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 |
Cabbage is attacked by many insect pests. Among them Diamond back moth (DBM), Plutella xylostella is an important and economic pests of cruciferous crops in particularly cabbage. In order to control the pest economically and effectively certain studies of the pest such as its seasonal incidence, peak period, extent of damage, and the climatic factors that favours its development and multiplication of the pest are necessary. Of these, adjustment of sowing time is one of the most important practices to avoid pest infestation. By changing or carefully selecting the time when a crop is planted it may be possible to avoid the egg-laying period of a particular pest, get young plants well established to a tolerant stage before the attack occurs or even get a crop matured before certain pests become abundant. The present objective was undertaken to investigate the better transplanting time for the minimized damage due to DBM. The results of field studies shown that the planting dates had significant effect on the incidence of DBM. Early planted crops recorded significantly lower leaf damage than the late planted crops. The data revealed that the lowest DBM damage percentage of 14.23% was recorded on 19th Dec. transplanted crop and highest leaf damage percentage of 41.46% on the crops transplanted on 9th Feb. It was also observed that significantly higher yield was obtained in the early planted crop (19th Dec.) with a mean yield of 19.97 t/ha than the late planted crop (7th Feb. and 29th Jan.) which gave only 6.8 and 7.8 t/ha and no heads were marketable in either case.
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