STUDIES ON DISTRIBUTION PATTERN AND EFFECTIVE MANAGEMENT OF MAJOR INSECT PESTS OF BASMATI RICE
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Date
2016
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Sardar Vallabhbhi Patel Universiy of Agriculture And Technology Meerut (U.P.)
Abstract
An investigation was carried out to study the distribution pattern and effective management of major insect pests of basmati rice in a randomized block design with three replications during Kharif, 2014 and 2015 at Crop Research Center ofSardarVallabhbhai Patel University of Agriculture and Technology, Meerut.During the crop season, 15 insect speciesencountered on basmati rice at different crop growth stages.Among these, yellow stem borer and leaf folder were recorded as severe pests. The brown plant hopper, white grub, termite and Kharif grass hopper were found to damage the crop moderately. The other insect pests recorded on the crop were of less importance and extent of their economic damage was lower. The infestation of yellow stem borer started from second fortnight of July and reached its peak during first fortnight of October. The leaf folderinfestation started in second fortnight of July and reached its peak during second fortnight of September. The population of brown plant hopper appeared first on second fortnight of July and first fortnight of August in Kharif, 2014 and 2015, respectively and reached its peak during first fortnight of October during both the years. The population of gundhi bug observed first on second fortnight of September and August during Kharif, 2014 and 2015, respectively and reached its peak during first fortnight of October. The population and infestation of these insect pests were influenced by one or more abiotic factors and crop stage. The avoidable yield loss due to major insect pests was 34.14%.
Efficacy of different treatments vizimidacloprid 17.8 SL @ 300 ml/ha, triazophos 40 EC @ 1.5 lit/ha, bifenthrin 10 EC @ 800 ml/ha, buprofezin 25 SC @ 800 ml/ha, chlorantraniliprole 18.5 SC @ 150 ml/ha, cartap hydrochloride 4G @ 20 kg/ha, NSKE @ 1.5 lit/ha, Bacillus thuringiensis 8 L @ 1 kg/ha and carbosulfan 25 EC @ 800 ml/ha against major insect pests of basmati rice revealed that chlorantraniliprole was most effective in reducing the infestation of yellow stem borer and leaf folderfollowed by cartap hydrochloride. The treatment buprofezin and imidacloprid were most effective in reducing the population of brown plant hopper and gundhi bug, respectively. The highest yield was recorded from chlorantraniliprole where as the highest cost benefit ratio was obtained fromcarbosulfan. The sequence chlorantraniliprolee - cartap hydrochloride – NSKE was found most effective against yellow stem borer and leaf folder and sequencesbuprofezin - chlorantraniliprolee - cartap hydrochloride andimidacloprid - NSKE - Bacillus thuringiensisagainst brown plant hopper and gundhi bug, respectively in basmati rice.
Description
STUDIES ON DISTRIBUTION PATTERN AND EFFECTIVE MANAGEMENT OF MAJOR INSECT PESTS OF BASMATI RICE
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