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Grasshoppers living off the lush food source provided by nearby fields could be a threat to your winter wheat crop when it’s emerging, especially if temperatures are warm this fall. Three or more grasshoppers per square yard within a field can destroy seedling wheat1, so be sure to continue scouting your alfalfa crop if positioned near wheat and spray when necessary. An application of Grizzly® Too insecticide can help hinder their movement to wheat.
Aphids not only feed on wheat, but they can also transmit Barley Yellow Dwarf virus. More than 20 different aphid species can carry the disease2, so consider your area’s history and be diligent in your scouting efforts. A well-timed application of Grizzly Too or Yuma® 4E insecticide can help suppress aphid pressure.
Winter grain mite populations peak around October and March, and sandy, coarse fields are more at risk. A crop will have a stunted, silver-gray appearance from the road when there is significant pressure. Malathion 5 insecticide can provide good control.
Brown wheat mites are most active in late fall and early spring. They cause stippling of the leaves by piercing plant cells and give the crop a scorched and weathered appearance from a distance. An application of Yuma or Dimate 4E insecticide can help curb this pest.
Armyworms tend to be more of a problem in the spring, but populations can multiply in the fall under warm conditions. These crawlers eat fast and move fast. In fact, one larva can eat about 43 linear inches of plant tissue with 75% of that in a three- to four-day period. For that reason, you need to spray for them as soon as they show up in your fields. Grizzly Too or Yuma insecticide treatments can be effective in reducing armyworm populations.
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Crop performance is dependent on several factors many of which are beyond the control of WinField United,
including without limitation, soil type, pest pressures, agronomic practices and weather conditions.
Growers are encouraged to consider data from multiple locations, over multiple years, and to be mindful of how such agronomic conditions could impact results. CornSorb®,
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