BIO-INTENSIVE INTEGRATED PEST MANAGEMENT OF MAJOR INSECT PESTS OF BRINJAL (SOLANUM MELONGENA GUEN.)
Loading...
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
Study on bio-intensive integrated pest management of major insect pests of brinjal (Solanum melongena Guen.) was carried out at Entomological field, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha for two consecutive year during 2014 and 2015. The studies revealed that the more than 29 insect pests specie were associated with brinjal crop in the Jammu region. Out of fourteen (14) insect pests, five (5) insect pests were categorized as major insect on the basis of economic losses caused in brinjal ecosystem. Apart from insect pest, a large number of natural enemy fauna (12 species of predators and 3 species of parasitoids) were recorded. The observations on seasonal natural fluctuation of Brinjal Shoot and Fruit Borer (BSFB) larval and adult population and Red Spider Mite (RSM) on brinjal were recorded at weekly intervals starting from 15th to 36th standard week during 2014 and 17th to 37th standard weeks during 2015. The two peak of BSFB larval population build-up observed during 24th (14.33 larvae per plant) and 32nd standard weeks (11.66 mean larval population per plant) on brinjal crop during 2014 while in 2015, peak larval number of 14.00 larvae per brinjal plant was recorded during 30th standard week. The two peaks of adult male trap catch population were noticed during 20th (5.33 moths per trap per week) and in 30th (4.66) standard week in pheromone traps and 22nd (22.33 moths per trap per week) and 30th (19.66 moths per trap per week) in wota trap during 2014 which constituted the two overlapping generations of BSFB pest in Jammu region. The trap catches of BFSB (adult) population in pheromone trap during 2015 showed that the peak trap catches of 11.33 moths per trap per week in 30th standard week while, in Wota trap, the peak activity of 19.67 moths per trap per week in 31st standard week. The maximum of 51.81 mean number of red spider mite (RSM), T. neocalidonicus per 4 cm2 on brinjal were recorded in 25th standard week during 2014. Whereas, during 2015, two peaks of adult mite populations were recorded i.e., in 26th SW with 36.02 red mite per 4cm2 leaf area and in 35th SW with 24.37 mite per 4cm2 leaf area, respectively. The correlation studies indicated the BSFB (larvae) populations were found positively correlated with relative humidity (morning, evening) and rainfall and negatively correlated with maximum temperature. The overall impact of weather factors on population build up of BSFB larval population was 57.3 per cent 83.8% during 2014 and 2015, respectively. The pooled data on BSFB (adult) populations in pheromone trap catches were observed to be positively correlated with temperature (minimum), relative humidity (morning). Wheareas, in case of wota trap catches, it was recorded to be positively correlated with temperature (minimum). The overall impact of weather factor was found to be 58.0 and 64.3 %. per cent in Wota trap catches during 2014 and 2015, respectively. The correlation studies showed that the adult population of the red mite was recorded to be negatively correlated with relative humidity (morning) and rainfall, and positively corelated with relative humidity (morning) and rainfall, and positively correlated with temperature (maximum and Minimum) and overall impact of weather factors on population build up of red mite was recorded to be 42.2 per cent.
Description
Keywords
null
Citation
No. of references 204