BIOEFFICACY OF INSECTICIDES AGAINST POD BORER COMPLEX OF PIGEONPEA.
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Date
2019-07-22
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The experiment was laid out in a randomized blocked design (RBD) incorporating eight treatments with three replications. The pre-treatment observation were recorded 24 hours before application of treatment while, post treatment observations were recorded at 3,7 and 10 days after application of treatment. The parameters on larval population of H. armigera and E. atomosa, per cent pod damage at harvest was recorded in experimental field and natural enemies was recorded in another separate plot. Yield of pigeonpea accordingly the yield per ha was calculated to study the economics (ICBR) of different treatments.
During this investigation on the basis of above parameters revealed that treatment Rynaxypyr 18.5 SC emerged out as the most superior against pigeonpea pod borer complex in recording the lower larval population of H. armigera, E.atomosa, per cent pod damage at harvest.
Another treatment Viz, Spinosad 45 SC, Emamectin benzoate 5 SG and Neem oil 2% also perform better and emerged as next effective treatments against pod borer complex and recorded significant lower larval population, per cent pod damage at harvest, and yield of pigeonpea.
The treatment Neem oil 2% perform better for pod borer complex as compared to other treatments including control (water spray).
The observation of natural enemies on pigeonpea recorded at weekly interval. Ladybird beetle activity started from 29th SMW (0.6/plant). The peak populatin of ladybird beetle was observed in 34thSMW (1.2/plant), Chrysopa was noticed from 37th SMW (0.4/ plant) with Peak population of (4.6 chrysopa/ plant) was observed during 45th SMW and occurrence of spider started from 33rd SMW (0.2) and peak Period was observed in 44th SMW with a peak incidence(1.4 spiders /plant).
The treatment Rynaxypyr 18.5 SC recoreded the higher yield followed by Spinosad 45 SC, Emamectin benzoate 5 SG.Maximum incremental cost benefit ratio obtained from Emamectin benzoate.
The treatment with Spinosad 45 SC recorded lowest cost benefit ratio.
Description
It relates to number of larval population population of pod borers and yield of Pigeonpea by an application of botanical and chemical pesticides. Lower number of larval population of pod borers and yield of pigeonpea crop obtained when plot treated with chemical pesticides.
Keywords
Plant protection, Pesticides, Biopesticides.
Citation
RAMTEKE, KU. PRIYANKA DHANRAJ. (2019). Bioefficacy of insecticides against pod borer complex of pigeonpea. Department of agricultural entomology, Nagpur. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xiii, 89p. (unpublished).