Evaluation of eggplant (Solanum melongena L.) genotypes for field resistance against major insect pests

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dc.contributor.advisorMalik, V.S.
dc.contributor.authorChoudri, Chandrashekhar
dc.date.accessioned2016-11-22T14:23:29Z
dc.date.available2016-11-22T14:23:29Z
dc.date.issued2007
dc.description.abstractTwenty-five genotypes of eggplant were evaluated for field resistance during 2006 against major insect pests namely, shoot and fruit borer, Leucinodes orbonalis (Guenee), whitefly, Bemisia tabaci (Gennadius), leafhopper, Amrasca biguttula biguttula(Ishida)and lace wing bug, Urentius sentis Distant. On the basis of mean number of sucking insect pests at peak infestation period, three resistant (PB–64, Ganaur and Pb Barasati), three moderately resistant (Pb. Jamunigola, Sel-4 and HLB–12), three susceptible (BB–102, CH–157–16–4 and H– 19–3) along with two check genotypes (Hisar Pragati and CH–157–16–4) were selected for elaborate studies. Similarly the genotypes were classified based on infestation level of fruits by shoot and fruit borer on number basis as one tolerant (HLB–12), two susceptible (NDB–28–2 and BB–46), five highly susceptible (BB–102, APAU–4, Sel–4, BB–16–3 and (H–157–16–4) and two check genotypes (Hisar Pragati and BR–112). The resistant genotypes harboured significantly (p=0.05) less population of leafhopper (1.5 to 2.0 nymphs/leaf), whitefly (1.1 to 1.5 adults/leaf) and lace wing bug (1.4 to 1.8 nymphs and adults/leaf) than the susceptible genotypes manifesting 5.0 to 5.5 leafhopper/leaf, 4.9 to 5.1 whitefly/leaf and 2.3 to 2.5 lace wing bug/leaf at the peak infestation period. Similarly the tolerant genotype HLB-12 exhibited significantly (p=0.05) less (29 %) fruit damage by shoot and fruit borer than the highly susceptible genotypes (42.00 to 61.50 % fruit damage). -ii- The impact of trichome density on leafhopper (r = –0.84), whitefly (r = – 0.90) and lace wing bug (r = –0.62) was negative and significant. However, except leafhopper where the trichome length (r = –0.62), had shown negative and significant correlation with nymph population, the impact of trichome length was non-significant with whitefly and lace wing bug incidence. Correlation of thickness of pericarp (r = 0.80) and mesocarp (r = 0.70) were positive and significant, while the impact of fruit length was non-significant with the incidence of shoot and fruit borer. Among phytochemicals in leaves, moisture, crude protein, total sugars, nitrogen contents were positive and significant while phenols were negative and significant with the incidence of leafhopper and whitefly. Among phytochemicals in fruits, moisture (r = 0.89 ), crude protein (r = 0.68), nitrogen (r = 0.69) contents were positive and significant while total sugars (r = -0.67), fiber (r = -0.76), tannin (r = - 0.85) and phenol (r = -0.80) contents were negative and significant with per cent fruit infestation by shoot and fruit borer. Mineral constituents showed marginal effects on the incidence of sucking insect pests and shoot and fruit borer.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/87032
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomology
dc.subjectEggplant, Shoot and fruit borer, Leafhopper, Whitefly, Lace wing bugen_US
dc.these.typeM.Sc
dc.titleEvaluation of eggplant (Solanum melongena L.) genotypes for field resistance against major insect pestsen_US
dc.typeThesisen_US
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