National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Predators are important links in the food chain and are needed to maintain herbivore population in crop ecosystem in check. However, like other insects, they are also vulnerable to various weather factors, which impedes the natural control that they contribute to the ecosystem. Information on impact of weather factors on predators helps to understand natural control better and also formulate integrated pest management practices. The present study was conducted in the fields of Agricultural Research Institute, Rajendranagar during rabi 2018-19 with a view to study the population dynamics of various spiders and Coccinellids in tomato crop and the impact of weather factors on them. Results revealed that out of all the ten families of spiders recorded, Araneid spiders were the most abundantly found spiders in the crop (2.96 spiders/ quadrat), while Pholcids were the least commonly recorded (0.01 spiders/quadrat). Araneids, Oxyopids and Tetragnathids and the three Coccinellid genera were recorded from the first week after transplantation (43 SMW) to the end of the harvest (4 SMW), while the other species were recorded from the second week after transplantation to harvest. Spiders of family Theridiidae were recorded only in the last three weeks of the crop. Most of the weather factors except maximum temperature were found to have negligible impact on most of the spider species and Coccienllids.
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