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Author: BASAVARAJU, S. ×

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    ThesisItemOpen Access
    MANAGEMENT OF FOREST NURSERY INSECT PESTS USING ENTOMOPATHOGENS
    (Keladi Shivappa Nayaka University Agricultural and Horticultural Science (COF,PONNAMPET), 2020-11-15) BASAVARAJU, S.; Dr. R. N. KENCHARADDI; Dr. C. G. KUSHALAPPA
    The present investigation with objectives of recording forest nursery pests, entomopathogens on them and managing them with use of entomopathogens was carried out at three different nurseries in Kodagu, during 2019-20. Ceroplastes rubens on Garcinia gummi-gutta and G. indica; Rusostigma eugenie and a mealy bug on Syzygium cumini at Forestry college nursery; Arytaina sp. on Pterocarpus marsupium, Trioza sp. on Terminalia arjuna at Forest nursery, Sampaje and Trioza sp. on T. bellirica, Aleurothrixes floccosus on Psidium guajava, Trioza sp. on T. arjuna, Dasynus sp. on Melia dubia at Forest nursery Thitimati were the insect pests recorded at medium to high levels of infestation. Other 24 species of insects occurred on other species of forest seedlings with low incidence. The occurrence of insect pest had a positive correlation with temperature and negative with RH and rainfall in majority of the insect pests. Natural occurrence of Beauvaria bassiana was observed and isolated from C. rubens and R. eugenie infesting Garcinia and guava seedlings, respectively. The occurrence of braconid parasitoids were recorded from Ascotis selenaria and from an unidentified hairy caterpillar. botanicals Among the entomopathogens and tested, B. bassiana 2 x 10 cfu/g @ 2g/l and Azadirachtin 0.03%EC @ 2ml/ 1 (61.10% reduction) against pink scales; B. bassiana 2 x 108 spores/ml @ 2ml/l and M. anisopliae 2 x 108 cfu/g @ 2g/l, Isaria fumosorosea 2 x 108 spores/ml @ 2ml/l against whitefly nymphs and highly effective. But other entomopathogens stood with on par Azadirachtin was effective initially; entomopathogens were superior at 14 and 21 DAT. The total cost of plant protection was highest (Rs. 71/ bed) in case of Azadirachtin, and lowest (Rs.54/ Bed) in fungal pathogens Lecanicillium lecanii and B. bassiana.
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    ThesisItemOpen Access
    MANAGEMENT OF FOREST NURSERY INSECT PESTS USING ENTOMOPATHOGENS
    (University of Agricultural and Horticultural Science, (C O F, Ponnampet), 2020-11-10) BASAVARAJU, S.; Dr. R. N. KENCHARADDI; Dr. C. G. KUSHALAPPA
    ABSTRACT The present investigation with objectives of recording forest nursery pests, entomopathogens on them and managing them with use of entomopathogens was carried out at three different nurseries in Kodagu, during 2019-20. Ceroplastes rubens on Garcinia gummi-gutta and G. indica; Rusostigma eugenie and a mealy bug on Syzygium cumini at Forestry college nursery; Arytaina sp. on Pterocarpus marsupium, Trioza sp. on Terminalia arjuna at Forest nursery, Sampaje and Trioza sp. on T. bellirica, Aleurothrixes floccosus on Psidium guajava, Trioza sp. on T. arjuna, Dasynus sp. on Melia dubia at Forest nursery Thitimati were the insect pests recorded at medium to high levels of infestation. Other 24 species of insects occurred on other species of forest seedlings with low incidence. The occurrence of insect pest had a positive correlation with temperature and negative with RH and rainfall in majority of the insect pests. Natural occurrence of Beauvaria bassiana was observed and isolated from C. rubens and R. eugenie infesting Garcinia and guava seedlings, respectively. The occurrence of braconid parasitoids were recorded from Ascotis selenaria and from an unidentified hairy caterpillar. Among the entomopathogens and botanicals tested, B. bassiana 2 x 108 cfu/g @ 2g/l and Azadirachtin 0.03%EC @ 2ml/ l (61.10% reduction) against pink scales; B. bassiana 2 x 108 spores/ml @ 2ml/l and M. anisopliae 2 x 108 cfu/g @ 2g/l, Isaria fumosorosea 2 x 108 spores/ml @ 2ml/l against whitefly nymphs and adults were highly effective. But other entomopathogens stood on par with them. Azadirachtin was effective initially; entomopathogens were superior at 14 and 21 DAT. The total cost of plant protection was highest (Rs. 71/ bed) in case of Azadirachtin, and lowest (Rs.54/ Bed) in fungal pathogens Lecanicillium lecanii and B. bassiana.