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 |
Seasonal incidence of different sucking pests of chilli viz., thrips (Scirtothrips dorsalis Hood), mites (Polyphagotarsonemus latus Banks), Aphid (Aphis gossypii Glov.), Whitefly (Bemesia tabaci Genn.) and Jassids (Amrsca bigutula bigutula) and natural enemies like Coccinellids and spiders were worked out in the present study during 2016 at District Seed Farm (AB Block) of Bidhan Chandra Krishi Viswavidyalaya located at Kalyani, Nadia, West Bengal. Peak population of thrips was recorded to be in 18th standard week i.e. 12.58 per three leaves when the average temperature, relative humidity and weekly total rainfall were 31.2 0c, 66.79% and 17.8 mm respectively. For mite maximum population was recorded to be 28.55 per three leaves, when the average temperature, relative humidity and weekly total rainfall were recorded to be 31.040C, 74.29% and 71.1mm respectively. Similarly for Aphids peak population attained by 17th standard week i.e. 30.45 per three leaves when average temperature, relative humidity and weekly total rainfall were 33.760C, 67.29% and 0.0 mm respectively. Observation taken showed that whitefly incidence started from 1st standard week (0.44/three leaves) reaching a peak population in 44th standard week i.e. 6.22 per three leaves when the average temperature, relative humidity and weekly total rainfall were 27.720 C, 84.00% and 7.4mm respectively. Highest population of jassids reaching in 20th standard week i.e. 1.45 per three leaves when the average temperature, relative humidity and weekly total rainfall were 29.050 C, 79.86% and 67.5 mm respectively. Regarding natural enemies the observation was taken as coccinellid beetle per plant and found that coccinellid population was at its peak during 43rd standard meteorological week i.e. 18.22 per plant when average temperature, relative humidity and weekly total rainfall were 28.290 C, 80.07% and 0.0 mm respectively and Population of spiders were found to be maximum during 35th standard meteorological week i.e. 3.00 per plant when average temperature, relative humidity and weekly total rainfall were 29.060 C, 61.57% and 16.2 mm respectively.
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