Management of insect pest complex of Tomato with combination insecticides
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Date
2021-07-30
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ANDUAT, Kumarganj, Ayodhya
Abstract
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.
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