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20201
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Subject: Entomology × Author: Jai Parkash × End date: 2020 × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Status of insect pests on cucurbits and bio-ecological management of melon fruit fly on bottle gourd in South-West Haryana
    (CCSHAU,HiSAR, 2020-06) Jai Parkash; Balbir Singh
    The present studies entitled “Status of insect pests on cucurbits and bio-ecological management of melon fruit fly on bottle gourd in South-West Haryana” were carried out during zaid and kharif, 2019 at CCSHAU Regional Research Station, Bawal. Bactrocera cucurbitae and Aulacophora foveicollis were observed as the major insect pests of different cucurbitaceous crops in Rewari and Mahendragarh districts of Haryana. Fruit infestation by fruit fly was started with fruit setting and was higher in rainy season crops than summer crops. During survey, the incidence of red pumpkin beetle was noticed from March to May in summer season and from August to October in kharif season. The red pumpkin beetle damaged the crops at all stages being at peak in second fortnight of April. In addition, eleven minor insect pests were also observed at farmer’s field during the survey. Study on seasonal incidence revealed that the fruit infestation by melon fruit fly was started in 34th SMW and was significant and positively correlated with evening relative humidity and rainfall. Maximum infestation was noticed in 36th SMW with 49.75 per cent fruit damage in bottle gourd. The red pumpkin beetle infestation in bottle gourd was noticed from 31st SMW and peak infestation reached in 38th SMW with an average population of 52.33 beetles per five plants. Red pumpkin beetle was negatively correlated with all abiotic factors and was significantly correlated with minimum temperature and evening relative humidity. Aphid and whitefly were also found negatively correlated with all abiotic factors except maximum temperature. Further, the aphid population was significantly correlated with minimum temperature, evening relative humidity and rainfall whereas whitefly population was significantly correlated with evening relative humidity and rainfall. The efficacy of bio-ecological molecules evaluated against melon fruit fly showed that treatment of Malathion 50EC (1 ml/l) + jaggery (3 g/l) was most effective which caused highest reduction in per cent fruit infestation and produce maximum marketable fruit yield over other treatments.