Evaluation trials on screening of advanced varieties, hybrid entries and efficacy of natural formulations against major insect pests on pigeonpea
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Date
2022-07
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G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
The present field experiments were conducted to screen out different advanced varieties, hybrid entries of pigeon pea and to validate the efficacy of different natural formulations i.e., Jersy cow urine@20%, Holstein cow urine@20%, Desi cow urine 20%, NLWE@ 5% ( Neem Leaf Water Extract), NSWE@5% ( Neem Seed Water Extract), NLCUE@5% (Neem Leaf Cow Urine Extract), NSCUE@5% (Neem Seed Cow Urine Extract),Azadirachtin@1500 ppm, NSKE @5 %) and insecticide i.e. Chlorantraniliprole 18.5 SC @ 30g a.i/ha (Standard check) against major insect pests of pigeon pea during the kharif crop season, 2021-22 at Norman E. Borlaug Crop Research Centre, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. Under advanced varietal trial, in variety PA650 the least numbers of Maruca webs/plant, number of H. armigera larvae and pod bugs were recorded i.e., 7.67, 1.89, 1.68, respectively with the least per cent of pod damage caused by Maruca, Helicoverpa and pod fly and seed damage by pod bugs was recorded (2.67, 4.00 and 6.33) and (8.67), respectively.On the basis of the least cumulative pod damage and high grain yield, PA650 (16.99% and 813kg/ha) and PA291 (C)(19.67% and 792 kg/ha)were recorded highly resistant against inseect pest complex of pigeonpeawith PSR rating- 3.. Similarly, under screening trial for Hybrid entries, on the basis of less cumulative pod damage and high grain yield, PAH 16 (11.67% and 834kg/ha) and IPH 18-04 (18.33% and 768 kg/ha) were found the most effective against pod bugs and pod borers on pigeonpea. On the basis of PSR values calculated for these two hybrid entries, PAH16 ( PSR-2)and IPH 18-04 (PSR-3) there were recorded as highly resistant to major insect pest complex of pigeon pea. Among natural formulations, pigeon pea plots treated with Azadirachtin@ 1500ppm was recorded with the least cumulative pod damage (13.33%) followed by NSCUE 5% (17.67%). The highest grain yield was recorded in plot treated with Azadirachtin 1500ppm (1122 kg/ha) followed by NSCUE 5% (1070 kg/ha) and Desi cow urine 20% (1034 kg/ha) in comparison to untreated control (718 kg/ha). In the context of cost benefit ratio calculated for tested natural formulations, NSCUE 5% and Azadirachtin 1500ppm @ 5ml/l were found the most effective natural formulations with low cost and high ICBR (1: 8.03 and 1:7.49.) against pod bugs and pod borer complex of pigeon pea. On the basis of above findings, the present study clearly showed that the resistant varieties along with application of natural formulations were found the most effective for the management of major
insect pests of pigeon pea. Thus, it can finally be concluded that, resistant varieties along with natural formulations can easily be incorporated for the management of major insect pests of pigeon pea.