Title : EVALUATION OF PRE-HARVEST SPRAYING OF INSECTICIDES AND BOTANICALS FOR MANAGEMENT OF PULSE BEETLE (Callosobruchus spp.) ON PIGEONPEA.
Loading...
Date
2022-07-29
Journal Title
Journal ISSN
Volume Title
Publisher
Publisher : Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
Abstract : The present investigation entitled “Evaluation of pre-harvest spraying of insecticides and botanicals for management of pulse beetle (Callosobruchus spp.) on pigeonpea” was undertaken to find out the effect of different insecticides against bruchids in stored pigeonpea. The experiment was conducted in the laboratory of Seed Technology Research Unit, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during the year 2020-2021. The experiment was laid out in the factorial randomized block design consisted of five treatment combination involving three replications. Insecticides viz. Emamectin benzoate 5 SG @ 0.3 g/L, Azadirachtin 10,000 ppm @ 2.0 ml/L, Azadirachtin 10,000 ppm @ 4.0 ml/L, Azadirachtin 10,000 ppm @ 6.0 ml/L were sprayed in field with three different spraying schedule at different growth stages of pigeonpea crop i.e. spraying at 50% pod maturity (S1), spraying at pod maturity (S2) and spraying at 50% pod maturity and maturity (S3). Harvested seeds were stored in laboratory for two months. Number of egg laid by pulse beetle differed significantly due to pre-harvest spray of insecticides and different spraying schedules. The lowest number of eggs laid by pulse beetle were recorded in treatment Emamectin benzoate 5 SG @ 0.3 g/L (0.33) followed by Azadirachtin 10,000 ppm @ 6.0 ml/L (0.67), Azadirachtin 10,000 ppm @ 4.0 ml/L (2.89) and Azadirachtin 10,000 ppm @ 2.0 ml/L (3.44). In case of spraying scheduled lower number of eggs laid by pulse beetle was recorded in spraying at 50% pod maturity and maturity stage (3.07) as compared to other spraying. In interaction effect significantly lowest number of eggs was recorded in pre-harvest spraying of Emamectin benzoate 5G @ 0.3 g/L at 50% pod maturity and maturity stage (0.00). Similarly, lowest number of adult emergence and per cent seed damage was recorded in insecticide treatment Emamectin benzoate 5 SG @ 0.3 g/L (0.33) (0.16) followed by Azadirachtin 10,000 ppm @ 6.0 ml/L (0.67) (0.31), Azadirachtin 10,000 ppm @ 4.0 ml/L (2.00) (0.69) and Azadirachtin 10,000 ppm @ 2.0 ml/L (2.22) (1.11). Among the spraying scheduled spraying at 50% pod maturity and maturity stage (2.67) (0.79) observed minimum adult emergence and per cent seed damage as compare to others. The application of Emamectin benzoate 5 SG @ 0.3 g/L twice at 50% pod maturity and maturity stages (0.00) (0.00) recorded significantly minimum adult emergence as well as per cent seed damage to check the infestation of pulse beetle during storage up to two months. The average mean life period of Callosobruchus chinensis was 39 days. The average incubation period, oviposition period and larval+pupal period of Callosobruchus chinensis was lasted for an average of 5.33, 9.67 and 22.33 days. The females lived for an average of 12.33 days whereas the male lived for an average of 9.33 days.
Description
Description : The present investigation was carried out at Seed Technology Research Unit, Dr. PDKV, Akola during 2020-21. The treatment comprised of insecticide, Emamectin Benzoate 5 SG @ 0.3 g/L, Azadirachtin 10,000 ppm @ 2.0 ml/L, Azadirachtin 10,000 ppm @ 4.0 ml/L, Azadirachtin 10,000 ppm @ 6.0 ml/L and Control (water) which were executed in Factorial randomized block design with three replications.
Keywords
Citation
Citation : PATANKAR, CHETNA SHANTIPRAKASH. (2021). Evaluation of pre-harvest spraying of insecticides and botanicals for management of pulse beetle (Callosobruchus spp.) on Pigeonpea. Department of Entomology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2021. Print. xiii, 80p. (Unpublished).