Issue No. 14, Article 12/June 29, 2007
Timely rainfall was topic of the week for June 18 to 24. Three separate thunderstorms were active in a large portion of the region. According to the Midwestern Regional Climate Center, northeastern Illinois averaged 1.68 inches precipitation for the week, and northwestern Illinois averaged 2.48 inches. Corn, soybeans, and pasture appearance have all improved tremendously over the past 10 days.
Extension educators are monitoring western bean cutworm moth traps; as of June 26, there have been no reports of any captures of western bean cutworm moths. However, the traps are daily catching armyworm moths and yellowstriped armyworm moths.
Wheat harvest is expected to begin shortly.
The southeastern portion of the region has begun to note Japanese beetles but not presently at economic populations. Dave Feltes, IPM extension educator, reports numerous observations of potash deficiency in corn, primarily at field borders in northwestern Illinois. Jim Morrison, crop systems educator, reports some European corn borer damage in some northwestern fields of non-Bt corn, and second alfalfa harvest is underway.
Saved just in the nick of time! Most, though not all, areas received rainfall in the past week. Until then the southeast crop reporting district had been rated at 87% short to very short on soil moisture.
Corn and soybean growth stages vary, but many fields for both crops are responding to better moisture conditions and are R1 silk/bloom.
Weeds have also picked up moisture and are growing rapidly. The Japanese beetle numbers are quite significant. Too numerous to count is not really an adequate descriptionthey are something more than TNTC.
Many counties received much-needed rain late last week and over the weekend in a series of storms that moved through the region. Rainfall totals varied between 2 and 8 inches. In the Quincy area, which missed some of the weekend rain, corn planted later on lighter soils is already starting to curl again.
Rain in the region has helped corn leaves regain their deep green color. Corn is near tasseling in northern portions and is tasseling and silking in southern portions of the region. It is suspected that rootworm and Japanese beetles will be a problem this year. Japanese beetles are in areas north and west of Quincy. Fungicides are being applied to corn in some areas, and to control silk clipping from Japanese beetles some applicators are mixing fungicide treatments with insecticides.
Soybean plants are growing well; some plants are knee high and seem to be blooming earlier and smaller. Some beans in the Macomb area were damaged by high winds and hail from recent storms. Insects present in soybean fields now include leafhoppers, grape colaspis, white flies, and Japanese beetles. Applications of glyphosate in some fields in the southern portion of the region did not provide control of waterhemp.
Wheat harvest is slowly beginning is some areas of the region, with yields from 20 to 80+ bushels an acre. Northern areas of the region will likely start harvesting wheat next week.
The second cutting of alfalfa has started but is running behind schedule due to the rain. Leafhopper damage is evident in many fields, which may be sprayed after the second cutting.