Japanese Beetle Observations
Japanese Beetles have emerged in Central Illinois over the last week making their way to corn and soybean fields.
Feeding on soybeans will first be noticed on the upper and outermost leaves as the beetles make their way inward. Severe defoliation and yield loss is a concern and regular scouting or treatment should take place when thresholds are met. There are many effective insecticides on the market that can also be tank mixed with a fungicide and BRANDT foliar nutritional products.
Damage to corn plants can also come in the form of foliage damage, but more of a concern is feeding on the tassel and/or ear silks. Japanese Beetles feeding in these locations can interrupt pollination/reproduction thus leading to yield loss through undeveloped ears. Like in soybeans, there are many effective insecticides on the market and the timing is right to be paired up with a fungicide and BRANDT foliar nutritional product.
Keep in mind tank solution pH when spraying an insecticide. BRANDT Smart Trio, a nutritional foliar, has the ability to acidify tank mix solutions ideal for insecticide sprays.
More information from the University of Illinois can be found here: http://extension.cropsciences.illinois.edu/fieldcrops/insects/japanese_beetle/