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Researcher Singh, Sunil
Advisor Ahmad, Hafeez
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher Sher-e-Kashmir University of Agricultural Sciences and Technology
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Life sciences; biology ♦ Technology ♦ Agriculture & related technologies ♦ Garden crops (Horticulture)
Subject Keyword Cabbage Butterfly ♦ Bacillus ♦ Proteins ♦ Minerals ♦ Vegetable Crops ♦ Seasonal Abundance ♦ Biology and Management of Cabbage Butterfly ♦ Pieris Brassicae (linn.) On Cabbage (brassica Oleracea Var. Capitata) ♦ Entomology
Abstract The present investigations on seasonal abundance, biology and management of cabbage butterfly were carried out at Pounichak and Division of Entomology, FOA, SKUAST-J, Udheywalla, Jammu during the year 2002-03. Studies on seasonal abundance revealed that the pest first appeared in 43rd standard week (October) of 2002 and remained active upto 7th standard week (February) of 2003 with the peak population (58.1 larvae per plant) in 50th standard week (December). Simple and partial correlation coefficients revealed that none of the abiotic factors exhibited significant correlation with the pest population. Coefficient of multiple determination (R2) indicated 23 per cent changes of pest population due to combined effect of abiotic factors. The biological studies on this pest revealed that after a mating period of 1.88 ± 0.88 and 2.10 ± 0.79 days, the female started laying eggs 1.20 ± 0.26 and 1.80 ± 0.55 days after mating during spring and winter season, respectively. Eggs were laid in clusters mostly on the under surface of the leaf and a single female laid on an average 53.40 ±30.76 eggs (spring) and 33.20 ± 14.20 eggs (winter) during a total oviposition period of 3.20 ± 0.75 and 3.50 ± 1.10 days, respectively. The larvae passed through five instars and the total larval duration lasted for 23.40 ± 0.89 during spring and 34.00 ± 1.23 days during winter. The total developmental period from egg to adult emergence varied from 37.60 ± 1.81 days (spring) and 78.90 + 12.19 days (winter). Longevity of adult male was 6.40 ± 1.04 and 7.30 ± 1.33 days, while for female it was 6.80 ± 0.76 and 8.60 + 0.98 days during spring and winter, respectively. Studies on cultural control of this pest revealed that the crop sown during last Week of August (recommended sowing time) harboured lowest pest population which gave maximum marketable yield and proved significantly superior to all other treatments. Among the various insecticides, biopesticides and botanicals viz. endosulfan 35EC, carbaryl 50WP, malathion 50EC, dimethoate 25EC, chlorpyriphos 20EC, Bacillus thuringiensis var. kurstaki 53000 lU/mg and neem oil 20EC, evaluated against the pest on winter crop. It was found that all the treatments resulted in significant reduction of pest and increase in marketable yield of crop. However, at recommended doses, endosulfan 0.07 per cent proved to be most effective in terms of cost benefit ratio (1 : 24.21) followed by dimethoate 0.03 per cent (1 : 24.13) and chlorpyriphos 0.05 per cent (1 : 23.52). Neem oil 0.04 per cent and Bacillus thuringiensis var. kurstaki 0.4 per cent also significantly suppressed the pest population but had low cost benefit ratio of 1 : 7.49 and 1 : 10.42, respectively.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Jammu
Size (in Bytes) 9.63 MB
Page Count 133