Effect of Fungicides, Insecticides, and Their Combinations on Stand Establishment and Yield of Cotton. A. J. Kappelman, Jr.,, Research Plant Pathologist, Agricultural Research, Science and Education Administration, U.S. Department of Agriculture, and Adjunct Associate Professor, Department of Agronomy and Soils, Auburn University (Alabama) Agricultural Experiment Station, Auburn, AL 36830. Plant Dis. 64:1076-1078. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1980. DOI: 10.1094/PD-64-1076.

The effects of pesticides individually and in combination on cotton growth were evaluated in fields in Alabama during 1977 and 1978. Under favorable environmental conditions following the 1977 planting, no treatment increased early growth, but 11 reduced emergence and nine reduced seedling survival to less than that in check plots. The May-July drought, followed by extensive worm damage, wet weather in August and September, and resultant boll rot affected yields; only plots receiving three treatments had increased seed cotton yields. Six treatments tested in 1978 increased emergence or seedling survival under the adverse growing conditions after planting. Metalaxyl/pentachloronitrobenzene (1:8) plus aldicarb significantly increased yields in 1977, and metalaxyl plus aldicarb emergence and seedling survival in 1978.