Studies on Population Dynamics and Management of Defoliator Insect-Pests on Soybean [Glycine max (L.) Merrill] in South-Eastern Rajasthan
Loading...
Date
2020-09-04
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
COLLEGE OF AGRICULTURE, UMMEDGANJ, KOTA
Abstract
The present investigation entitled “Studies on Population Dynamics and
Management of Defoliator Insect–Pests on Soybean [Glycine max (L.) Merrill] in
South-Eastern Rajasthan” was conducted at experimental farm, Agricultural
Research Station, Ummedganj, Kota (Rajasthan) during kharif 2019.
Population dynamics of defoliator insect-pests on five promising varieties of
soybean (RKS-24, RKS-45, RKS-113, JS-335 and JS 97-52) revealed that none of the
variety was found free from infestation of defoliators, however larval infestation trend
was observed in this order JS-335 > JS 97-52 > RKS-113 > RKS-24 > RKS-45. The
peak larval population was foundin all the varieties evaluated as green semilooper and
bihar hairy caterpillar during 34th SMW, pod borer during 36th SMW and tobacco
caterpillar during 38th SMW.
All treatments were found significantly superior in reducing the larval
population of defoliators viz., tobacco caterpillar, green semilooper, pod borer and
bihar hairy caterpillar as compared to control. The treatment of Chlorantraniliprole
18.5 SC @ 150 ml/ha was found most effective with minimum larval population of
defoliators followed by Indoxacarb 14.5 SC @ 333 ml/ha.
Higher seed yield of soybean (1952.4 kg/ha) was recorded in the treatment of
Chlorantraniliprole 18.5 SC @ 150 ml/ha followed by Indoxacarb 14.5 SC @ 333
ml/ha (1904.8 kg/ha) and Triazophos 40 EC @ 800 ml/ha (1873.0 kg/ha). Maximum
additional yield over control (492.1 kg/ha), avoidable yield loss (25.20 per cent) and
net return (Rs. 14814.6/ha) was recorded in the treatment of Chlorantraniliprole 18.5
SC @ 150 ml/ha. It is concluded that the treatment of Chlorantraniliprole 18.5 SC @
150 ml/ha was found most effective against defoliators and next best were Indoxacarb
14.5 SC @ 333 ml/ha and Triazophos 40 EC @ 800 ml/ha.
Description
Studies on Population Dynamics and Management of Defoliator Insect-Pests on Soybean [Glycine max (L.) Merrill] in South-Eastern Rajasthan