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 |
Field studies were undertaken at Agricultural Research Farm, Darsi, Andhra Pradesh to study the comparative bio-efficacy of cow based (dung and urine) fermented organic products viz., neemastra, brahmastra and agniastra at 20% along with Neem Seed Kernel Extract (NSKE) 5 % against the major pests of castor and their safety to natural enemies during 2016-17. NSKE 5% recorded least no. of mean larval population of Achaea janata (1.06 plant-1), Spodoptera litura (0.78 plant-1), capsule damage by Conogethes punctiferalis (17.0%) and was no way inferior to recommended insecticidal check treatment (0.74, 0.66 larvae plant-1 and 11.7%, respectively). NSKE @5% and neemastra @20% registered significantly least (2.15 and 2.40 hoppers leaf-1) population of Empoasca flavescens and were on par with the other organics including insecticidal check (2.63 leaf-1) but superior to untreated control (3.8 leaf-1). NSKE 5% followed by neemastra, brahmastra and agniastra conserved highest population of coccinellids (1.3, 1.1, 1.0 and 0.96 plant-1, respectively), spiders (1.0, 1.0, 1.0 and 1.08 plant-1, respectively) and Microplitis coccons (1.34, 1.15, 1.11 and 1.1 plant-1, respectively) which were at par with untreated control (1.5, 1.3 and 1.5 plant-1, respectively). NSKE 5% recorded higher seed yield of 742 kg ha-1 with ICBR of 16.4 followed by agniastra (474 kg ha-1) with ICBR of 3.4 and were next best to insecticidal check (885 kg ha-1) recorded ICBR of 10.2.
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