Elad, Y., Department of Plant Pathology and Microbiology, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Kalfon, A., Department of Plant Pathology and Microbiology, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Chet, I., Department of Plant Pathology and Microbiology, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel

Coating cotton seeds with Trichoderma spp. reduced the incidence of disease caused by R. solani by up to 83% in the greenhouse. T. hamatum was more efficient in disease control at 20°C, while T. harzianum was superior at 27°C. Disease severity was reduced by 47-60% in two field experiments, showing no statistical difference from treatment with pentachloronitrobenzene. © 1982 Martinus Nijhoff/Dr W. Junk Publishers.