Abstract

A field experiment was carried out during the sunimer season 1982-83 to evaluate the efficacy of 9 insecticides against the post complex of tomato, Var. Pusa ruby. The Treatment of decamethrin proved most effective (1.23% damage) against the fruit borer followed by fenvalerate (2.20% damage) and permethrin (2.76% damage). Three treatments viz., decamethrin, fenvalerate and permethrin offered the best protection against white flies. These three insecticides, also. were effective in reducing the incidence of leaf curl virus. The jassid poulation was significantly low in the three treatments. Considering the economics of insecticidal application in relation to extra yield obtained, the decamethrin gave highest fruit yield (20.000 kg/ha) and highest not profit of Rs. 6,120 per ha followed by permethrin. It is contemplated that the synthetic pyrethorids due to their quick knock down effect, low mammalian toxicity and longer persistense on the treated surface have a bright future in controlling the insect pests of tomato.

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