Corn blotch leafminer, Agromyza parvicornis, is a leaf-feeding insect normally considered an “occasional or non-economic” pest.
Christian Krupke
Reports of grasshoppers within fields have been received. The pictures and videos included with the emails showed numerous grasshopper nymphs severely defoliating soybean that were planted into a standing cereal rye cover crop. The soybean plants were delayed in growth, as they were shaded by the dying rye. Grasshoppers, as the name suggests, love feeding on a range of grasses but are certainly not limited to this group of plants.
A considerable number of male western bean cutworm moths have emerged and been captured in the last week. Some pest managers have reported finding egg masses. As previously mentioned, the female moths seem to have a preference for depositing eggs on the upright leaves just before tasseling. The hatched larvae will crawl immediately to the whorl or leaf axils, depending on corn’s growth stage, for protection while feeding on leaf tissue and/or pollen
With the recent heavy rains and winds in many parts of the state, it seems like a good time to talk about corn lodging.
Potato leafhopper populations were noticeably higher after last week’s tropical storm remnants blew through, and now the warmer temperature will drive further increases.
Pheromone traps placed on campus by Purdue’s Turfgrass Entomology & Applied Ecology program have detected emergence of Japanese beetle.
Weather systems originating in the south will often carry insects north with them.
Armyworm moth captures have varied this spring, with some being quite impressive (see “Armyworm Pheromone Trap Report”).
Many species of cutworms feed on corn and soybean if it’s available.
Black cutworm moth catches in many of our cooperator’s pheromone traps continue to be quite impressive (see “Black Cutworm Adult Pheromone Trap Report”).
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