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Extension Entomology

Dectes Stem Borer

–by Dr. Jeff Whitworth and Dr. Holly Schwarting

Adult Dectes (soybean or sunflower) stem borers are very active in north central Kansa where they are aggregating on weeds adjacent to last year’s soybean stubble.  They will soon be dispersing to this year’s soybean fields to start inserting eggs into stems and petioles.

Dectes on weeds

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