MANAGEMENT OF SOYBEAN POD BORER, Cydia ptychora (Meyrick) (Tortricidae : Lepidoptera)
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Date
2001-08-06
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
Investigations on different aspects of management on soybean pod borer
C. ptychora were undertaken at the Main Research Station and the Department
of Agricultural Entomology, University of Agricultural Sciences, Dharwad during
1999-2000. The studies included the seasonal incidence, crop loss estimation
and testing the efficacy of bioagents and plant products against C. ptychora
under field conditions.
The study on seasonal incidence revealed that the population of C.
ptychora on soybean was at its peak on the crop sown during the first fortnight
of July, which recorded highest per cent (79.22) pod damage. However decline
in the pest population was observed on subsequent sowings.
The loss in yield of soybean due to C. ptychora was assessed by
chemically protecting the crop during its different growth stages The probable
loss due to the pod borer as computed by comparing the yield obtained from
the treatment completely protected plot with untreated check was to the extent
of 62.06 per cent.
Investigations on the efficacy of bioagents and plant products revealed
that the bioagent B. thuringiensis and plant product neem seed kernel extract
were the next best treatments to monocrotophos a standard check.
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