Estimation of Losses along with Insecticidal Management of Shoot and Fruit borer (Leucinodes orbonalis G.) in Brinjal (Solanum melongena L.)
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Date
2008
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Publisher
MPUAT, Udaipur
Abstract
Investigations on “Estimation of losses along with insecticidal management
of shoot and fruit borer (Leucinodes orbonalis G.) in brinjal (Solanum melongena
L.)” were carried out at the Agronomy Farm and Department of Agricultural Zoology
and Entomology, Rajasthan College of Agriculture, Udaipur in kharif 2009.
The major insect pests significantly reduced the number of leaves, plant height
and marketable yield of fruits. The average yield of brinjal fruits obtained in protected
and unprotected plots were 141.87 q/ha and 103.90 q/ha, respectively, which brought
about 26.72 per cent losses in marketable yield of brinjal fruits. The relative toxicity
of different insecticides, evaluated against shoot and fruit borer was superior to
control. Beta-cyfluthrin + imidacloprid @ 15.75 + 36.75 g a.i./ha was the most
effective, which recorded 5.12, 6.15 and 7.15 per cent damage (on weight basis) at 7,
14 and 21 days after I spray and 5.30, 6.32 and 7.52 per cent damage (on weight
basis) at 7, 14 and 21 days after II spray. The least effective treatment was
imidacloprid @ 42 g a.i./ha that recorded 19.50, 20.50 and 20.42 per cent damage
(on weight basis) at 7, 14 and 21 days after I spray and 20.40, 21.45 and 22.80
per cent damage (on weight basis) at 7, 14 and 21 days after II spray. Analogous
observation were obtained for the data on number basis (I and II spray). No visual
phytotoxic symptoms on brinjal plants due to insecticidal treatments were noted.
Description
Estimation of Losses along with Insecticidal Management of Shoot and Fruit borer (Leucinodes orbonalis G.) in Brinjal (Solanum melongena L.)
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Citation
Koli and Srivastava, 2009