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Acharya Narendra Deva University of Agriculture & Technology, Ayodhya

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Author: Kumar, Shivam × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    Management of insect pest complex of Tomato with combination insecticides
    (ANDUAT, Kumarganj, Ayodhya, 2021-07-30) Kumar, Shivam; Singh, Sameer Kumar
    The present experiment entitled “Management of insect pest of complex of tomato with combination insecticides” revealed that the incidence of whitefly, Jassid, serpentine leaf miner and tomato fruit borer initiated after transplanting and persist till harvesting. The highest incidence of Whitefly was observed on tomato crop at 1st SMW (7.13/three leaves) and lowest 8th SMW (0.46/three leaves), Jassid 52th SMW(8.30/three leaves) and 8th SMW(0.03/three leaves). The highest incidence of Serpentine leaf miner at 1st SMW (7.10 mines/plant) and lowest 8th SMW (0.60 mines/plant) and Helicoverpa armigera at 4th SMW (3.50 larvae/plant) and 48th SMW (0.20 larvae /plant). Maximum and minimum temperature showed that negative non-significant correlation and morning relative humidity with whitefly, while the evening relative humidity, wind speed, sunshine showed that positive non-significant correlation with whitefly. the Jassid population showed negative significant correlation with maximum and minimum temperature, morning relative humidity and positive non-significant correlation with evening relative humidity, wind speed and sunshine. The serpentine leaf miner population showed the negative non-significant correlation with maximum and minimum temperature, morning relative humidity and positive non-significant correlation with evening relative humidity, wind speed and sunshine. The H. armigera showed the negative highly significant with maximum and minimum temperature, positive highly significant with evening relative humidity and positive non-significant correlation with morning relative humidity, wend speed and negative non-significant correlation with sunshine. Among the efficacy of certain combination insecticides, the treatment Betacyfluthrin 8.49% +Imidacloprid 19.81% OD @400ml/ha was observed most effective against whitefly, Jassid and serpentine leaf miner and least effective was Chlorpyriphos 50%+Cypermethrin5%EC@ 1000ml/ha against whitefly, Profenofos 40%+Cypermethrin 4%EC @1250ml/ha against Jassid and Triazophos 35%+ Deltamethrin 1% EC @ 1000ml/ha was least effective against serpentine leaf miner. The Chlorantraniliprole 10%+ Lambda cyhalothrin 5% ZC @ 250ml/ha was most effective against larval population and least effective was found Triazophos 35%+ Deltamehtrin1 % EC @ 100ml/ha. Followed by Imidacloprid40%+Fipronil40% WG @500g/ha, Imidacloprid 40%+Ethiprole 40% WG @ 500g/ha. The maximum yield 203.41 q/ha was found in Betacyfluthrin 8.49% +Imidacloprid 19.81% OD @400ml/ha and minimum yield 163.17 q/ha in Triazophos 35%+ Deltramethrin1% EC @ 1000ml/ha. The cost-benefit ratio 1:19.31 was highest recorded in Betacyfluthrin 8.49% +Imidacloprid 19.81% OD @400ml/ha and lowest 1:3.12 in Imidacloprid 40%+Ethiprole 40% WG @ 500g/ha.