Incidence and Management of Major Insect Pests of Green Gram [Vigna radiata (L.) Wilczek]
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Date
2014
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Publisher
MPUAT, Udaipur
Abstract
The investigation on “Incidence and management of major insect pests of Green
gram [Vigna radiata (L.) Wilczek]” was conducted at Instructional Farm, Rajasthan
College of Agriculture, Udaipur during kharif 2013.
The population of aphid Aphis craccivora (Koch), jassid Amrasca kerri (Pruthi),
whitefly Bemisia tabaci (Genn.), blister beetle Mylabris pustulata (Thunberg) and pod
borer, Helicoverpa armigera (Hubner) were recorded in green gram crop throughout the
growing season. The incidence of aphid, jassid and whitefly were commenced in the last
week of July. While the incidence of blister beetle and pod borer commenced in fourth
week and third week of August, respectively. The population of aphid, jassid, whitefly,
blister beetle and pod borer attained its peak during second week of August, first week of
September, third week of August, first week of September and second week of
September, respectively. The aphid, jassid and blister beetle exhibited a negative
correlation with temperature and rainfall. While relative humidity exhibited positive
correlation between aphid and jassid and negative correlation with blister beetle. The
whitefly and pod borer showed positive correlation with temperature and negative
correlation with rainfall and humidity. The damage of pods by H. armigera were started
in the fourth week of August. The highest pod damage was recorded in the second week
of September.
Among different treatments tested, imidacloprid 17.8 SL @ 150ml/ha caused
maximum reduction in population of aphids followed by thiamethoxam 25 WG @
100gm/ha. In case of jassids and whiteflies, thiamethoxam 25 WG @ 100gm/ha caused
maximum reduction in population and was found significantly superior over other
treatments followed by imidacloprid 17.8 SL @ 150ml/ha and spiromesifen 240 SC @
500ml/ha, respectively. The flubendiamide 480 SC @ 150 ml/ha caused significant
maximum reduction of H. armigera larvae and it was followed by, quinalphos 25 EC @
0.04% and HaNPV @ 250 LE/ha. The highest seed yield 14.09 q/ha was recorded in case
of treatment schedule comprising spray of neem oil 2% at 20 DAG followed by spray of
flubendiamide 480 SC @ 150 ml/ha at flowering and pod formation stage.
Description
Incidence and Management of Major Insect Pests of
Green Gram [Vigna radiata (L.) Wilczek]
Keywords
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Citation
Jain and Ameta, 2014