Effect of some Brassica genotypes on development and reproduction of mustard aphid, lipaphis erysimi (Kalt.) and its predator, coccinella septempunctata (L.)

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dc.contributor.advisorS. P. Singh
dc.contributor.authorChetan Singh
dc.date.accessioned2016-11-16T11:25:16Z
dc.date.available2016-11-16T11:25:16Z
dc.date.issued2009
dc.description.abstractAn experiment was conducted during the ‘Rabi’ season 2008-09 at Chaudhary Charan Singh Haryana Agricultural University, Hisar. Development and reproduction of L. erysimi (Kalt.) and its predator C. septempunctata (L.) were studied on different four Brassica species comprising each, two genotypes of rapeseed mustard viz., Brassica campestris ( BSH and YST 151 ), B. juncea ( RH 30 and RH 9501), B. carinata (HC 212 and DLSC 2 ) and B. napus ( HNS 9605 and TERI (00) R 9903). The above studies were conducted at three plant growth stages on different plant parts, i.e. sixth leaf plant stage (20-25 days after germination), grown up plant stage (45-50 DAG) and full flowering/pod formation stage (65-70 DAG). At sixth leaf plant stage (20-25 DAG) the nymphal development of L. erysimi was faster (8.3 days) on TERI (00) R 9903, the average adult longevity and fecundity per female were maximum (18.6 days and 100.3 nymphs) as compared to other genotypes and it was because of low glucosinolates (GLS) (25.10 μ mole/g defatted meal). On HNS 9605, the mustard aphid had maximum nymphal period (9.8 days), lowest adult longevity (17.5 days) and minimum fecundity per female (68.9 nymphs) closely followed by DLSC 2 due to high amount of GLS (54.30 μ mole/g defatted meal) in genotype, HNS 9605 and DLSC 2. Similar trend was also observed at grown-up plant stage (45-50 DAG) and at full flowering/pod formation stage (65-70 DAG) for L. erysimi development and reproduction. Development and feeding potential of C. septempunctata was studied under laboratory conditions on L. erysimi reared on different rapeseed mustard genotypes. pre-oviposition period, oviposition period, post-oviposition period, fecundity per female and sex ratio were varied from 3.5 to 7.3, 13.5 to 16.5, 2.8 to 4.8 days, 368.5 to 550.0 eggs per female and 1:1.3 to 1:1.7, respectively. It was minimum on genotype, HNS 9605 and maximum on TERI (00) R 9903. The incubation period, total period of grub instar, pupal period, male and female adult longevity were recorded maximum (4.6, 11.4, 4.6, 22.5 and 28.6 days, respectively) on genotype, TERI (00) R 9903 and minimum (3.8, 10.0, 3.8, 17.8 and 19.3 days, respectively) on HNS 9605. The total number of aphids consumed by a grub C. septempunctata to become pupa varied from 301.8 to 359.5 aphids and it was minimum on genotype, HNS 9605 and maximum on TERI (00) R 9903. While, male and female adults of C. septempunctata were also consumed minimum number of aphids (1773.5 and 1984.7 aphids) on genotype, HNS 9605 and consumed maximum number of aphids (2038.4 and 2490.2 aphids) on genotype, TERI (00) R 9903.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/85797
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomology
dc.subjectBacteria, Azotobacter, Sowing, Planting, Insecticides, Biological development, Pesticides, Biofertilizers, Wheats, Wooden_US
dc.these.typeM.Sc
dc.titleEffect of some Brassica genotypes on development and reproduction of mustard aphid, lipaphis erysimi (Kalt.) and its predator, coccinella septempunctata (L.)en_US
dc.typeThesisen_US
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