POPULATION DYNAMICS, AVOIDABLE LOSSES AND MANAGEMENT OF PINK STEM BORER, Sesamia inferens WALKER INFESTING durum WHEAT
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Date
2019
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DEPARTMENT OF AGRICULTURAL ENTOMOLOGY B. A. COLLEGE OF AGRICULTURE ANAND AGRICULTURAL UNIVERSITY ANAND
Abstract
Investigations on population dynamics, avoidable losses, varietal screening of
pink stem borer, S. inferens infesting durum wheat and evaluation of different
insecticides against S. inferens through spraying, seed treatment and soil application
were carried out at Agricultural Research Station, Anand Agricultural University,
Arnej during November, 2017 to February, 2018.
The activity of pink stem borer larva(e) was started from 3rd week of
December i.e., 51st SMW (2 larvae/10 damaged tillers) and fluctuated during crop
period. During the 2nd week of January, 2018 (2nd SMW), it showed its peak by
recording 27 larvae/ 10 damaged tillers. The pupa(e) of pink stem borer was observed
from 4th week of December i.e., 52nd SMW (1 pupa/10 damaged tillers) and fluctuated
during crop period. During the 2nd week of January, 2018 (2nd SMW), it showed its
peak by recording 5 pupae/ 10 damaged tillers. The incidence of pink stem borer in
wheat commenced from 3rd week to December i.e., 51st SMW (0.59%) and fluctuated
during crop period. During 4th week of January, 2018 (4th SMW), it showed its peak
by recording 15.26 per cent dead heart.