IPM Scouts have observed very low numbers of grasshopper nymphs (only 1 nymph per square yard) that have just hatched in field ditches in Cass and Barnes counties in SE ND.
Recent periods of relatively warm temperatures in the Red River Valley (RRV) have likely accelerated development of overwintered sugarbeet root maggot (SBRM) larvae.
Numerous calls/emails on crops (winter wheat, hard red spring wheat, field pea, and sugar beets) damaged by wireworms have been received over the past weeks, especially in crops in no-till systems.
EPA has open a comment period on Transform®/Closer®/Sequoia® with Isoclast® insecticide (a.i. sulfoxalfor) from Dow AgroSciences until June 17th.
Based on May 17th degree day accumulations (see map below) for alfalfa weevils in North Dakota, adult weevils are emerging.
In addition to last week’s detection of cereal aphids in SE area of North Dakota, low densities of cereal aphids were detected in Minot in NC area.
Crucifer and stripped flea beetles have emerged from overwintering sites in shelterbelts and have been observed in canola fields in Langdon and Minot .
This large worm (or larva) about 2 inches long was found tunneling into the heartwood of an old ash tree near Minot, ND.
Cutworms are still being reported causing damage in winter wheat, spring wheat, and field peas in NW and SW North Dakota, and NE Montana.
Our first cereal aphids, English grain aphids and bird cherry oat aphids were detected in wheat last week in Cass and Richland counties in southeast North Dakota.
The early start to field preparation this spring likely resulted in some sugarbeet seed being planted into cool soils.
A few questions have come into the office on what these large mosquito-like insects are!
These revised crop insect pest publications summarize the Integrated Pest Management practices for that insect, including identification, life cycle, crop damage, pest monitoring, cultural control, host plant resistance, biological control and chemical control.
This table summarizes the transgenic traits that are available in corn for insects and weed management.
Army cutworm and pale western cutworm have been reported feeding on winter wheat and weedy cultivated fields in NW and SW North Dakota.
With some of last year's grain crop still in storage and a bumper crop expected this year, the demand for grain storage is high.
Soybean aphids are decreasing or stagnant in most soybean fields. You can see this in the final soybean aphid map (below) from the IPM scouting program.
This article is worth repeating - the importance of getting bins ready for grain storage to minimize insect pest problems in bins (2013 Crop & Pest Report).
This week’s Good Bug Corner features several good bugs and fungal pathogens.
Banded sunflower moth traps continue to have high trap counts, >100 moth per trap per week, in most sunflower producing areas.