Agriculture Commissioner Doug Goehring encourages farmers, ranchers, pesticide dealers and applicators, government agencies and homeowners to bring their unusable pesticides to any of the 12 Project Safe Send collections in July.
Transform® (sulfoxaflor) is pending registration in North Dakota for this summer. It will be labeled for control of aphids, leafhoppers, plant bugs and other sap-feeding insects in the following crops: barley, wheat, canola, soybeans, potatoes and dry beans. See article following this from Dow AgroSciences.
Cool wet soils will favor damage from seedcorn maggots and wireworms. As seeds or seedlings sit in the cool soil with little growth, they will become more susceptible to injury from these soil insects.
Adult alfalfa weevils are emerging and have been observed in the southwest and north central regions of North Dakota (sources: J. Stegmiller; V. Chapara, NCREC).
Summer field scouts were trained in survey protocols on May 20th at the Carrington REC.
National Assessment Shows Geographic Distributions and Trends of Pesticide Use, 1992-2009 The U.S. Geological Survey’s Pesticide National Synthesis Project provides a new interactive national maps and trend graphs on the usage of 459 pesticides in agriculture for each year during 1992-2009 for the U.S.
Using the Degree Day (DD) map (below), adult alfalfa weevil should be emerging soon (around 250 accumulated DD) in the southeast corner of North Dakota. The southwest region of North Dakota is around 150 accumulated DDs. With the recent rains, alfalfa should be growing fast which will help mitigate the injury caused by alfalfa weevil feeding.
Using the Degree Day Model for alfalfa weevil, we can expect adult alfalfa weevil emergence around 250-300 DD
Alfalfa weevil was very damaging in North Dakota last year due to its early emergence and the drought stressed alfalfa. The early emergence may have been due to eggs, which successfully overwintered during the mild winter of 2011/12, and as a result they hatched into larvae which started feeding on foliage earlier than normal.
Large numbers of army cutworms have been reported in alfalfa fields in southwest North Dakota, near Rhame. Larvae (or caterpillars) overwinter as partially mature larvae and are ready to start feeding on alfalfa, winter wheat, canola and other early planted crops as soon as the temperatures warm up.
EPA approves insecticide for bee parasite in North Dakota, the nation's leading honey producing state, where there are 478,000 hives registered.
Two weather conditions that can impact insect development are temperature and moisture. Insect development generally speeds up with warmer temperatures, since insects are poikilothermic (cold-blooded).
I visited a corn field in northern Richland County with Greg LaPlante from the North Dakota Corn Grower Association last week.
Grasshoppers continue to be a risk to row crops, especially in western North Dakota. Reports of field corn, sunflower, flax and other crops being defoliated by high populations of grasshoppers are being observed near Dickinson.
Sugarbeet root aphids (Fig. 1) have been detected in several sugarbeet fields in the central and southern Red River Valley (RRV). The outbreak area includes fields in all of American Crystal’s RRV factory districts except Drayton.
Japanese beetle, Popillia japonica Newman, belongs to the insect family Scarabaeidae. It is a highly destructive plant pest and feeds on over 300 host plants.
Blister beetles have been reported in high numbers in hay crops in the south-central, southwest and north-central regions of North Dakota.
Flights of banded sunflower moth have continued to be unusually high for mid-August. Moths were present for a total of about eight weeks this season because of an extended emergence period.
Here are some excellent resources for learning more about scouting and decision-making for spider mites in soybeans.