Trends on incidence and losses due to leaf curl (LCD) and spotted wilt (SWD) diseases of tomato in relation to their vectors were studied at Kanpur, India. The population of whitefly and thrips on tomato was found to be maximum respectively in February and March. The incidence of LCD was found maximum in January and February while that of SWD in March. The losses due to LCD were the reduction in plant height, number of fruits and fruit weight, while SWD, in addition, killed the plants resulting in total loss. The average yield loss/ha was 163.68 q and 126.12 q or Rs. 8184 and 6306 due to LCD and SWD respectively.
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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