Like much of the state, in LaSalle County it has been hot with only one day in the past week having some scattered showers. There are some scattered thunderstorms in the forecast for next week, though. Overall crops are still looking good, but the soil is starting to dry out a bit on top. Corn at the IVCC research and demonstration plots is at V5, and soy is at V2/3 (both planted May 20). Later planted or replanted crops in LaSalle County are at similar maturity, but earlier planted corn is reaching V10 – V11 stage and some earlier soy is getting close to R1.

The recent hot weather and relative lack of rain is starting to show in the corn and soybean fields in Douglas County. Estimates from the Midwestern Regional Climate Center show the county has received approximately 1 – 1.5 inches of rain since the first of the month, which is 1.5 – 2 inches below the 30-year average (1991 – 2020). Most corn fields I saw during my drive around the county in the early afternoon were showing some degree of drought stress with rolled leaves. More mature plants at V10+ were generally only showing rolled leaves near the top of the plant, while leaves on corn still in the V3-V6 were fully rolled up. I saw an even greater range in soybean growth stage across the county, with some fields recently emerged and still at VC while others were well into flowering with most plants at R2. Weed control was also variable. Although most fields looked relatively clean, I found a couple corn fields with heavy waterhemp pressure and even more soybean fields with well-established waterhemp, marestail, volunteer corn, and some morningglories starting to take off.

High temperatures have entered the area and are putting pressure on crops in Logan, Menard, and Sangamon counties. While there has not been a major rainfall event for some time, and the topsoil moisture supply is lower, there is still moisture down further in the root zone that is allowing crops to receive water. The forecast shows no break in the heat anytime soon, and chances for rain each day remain in flux. Most of the crops still appear to be healthy and have yet to exhibit signs of heat stress. There are some crops, especially ones in sandier soils, that are beginning to exhibit signs of stress. Not much else has changed in the way of growing conditions across the three counties.

After a busy week of finishing up planting, replanting and every other aspect of farming, we received a rain last night that will help us make it through the approaching heatwave.

No rain in the last few weeks and the heat has started. Corn is at V8 and V6 growth stages. Soybeans are at R1, V2/V3, and VC. No pests or diseases found. Sulfur deficiency showing in V6 corn with weaker root systems. Waterhemp breaking through in V2/V3 soybeans.

Corn stages range from VE- V7, with bean stages similar. Most corn herbicide applications are complete, and side dress nitrogen is almost completed. Little crop response has been noted, and corn is looking good but could use a drink.