CSU pest specialist: Russian wheat aphids increasing in northeastern Colorado
Assefa Gebre-Amlak, regional pest management specialist for Colorado State University Extension, has reported increased infestations and damage by Russian wheat aphids in Adams, Weld, Washington and Logan counties.
Alfalfa weevils have also been found in alfalfa fields along the Front Range and in northeast Colorado, he said.
Severe infestations of Russian wheat aphid ranging from 10-80 percent have been observed in some wheat fields in northeastern Adams. Most of wheat fields appeared to be treated, however.
The second highest Russian wheat aphid infestation ” 25-30 percent ” was observed in Logan, a few miles east of Sterling. Fields in Washington show lower levels of infestation.
Gebre-Amlak said alfalfa weevil is the most destructive insect of alfalfa hay in the intermountain western region of the United States. Both larvae and adults feed on alfalfa; the larval stage is the damaging stage, lowering yield and quality.
For more insect control/problem information, call Gebre-Amlak at (970) 304-6535, Ext. 2074 or go to http://www.Nocopestalert.org.
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