Succession and management of major sucking insect pests on cucumber under polyhouse condition
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Date
2020
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DRPCAU, Pusa
Abstract
In order to study the succession and management of major sucking insect pests on cucumber under polyhouse condition through pest monitoring and relative efficacy of insecticides, a field experiment was carried out under the agro-climatic conditions of the North Bihar during late Kharif season 2019 at experimental farm (Hi-Tech Horticulture unit) of Dr. Rajendra Prasad Central Agricultural University, Pusa, in the district Samastipur of Bihar. Results pertaining to different aspects of the present investigation viz., succession of insect pests on cucumber and effect of different insecticidal treatments used for the management of major sucking insect pests of cucumber crop have been abstracted below:
Studies on succession of insect pests on cucumber under polyhouse condition reviles that, insects which are observed during investigation are whiteflies Bemisia tabaci Gennadius: (Alyrodidae: Hemiptera), thrips Thrips tabaci Lindquist: (Thripidae: Thysanoptera), aphids Aphis gossypii Glover: (Aphididae: Hemiptera) and cucumber moth Diaphania indica Saunders: (Crambidae: Lepidoptera). Whiteflies were found on the crop during the crop age of 15 days (during 39th SMW) i.e. during vegetative stage and they are observed up to the maturity stage of the crop. Thrips were also appeared at vegetative stage (during 40th SMW) during the crop age of 18 days and they are found up to the end of crop stage i.e. 24th November 2019.
Cucumber moth was emerged as epidemic pests under polyhouse condition when the crop was at vegetative stage (during 40th SMW) and found in all the stages of the crop i.e. vegetative stage, reproductive stage and maturity stage. The pest was appeared till the end of crop stage i.e. 24th November 2019. Aphids were found on the crop when crop is having an age of 18 days (during 40th SMW) i.e. during vegetative stage and they are observed till reproductive stage of the crop under polyhouse condition.
Among different insecticides tested against sucking insect pests of cucumber T3 (Lecanicillium lecanii @5g/lt (1x108 CFU) followed by T1 (Beauveria bassiana @5g/lt (1x108 CFU) found to be more effective against whiteflies, Bemisia tabaci Gennadius on cucumber under polyhouse conditions. T4 (Paecilomyces lilacinus @2kg/ha (1x108 CFU) followed by T3 (Lecanicillium lecanii @5g/lt (1x108 CFU) showed more effective in managing the thrips Thrips tabaci Lindquist population on cucumber under polyhouse conditions. T3 (Lecanicillium lecanii @5g/lt (1x108 CFU) followed by T2 (Metarhizium anisopliae @5g/lt (1x108 CFU) found to be more effective in managing the aphids Aphis gossypii Glover population on cucumber under polyhouse conditions.