National Academy of Agricultural Sciences (NAAS)
|
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 |
This paper discusses the population dynamics of rice insect-pests and its correlation with abiotic factor in Kanpur district of U.P. Incidence and abundance of rice insect-pests. Paddy crop was monitored during the seasons kharif, 2015 & 2016. This investigation revealed that pest activity commenced from 34th Standard meteorological week (SMW) and continued to 49th std. week. Highest dead hearts (7.20 & 6.90%) of YSB (Scirpophaga incertulas) was found in the 39th std. week in both years. The 44th std. week registered the highest population of LF (Both, D% & No./5 sweeps) and GLH in kharif, 2015 & 2016. Grass Hopper’s population was its peak level (4.15) at 41st std. week in kharif, 2015 whereas it was found maximum in at 42nd std. week in kharif, 2016.The maximum population (20.50 & 21.60) of GB was recorded at 43rd in both years kharif, 2015 and 2016, respectively. The 42nd std. week observed highest No. (4.95) of spider in kharif, 2015 while, it was maximum (5.75) at 39th std. week in kharif, 2016. Population of Dragon Fly was highest (1.50) at 39th std. week in kharif, 2015, whereas it was found maximum (2.25) at 41st std. week in kharif, 2016. The highest No. (3.35 & 3.10) of Damsel Fly was recorded at 42nd std. week in both the experimental years kharif, 2015 & 2016 respectively. The 44th std. week recorded the maximum No. (7.85) of LBB in kharif, 2015 while, it was observed its peak level (8.25) at 39th std. week in second year of experimental investigation kharif, 2016. Maximum temperature and relative humidity morning favours the YSB, LF, GH, GLH, GB, Spider, Drgn fly, Dmsl fly and LBB but rain fall and relative humidity evening was not ideal for insect-pests and natural enemies.
Citations |
 |
 |
 |
 |
