Distribution of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) in tomato fields and its relationship to weather factors |
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| Authors: | Waqas WAKIL M Usman GHAZANFAR Yong Jung KWON Mirza A QAYYUM Fozia NASIR |
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| Institution: | 1. University College of Agriculture, Sargodha, University of Sargodha, Pakistan;2. School of Applied Biology and Chemistry, Kyungpook National University, Sankyuk-dong, Daegu, 701-710, South Korea;3. Department of Agri-Entomology, University of Agriculture, Faisalabad, Pakistan |
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| Abstract: | A survey was conducted in tomato fields at different localities to assess the distribution of tomato fruitworm Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) in Punjab Province, Pakistan. The effect of weather factors on its population was also investigated. Eleven tomato-growing districts were selected and data for larval population and fruit infestation were recorded. The maximum larval population (5.2 larvae/plant) of H. armigera was recorded in Bahawalpur district with 32.6% fruit infestation. However, the minimum larval population (1.4 larvae/plant) inflicted 14.7% fruit infestation in Rawalpindi district. The temperature was positively correlated while relative humidity showed negative interaction with the larval population and fruit infestation. |
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| Keywords: | distribution population relative humidity temperature tomato fruitworm |
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