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Subject: Entomology × Author: Khan, Aslam × End date: 2020 × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Evaluation of brinjal genotypes against major insect pests and management of Leucinodes orbonalis
    (CCSHAU, Hisar, 2020) Khan, Aslam; Bhatnagar, Praduman
    Investigations were carried out on brinjal genotypes against major insect-pests and management of Leucinodes orbonalis during Kharif, 2019 at CCS HAU, Hisar. Results of evaluation of genotypes showed that the whitefly population was maximum and minimum on genotype HE-202-9 (4.21/ leaf) and HE-103-1 (3.48/ leaf) respectively. While, the maximum leafhopper population was recorded on genotype HE-202-9 (1.09/ leaf), and minimium from HE-101-4 (0.80/ leaf). While considering shoot damage, highest per cent was recorded in genotype BR-112 (18.60), while the lowest was recorded in genotype HE-101-3 (9.25). On overall basis, the most resistant genotype against shoot and fruit borer was HE-101-3, while the most susceptible genotypes were BR-112 and HE-202-9. Similarly with regards to fruit damage by shoot and fruit borer in different genotypes studied, the most resistant genotype was HE-101-3 (23.69), while the most susceptible were BR-112 (41.46) and HE-202-9 (39.02). In different genotypes, the length of leaf varied from 9.4 to 16.5 cm, however the maximum and minimum leaf length were recorded from genotype BR-112 (16.5 cm) and HE-209-1 (9.4cm) respectively. Similarly, the leaf width in different genotypes ranging from 4.7 to 13.6 cm. Fruit length among different genotype studied varied from 6.4 to 19.3cm, while the maximum fruit diameter of 7.9 and 7.4 cm was recorded in genotypes H-8 and BR 112, respectively while minimum were recorded from HE-101-3 (3.3 cm). Among different genotypes studied, the narrow, intermediate and wide pericarp thickness was reported from genotype HE-202-9 (0.40 cm), HE-210-1, HE-101-3 and HE-209-1 (0.48, 0.50 and 0.52 cm, respectively) and BR 112 (0.85 cm) respectively. The highest per cent fruit infestation was noticed in the genotypes BR 112 and H-8 having purple coloured fruits, while moderate fruit infestation was observed in genotype HE-202-9 having green purple fruits. The wide variation in fruit colour was noticed in genotypes HE-103-1. On shoot infestation basis, chlorantraniliprole 18.5 SC + spinosad 45 % SC was noted with lowest per cent shoot damage (6.33 %) and Bacillus thuringiensis 5 % WP + brahmastrawas with higher per cent shoot damage (13.47 %). On the basis of fruit infestation, efficacy of chlorantraniliprole 18.5 SC + spinosad 45 % SC was found to be most effective and nimbecidine 300 ppm + brahmastra were found to be least effective against shoot and fruit borer.The highest fruit yield (24.45tonnes/ ha) yield was obtained from chlorantraniliprole 18.5 SC + spinosad 45 % SC, while the lowest in case of treatment nimbecidine 300 ppm +brahmastra (13.55 tonnes/ ha).