Field screening of certain tomato varieties for their resistant reaction against Helicoverpa armigera (Hubner) in Manipur valley, India.

Relative performance of 13 tomato hybrid varieties against the fruit borer, Helicoverpa armigera (Hubner) infestation was studied during 2010-2011. None of the varieties was found to be highly resistant. Two varieties, viz., NS-538 (Namdhari seed) and Shaktiman were least infested and classified as resistant varieties. Nine varieties viz., NS-501 (Namdhari seed), Lakshmi, Shahenshah, NS-815 (Namdhari seed), All rounder, Manithoibi, Manileima, Ms (Marglobe supreme) and American Apple were graded as moderately resistant. Two varieties viz., Dev and Manikhumnu were rated as moderately susceptible. The study indicated that the varieties as promising source of resistance may be incorporated in the integrated pest management. [ABSTRACT FROM AUTHOR]