HERBAL MANAGEMENT OF MAJOR INSECT PESTS OF PADDY.
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Date
2019-07-24
Authors
Journal Title
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Publisher
Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The results of seasonal incidence experiment were revealed that, yellow stem borer, gall midge, leaf folder, green leaf hopper and brown plant hopper were the main pests which damaged the crop. The results revealed that, Incidence of stem borer was initiated from 32nd MW and continued to 47th MW and its peak incidence during 36th MW (6.45 % DH) and 42nd MW (11.23% DH). The incidence of gall midge was initiated from 35th MW and continued to 45th MW and its peak incidence during 40th MW (15.21 % SS). The incidence of leaf folder was initiated from 33rd MW and continued to 47th MW and reached peak level during 44th MW (6.62 % damaged leaves). Population of green leaf hopper were initiated from 32nd MW and continued to 47th MW and its peak incidence during 44th MW (2.77 nos./hill). Population of brown plant hopper was initiated from 36th MW and continued to 47th MW and its peak incidence during 44th MW (12.6 nos./hill). Population of white backed plant hopper were initiated from last week of august (35th MW) to 47th MW and its peak incidence during 44th MW (4.47 nos./hill) and Incidence of army worm started from 29th MW and then reached zero level. Further the fluctuation in the incidence was recorded from 33rd MW up to 47th MW and attained peak infestation during 40th MW (0.36 nos./hill). The incidence of rice gundhi bug was commenced from 44th MW to 47th MW and attained peak incidence during 46th MW.
The correlation analysis results revealed that, minimum temperature (r= -0.501) had significant negative correlation with incidence of rice stem borer. Maximum temperature (r= 0.680) had significant positive correlation with incidence of gall midge. Incidence of leaf folder had significant positive correlation with maximum temperature (r= 0.606) and significant negative correlation with minimum temperature at 5 % significant level. Rainfall (r= -0.655) and minimum temperature (r= -0.749) had significant negative correlation and maximum temperature (r= 0.734) and green mirid bug (r= 0.767) had significant positive correlation with population of green leaf hopper. Rainy days (r= -615) had significant negative correlation and brown mirid bug (r= 0.585) had significant positive correlation with population of green leaf hopper. Rainfall (r= -0.617) and rainy days (r= -671) had significant negative correlation and maximum temperature (r= 0.597) had significant positive correlation with population of brown plant hopper at 5 % significant level. Similarly, impact of green mirid bug (r= 0.953) and brown mirid bug (r= 0.898) on population of brown plant hopper showed significant positive correlation at 1 % significant level. Minimum temperature (r= -0.798) showed significant negative significant correlation with population of brown plant hopper at 1% significant level. In case of white backed plant hopper, rainfall (r= -0.615) and rainy days (r= -638) had significant negative correlation and maximum temperature (r= 0.646) had positive significant correlation with population of white backed plant hopper at 5 % significant level. Similarly, impact of green mirid bug (r= 0.870) and brown mirid bug (r= 0.842) on population of white backed plant hopper showed positive significant correlation at 1 % significant level. Minimum temperature (r= -0.781) showed significant negative correlation with population of white backed plant hopper at 1 % significant level.
From the findings of present investigation in second experiment of insect pests management the treatment of 5% NSKE (1.57 % DH) was found significantly superior in reducing the incidence of dead hearts and for the management of white earheads (stem borer) of paddy 5 % NSKE (2.81 % WE) was found significantly superior treatment. The treatment of 5% garadi leaf extract (1.36 % SS) was found significantly superior in reducing the incidence of gall midge and treatment of 5 % bitter gourd leaf extract (2.06 % damaged leaves) was found significantly superior in reducing the incidence of leaf folder. Treatment of neem oil (1.01 nos./hill) was found significantly superior in reducing the population of green leaf hopper to other treatments and 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract (2.42 nos./hill) was found significantly superior in reducing the population of brown plant hopper. Treatment of M. anisopliae (1.20 nos./hill) was found significantly superior in reducing the population of white backed plant hopper than other treatments. Regarding to natural enemies, the treatment of 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract was found superior with higher population of brown mirid bug, green mirid bug, coccinellid beetle and spiders. The maximum yield recorded in the treatment combination of 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract (39.33 q/ha). However, the ICBR was found in the treatment with treatment M. anisopliae (1:12.13).
Description
The experiment were revealed that yellow stem borer, gall midge, leaf folder, green leaf hopper and brown plant hopper were the main pests which damaged the crop and by utilizing botanical and herbal plant extract we identify which herbal extract and botanical is effective and which is superior for per cent reduction of major insect pests of paddy and safe to natural enemies.
Keywords
Plant protection, Bio pesticides.
Citation
SAMRIT, KU. REKHA MADHUKAR. (2019). Herbal management of major insect pests of paddy. Department of agricultural entomology, Nagpur. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xiii, 134p. (unpublished).