Can rainfall totals explain the general lack of soil insecticide performance in Illinois during 1997?
Precipitation data collected from Monmouth and Urbana suggests that rainfall was most likely not a factor. Rainfall at both locations was well between the wet and dry extremes described previously. Despite moderate precipitation levels, root ratings for many soil insecticides were well above 3.0 and 4.0 at Urbana and Monmouth, respectively, in 1997. Although the importance of precipitation and soil moisture can’t be downplayed in understanding the dynamic nature of soil insecticides and root protection, other environmental and biological variables are involved.
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