Extension center educators, unit educators, and unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season. The regions have been defined broadly to include the agricultural statistics districts as designated by the Illinois Agricultural Statistics Service, with slight modifications:|
· North (Northwest and Northeast districts, plus Stark and Marshall counties)
· West central (West and West Southwest districts, and Peoria, Woodford, Tazewell, Mason, Menard, and Logan counties from the Central district)
· East central (East and East Southeast districts [except Marion, Clay, Richland, and Lawrence counties], McLean, DeWitt, and Macon counties from the Central district)
· South (Southwest and Southeast districts, and Marion, Clay, Richland, and Lawrence counties from the East Southeast district)
We hope these reports will provide additional benefits for staying current as the season progresses.
Hot and dry conditions persist throughout the region. Small amounts of early-planted corn began to tassel over the weekend. Initial tassel emergence appears very uneven. Generally the corn crop has held up fairly well considering the lack of rainfall and high temperatures. However, rainfall is needed over the next 10 days as more acreage begins to tassel. Reports continue to be received of high populations of Japanese beetles, and producers are encouraged to scout for potential silk clippings. Several reports have been received of severe rootworm larvae injury to corn roots in Carroll, Putnam, Grundy, Kane, and LaSalle counties. Rootworm larvae injury was reported in first-year cornfields in LaSalle and Kane counties.
Soybean leaf cupping has been evident for about 3 weeks, with minimal producer concern. Soybeans have been "growing out" of the condition very slowly.
As most second cutting of alfalfa is nearing completion, potato leafhopper populations still persist.
The past week offered a welcome break from the heat, but only limited areas received desperately needed rainfall. Early-planted corn has been pollinating for some time and appears to be in good condition despite the lack of water, while corn that was either planted at a later date or was subject to prolonged ponding earlier this summer is showing signs of severe drought stress (i.e., delayed development, and rolling and firing of lower leaves).
Early-planted soybeans seem to have found subsoil moisture and have grown rapidly the past few weeks. Some of the late-planted soybean fields are still waiting for their roots to reach the moisture. A significant portion of soybean fields are being resprayed because of the reduced efficacy of some herbicides.
Oat harvest has begun in some areas and is progressing rapidly. Insect pests do not appear to be of any consequence, but growers and industry personnel alike are monitoring grasshopper populations in pastures and field edges and scouting closely for signs of spider mite feeding in soybeans.