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Efficacy of IPM over Chemical method for controlling Southern Tomato Leaf Miner (Tuta absoluta, Meyrick)
Arati Joshi, Dharmendra Kalauni

Last modified: 2017-08-25


Tuta absoluta, is one of the newly introduced pests of tomato in Nepal, which was first detected by Entomology Division, Nepal Agricultural Research Council from a commercial tomato grower of Balaju, Kathmandu (27044.661'N latitude and 85018.895'E longitude) on 16th May 2016. Tuta absoluta, is a nocturnal moth that falls in family Gelechiidae under order Lepidoptera. The pest occurs all round the year in Mediterranean region that is at the temperature of 20-270 C and is able to sustain in mid hills and plains of Nepal except winter. Larva of the pest is devastating causing damage in fruit, leaves, and stem. Pest mainly attacks Solanaceous crop, especially evident in tomato, however, also found in non-solanaceous crops. Tuta reduces tomato production by 80-100% in open field as well as greenhouse if no control measures are carried out. Chemicals like Spinosad and Chlorantraniliprole are used commonly in Nepal for controlling the pest, whereas, pheromone trap, water trap, Wota T trap, sticky trap, light trap, biological control, entomopathogenic microbes, cultural practices and others are practiced under IPM. However, due to wide host range, faster reproducing ability and development of pesticide resistance, chemical control have become inefficient for pest control so special attention is directed toward IPM techniques.

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