Ecology Journal

Ecology Journal

Ecology Journal

Ecology Journal

Management of fruit borer of tomato using cypermethrin



 

ABSTRACT: Cypermethrin 10 EC was applied in the tomato field following different doses and spray schedule to know the infestation of tomato by fruit borer Helicoverpa armigera Hübner (Lepidoptera: Noctuidae). The study also investigated the yield of tomato and benefit cost ratio of cypermethrin applied to control fruit borer. Results showed that the tested doses of Cypermethrin significantly reduced the infestation level of tomato and exerted higher yield. The lowest rate of fruit infestation (2.50% number and 1.92% weight) and the highest marketable yield (32.7 t ha-1) were obtained with Cypermethrin 10 EC @ 1 ml/L water sprayed at 45 days after transplanting and repetition of the same at 7 days interval. The highest marginal benefit cost ratio (6.6) was found with Cypermethrin 10 EC @ 1 ml l-1 of water sprayed after initiation of 5% level of fruit infestation and repetition of the same at 15 days interval. 

 

Keywords: Insect, insecticide doses, Solanum lycopersicum, Helicoverpa armigera