Evaluation of some systemic and non-systemic fungicides against the charcoal rot pathogen macrophomina phaseolina (TASS1) goid. of maize

Abstract

Eight fungicides of both systemic (Agrizim, Bavistin, Derosal and Mopsin) and non-systemic (Captaf, Foltaf, Thiride and Rizolex) groups were tested against Macrophomina phaseolina (Tassi) Goid. inciting charcoal rot in maize. In vitro study showed complete inhibition of growth of the pathogen at a very low concentration (30 ppm) with Bavistin followed by Mopsin (40 ppm), Agrizim (100 ppm), Rizolex (120 ppm), Derosal (200 ppm), Foltaf (500 ppm), Captaf (600 ppm) and Thiride (1000 ppm). Complete inhibition of sclerotial germination, however, occurred with Mopsin and Thiride, and the germination was poor to very poor with the remaining fungicides. Pot culture experiments in 'sick soil' showed that Derosal, Foltaf and Mopsin were the best in reducing charcoal rot incidence while field experiments in 'sick plot' showed that Bavistin was the best followed by Mopsin, Derosal and Agrizim