— by Dr. Jeff Whitworth and Dr. Holly Schwarting
The situation seems about the same throughout north central Kansas with regard to insect pests. Still finding mixed populations of aphids (greenbugs, corn leaf, yellow sugarcane, and sugarcane) but beneficial insect populations (mainly green lacewings, lady beetles, parasitic wasps, and occasionally syrphid fly larvae) still remain plentiful. Headworms are also plentiful in just about every field that is not yet at soft dough. Remember, expect 5% loss/worm/head between flowering and soft dough. Chinch bugs, both adults and nymphs, are also plentiful at the base of most plants but can also be found feeding on young developing berries in the heads.
–by Dr. Jeff Whitworth and Dr. Holly Schwarting
Received a report from north central Kansas about a small wheat field infested with ca. 20 aphids/tiller, but the aphids weren’t identified. All wheat fields we visited in the last week had aphids, including bird cherry-oat, English grain, and/or greenbugs. However, we were only finding about 1/10 plants or less and beneficials (lady beetles, lacewings, and parasitic wasp activity) were present in all of these fields. Most wheat averaged Feekes 6-8 and no other pests really have been noted.
—by Dr. Jeff Whitworth – Dr. Holly Schwarting – J.R. Ewing and Salehe Abbar & Dr. Brian McCornack
Wheat aphids, primarily greenbugs, but bird cherry oat and English grain aphids as well, continue to migrate into wheat fields all over the state. However, there are increasing numbers of lady beetles and parasitic wasps (see photo of mummy). Hopefully these beneficials will keep these aphids well below treatment thresholds.
More information about greenbug identification, current management recommendations, or their natural enemies can be found on the myFields.info website (www.myfields.info).