The goal of the IPM Survey is to detect the presence severity of diseases and insect pests that are common in agricultural crops grown in North Dakota and to verify the absence of pests that might be of export concern.
Corn rootworms are becoming a more common insect pest of corn in North Dakota. Northern corn rootworms are more common this year than the western corn rootworms.
Stored Grain Integrated Pest Management in the North Central United States Friday, September 12, 2014 10:00 a.m. to 12:00 p.m. CT
Two insects have been reported clipping silks in field corn – red-headed flea beetles (Systena frontalis) and sap beetles or picnic beetles (Glischrochilus quadrisignatus).
Soybean aphid infestations are spotty this year. Some fields in the Red River Valley have hot spots of aphids and have reached the economic threshold level requiring an insecticidal treatment.
Banded sunflower moths continue to be trapped at high numbers in IPM scout pheromone traps. However, trap captures for the migratory sunflower moth are low throughout the state.
The NDSU Extension IPM Crop Scouts surveyed over 790 fields in wheat, barley, soybean and sunflowers during the last two weeks.
My graduate student, Veronica Calles-Torrez, just started picking up northern corn rootworm adults in her emergence traps near Arthur and Page, northern Cass County.
Field reports of red sunflower seed weevil (RSSW) adults are being observed in early flowering sunflowers near Bismarck at economic threshold levels and Minot (V. Chapara, NCREC).
Soybean aphid populations are growing fast with these moderate temperatures (high 70sF to low 80sF) and many new colonies and winged aphids are present in fields.
Red sunflower seed weevil (RSSW) adults will be emerging soon and will fly to the nearest flowering sunflowers.
Sunflower moth continues to be trapped at low, sub-economic levels in the IPM scouts’ pheromone traps.
The IPM Crop Scouts surveyed 92 soybean fields last week and soybean aphids were observed in only 9% of the fields surveyed.
Control of seed-infesting insect pests is important for confection sunflowers and dehulled oilseed sunflowers since they are grown under contract with very low tolerance levels of insect seed damage.
IPM scouts are detecting increasing numbers of banded sunflower moths in pheromone traps.
Wheat midge is near the end of its flight...
One to two sunflower moths per trap per week were detected in IPM scout’s pheromone traps in Golden Valley, Stark and Cass Counties.
The soybean aphids have arrived right on time!
Continue to scout for wheat midge from heading through early flowering (<50% flowered), especially in areas where the 2013 fall soil survey indicated moderate to high risk for wheat midge larvae (see map on right).
Grasshopper nymphs are increasing in some areas (see maps below) and may start moving into field edges of crops.