Will ASR affect full-season and doublecrop systems equally?
ASR could affect both systems equally if ASR were to arrive early in the season when full-season soybeans are in the R1 to R2 stage (e.g. flowering). However, since double-crop soybeans lag ten to 15 days in development, they are at a higher risk of exposure to higher inoculum levels of ASR. However, keep in mind that dry and hot weather could greatly reduce development/ movement of ASR. Furthermore, double-crop soybeans produce a smaller, less dense canopy that will not support disease development as well as the larger, more dense canopy of full-season soybeans. The amount of canopy and weather may have more impact on disease development than planting date or maturity group.
