STUDIES ON THE VARIETAL PREFERENCE, BIOLOGY AND MANAGEMENT OF THE GROUNDNUT BRUCHID Caryedon serratus (Olivier)
KrishiKosh
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Title |
STUDIES ON THE VARIETAL PREFERENCE, BIOLOGY AND MANAGEMENT OF THE GROUNDNUT BRUCHID Caryedon serratus (Olivier)
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Creator |
HASANSAB.A.NADAF
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Contributor |
KOTESWARA RAO, S.R
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Subject |
PREFERENCE, BIOLOGY, MANAGEMENT, GROUNDNUT, BRUCHID, Caryedon, serratus
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Description |
Studies on the varietal preference, biology and management of groundnut bruchid, Caryedon serratus (Olivier) were conducted in the Department of Entomology, College of Agriculture, Rajendranagar during November, 2007 to June, 2008. The preference of different groundnut varieties by C.serratus was tested based on fecundity, number of adults emerged, mean development period, index of susceptibility, index of suitability, growth index, per cent survival of C. serratus and per cent weight loss of pods. The test varieties were grouped into three categories as least susceptible, moderately susceptible and highly susceptible based on mean and S.D. values. The physical characters like thickness of the shell, interpod space and interkernel space were determined in pods and kernels of groundnut variety and correlation were worked out with the above parameters. The varieties TPT-25 and OG-52-1 recorded minimum fecundity, less adult emergence, more mean development period, low index of susceptibility, low index of suitability, low growth index, less per cent survival and minimum weight loss. These were categorised as least susceptible varieties. Studies on the biology of C.serratus at ambient conditions, 30oC+RH 50%, 30oC+RH 80% and 30oC+RH 90% revealed that the average egg period 6.3, 10.42, 5.48 and 7.12 days, the grub period 21.08, 23.08, 20.72 and 19.18 days and the pupal period 9.22, 13.66, 9.4 and 9.66 days at ambient conditions, RH 50%, 80% and 90% at temperature 30oC, respectively. The average longevity of adult male was 12.78, 20.98, 14.58 and 13.18days and adult female was 17.94, 25.44, 17.34 and 15.52 days at ambient conditions, RH 50%, 80% and 90% at temperature 30oC, respectively. Studies on relative efficacy of grain protectants against C.serratus indicated that the treatment of groundnut pods with sweet flag rhizome powder (10 g) was found to be effective in disrupting the bruchid development by recording pods with no eggs, no pod damage and no adult emergence for the first two months. The pods treated with neem seed kernel powder (10 g) protected the pods effectively against C. serratus damage for the first two months by recording 1.69 and 2.06% pod damage when compared with the control, wherein 14.11 and 17.79% pods damage was noticed during first and second month, respectively. Spinosad and deltamethrin proved their merit throughout experimental period by achieving zero per cent pods with egg, pod damage for first two months and adult emergence for first three months. Even though, sweet flag rhizome powder (10 g) and deltamethrin (0.02 g) continued to be effective for the first two months by recording zero per cent pods with eggs, pod damage and adult emergence, in the latter months these treatments were less effective than deltamethrin (0.04 g) and both the concentrations of spinosad. Therefore, spinosad (0.5 and 1.0 ml) and deltamethrin (0.04 g) can be recommended for use as pre storage grain protectants. |
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Date |
2016-08-05T10:46:31Z
2016-08-05T10:46:31Z 2008 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/71012
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Language |
en
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Relation |
D8285;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
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