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Estimation of avoidable yield loss due to fruit borer, Helicoverpa armigera (Hubner) in tomato planted at different dates in lower Kullu valley, Himachal Pradesh



Estimation of avoidable yield loss due to fruit borer, Helicoverpa armigera (Hubner) in tomato planted at different dates in lower Kullu valley, Himachal Pradesh



Pest Management and Economic Zoology 7(2): 155-159



Studies undertaken on the estimation of avoidable yield loss due to fruit borer, Helicoverpa armigera, in tomato (cv. Roma) planted at three dates (first week each of April, May and June), during 1993 and 1994, in Kullu valley, Himachal Pradesh, India, showed that in crop transplanted in the first week of April yield loss to the extent of 105.29, 76.02 and 57.02% could be avoided by giving three sprays of acephate (0.05%), fenvalerate (0.01%) and endosulfan (0.05%), respectively.

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