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.
IPM scouts trapped banded sunflower moth at one location near Carrington REC in Foster County, so emergence is beginning.
The IPM Crop Scouts have surveyed over 80 soybean fields last week and no soybean aphids were observed in North Dakota.
This peculiar looking larva is called the Argus tortoise beetle (Chelymorpha cassidea (Fabricius)).
Eighty-seven percent of the barley is in the advanced jointing crop stage in North Dakota (USDA NASS, ND – July 7, 2014) and susceptible to damage from barley thrips.
The updated degree day map for leafy spurge flea beetles (Aphthona species) indicates that land managers should collect adult flea beetles in North Dakota.
NDSU IPM scouts and crop consultants have observed the first adult wheat stem sawflies...
Aster leafhoppers were detected in only 23% of the canola fields surveyed from June 30 through July 3 in North Dakota and Minnesota.
Aster leafhoppers were found in only 20% of the canola field surveyed from June 21-25 in North Dakota and Minnesota.
Soil samples in North Dakota indicate increasing levels of overwintering wheat midge larvae (cocoons) in localized areas for the 2014 season.