Tuber treatment with imidacloprid is effective for control of potato stem necrosis disease
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Authors
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R.B. SINGH2, S.M. PAUL KHURANNA, S.K. PANDEY2 and K.K. SRIVASTAVA1
1 Agricultural Research Station, RAU, Kota 324 001, 2 Central Potato Research Institute, Shimla 171 001
Keywords:
Potato, stem necrosis, insecticides, imidacloprid, seed treatment, tospovirusAbstract
For chemical control of potato stem necrosis disease [?potato stem necrosis virus] (PSNV), experiments were conducted over 5 years (1993-94 to 97-98) in India with sprays of either monocrotophos/malathion, or soil applications of phorate, carbofuranand/or seed tuber treatment with imidacloprid, a new systemic insecticide. Of the treatments tested, 10 min. dip of seed tubers in 0.1% solution of imidacloprid reduced disease incidence (DI) by 60-74% and the disease index (DX) by 67-81% and enhanced tuber yields by 15-43%. Control of PSNV was equally effective through seed treatment with 0.1% 'Confidor' solution. Three fortnightly sprays of monocrotophos reduced DI by 70% and DX by 84% but enhanced yield by only 24%.
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