J. N. Krishi Vishwa Vidyalaya, College of Agriculture, Jndore (M.P.)
The phytotoxicity of phosphamidon, dimethoate, thiometon, endosulfan, malathion, methyl parathion, DDVP and endrin, each as 0.03 and 0.04 per cent emulsions, and carbaryl as 10 per cent dust was studied on bottlegourd, cucumber and tinda. Dimethoate was slightly phytotoxic to bottlegourd as 0.03 per cent spray, while it was also slightly toxic to tinda as 0.04 per cent spray. Parathion at both concentrations was mildly phytotoxic to cucumber but highly toxic to bottlegourd and tinda. Endrin 0.03 per cent spray was mildly toxic to cucumber but highly phytotoxic to bottlegourd and tinda, whereas as 0.04 per cent spray it was highly phytotoxic to all the cucurbits under trial. Endrin and parathion proved to be the most phytotoxic. Bottlegourd was most sensitive to these insecticides, followed by tinda and cucumber. The safe (non-phytotoxic) insecticides on the cucurbits were (in order of merit)—DDVP, carbaryl, malathion, endosulfan, thiometon and phosphamidon.
