of the plants (lesser corn stalk borer, cutworms). Evaluate stand loss (percentage of dead or dying plants) and try to determine if future stand loss is probable (insects easily found and actively damaging plants).

Foliage Feeders:
Determine which insects are eating the foliage and estimate percent defoliation. Use a sweep net or a drop cloth (shake sheet) to sample for insect pests. At each sample point, estimate percent foliage loss so that an average can be calculated for the field. For soybean aphids, begin scouting in early July. Look for aphids on the undersides of upper leaves in vegetative and flowering soybeans. Estimate aphid density per plant at 5-10 locations throughout the field.

Pod-Feeders:
After full bloom (when pods are being “set”) look closely for any pod-feeding caterpillars (corn earworms and fall armyworms) and stink bugs that are dislodged onto the shake cloth or into the sweep net. Count these carefully.

For more information concerning soybean pest control, please visit: PB1768-Soybean in PDF format

Other IPM Programs within Tennessee

Cotton IPM

Corn

School IPM

Urban IPM / Fire Ants

For more information concerning Integrated Pest Management Programs, contact: Dr. Scott Stewart
West Tennessee Research and Education Center
605 Airways Blvd.
Jackson, TN 38301
Phone = (731) 425-4709
email = sdstewart@utk.edu