Grain yield in the spring crop of continuous double-cropped irrigated corn declined from 11.3 to 7.2 t/ha during 1978-1983. Soil fumigation with DD-MENCS in February reduced root disease, eliminated symptoms of decline, increased yield and reduced populations of basidiomycetes, Phoma spp., Fusarium spp. and total fungi in soil. Fertility and tillage practices, a winter crop of rye, and soil treatments with fenamiphos and metalaxyl did not prevent decline(.)
No takes yet. Share an insight, caveat, or question.
Donald R. Sumner (1990) studied this question.