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 |
Studies on seasonal incidence of aphid (Brevicoryne brassicae L.), infesting cabbage (Brassica oleracea var. capitata L.) work was carried out at College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during 2015-16 and 2016-17. The Brevicoryne brassicae L. damage was observed with a varying degree of infestation. The peak population of aphid, Brevicoryne brassicae L., was observed 172.5 / 20 plants and 140.45/ 20 plants in month of Febuary during both years (2015-16 and 2016-17), respectively. Thereafter population started declining. Correlation studies revealed that maximum (r = -0.19, r = 0.31), minimum (r = -0.15, r = -0.33) and average (r = -0.18, r = -0.32) temperature had non significantly negative association with aphids infesting cabbage during both years (2015-16 and 2016-17), respectively. The association between aphids of cabbage and relative humidity (r = 0.34, r = 0.39) as well as sunshine hours (r = -0.13, r = 0.26) was not established during years, 2015-16 and 2016-17 respectively. There was no definite relationship between aphid population in cabbage and rainfall in both years with their correlation values (r=-0.13 and r= 0.26), respectively.
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