A scouting program located in northwest North Dakota was initiated in 2016, and included monitoring for several major insect pests of field peas and lentils from late May to mid-August.
Potato psyllids have been reported in specific fields in western and central North Dakota.
Dingy cutworms moths are being observed laying eggs on sunflower heads (and other Asteraceae species), especially along weedy field margins.
Many people have remarked about how difficult it has been to find monarch butterflies or larvae (caterpillars) this year.
This article is worth repeating on the important of getting bins ready for grain storage to minimized insect pest problems in bins (Source: 2014 Crop & Pest Report).
Pea aphids are being observed at economic populations in the NW area of North Dakota (source: A. Kalil, NW Pulse Crop Survey, Williston REC).
In North Dakota, soybean aphid continues to be sub-economic.
Northern corn rootworm beetles have been emerging the last two weeks.
The new generation of adult flea beetles emerges after mid-July and feeds on the green foliage and developing green pods of canola.
Adult grasshoppers are starting to move into rows crops, such as flax, field corn and sunflowers, as the cereal grains are starting to dry down and be harvested, and ditches are hayed.
Updates on Zeal SC miticide, Agri Mek SC miticide, and Force 3G.
Continue to scout for red sunflower seed weevils, and banded sunflower moths/sunflower moths in sunflowers until fields reach the R5.7 crop stage (70% of the head area has completed or is flowering).
This week’s mystery insect is a giant ichneumonid wasp called Megarhyssa atrata.
The USDA NASS reports that 22% of the sunflowers were blooming in North Dakota (USDA NASS News Release – July 25, 2016).
Pheromone trap catches continue to show high numbers of banded sunflower moths and sunflower moths located in southeast and north central North Dakota (see maps below).
About 135 fields were scouted by the NDSU and UMN Crop IPM Scouts for soybean aphids the last two weeks.
Alfalfa webworm larvae (worms) have been observed causing foliar defoliation in soybeans and sunflower, mainly in the north central area of North Dakota. Some of the field reports include Makoti, Minot, Mohall and Max.
If you need to spray flowering sunflowers or other flowering field crops, please remember to PROTECT BEES by notifying bee keepers before an insecticide application.
I’ve updated this scouting article on red sunflower seed weevil (RSSW) from last year’s Crop & Pest Report.
Pheromone traps run by the IPM Survey scouts showed higher numbers of banded sunflower moths located in southeast and north central North Dakota and increasing numbers of sunflower moths in north central North Dakota.