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Bioecology and Management of Pigeonpea Pod Fly, Melanagromyza obtusa (Malloch)

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Title Bioecology and Management of Pigeonpea Pod Fly, Melanagromyza obtusa (Malloch)
 
Creator Saidappa S.M
 
Contributor B.S. Nandihalli
 
Subject Agricultural Entomology
 
Description The investigations were carried out on bioecology and management of pigeonpea pod
fly, Melanagromyza obtusa (Malloch) at Agricultural College, Bijapur, UAS, Dharwad,
Karnataka during 2011-12.
The rowing survey conducted in five taluks of Bijapur district indicated that the
maximum per cent of pod and seed damages was noticed in Biijapur (73.40% and 33.00%,
respectively) followed by Muddebihal, Sindagi and Indi and least pod damage was observed
in Basavana Bagewadi (48.00% and 28.00%, respectively). The surveillance of the pod fly
revealed that the pod damage of 21.00 per cent was noticed at 20 week after sowing (WAS)
and the pod damage gradually increased reaching peak of 97.00 per cent at harvesting stage
(28 WAS). Among five genotypes screened, TS 3R and Gulyal Local recorded the less
incidence of pod fly damage. The higher yield was harvested from TS 3R (5.55 q/ha) and
Asha (5.09 q/ha). TS 3R and Gulyal local were resistant to pod fly due to presence of high
phenol and trichome density.
The egg, maggot and pupae of pod fly lasted for 3.04 + 1.14, 10.28 + 1.57 and 8.96 +
2.30 days, respectively. The mean duration male adult fly was 3.00 + 0.87 days and female
adult fly was 2.96 + 1.14 days. The average fecundity was 13.96 + 6.77 eggs per female. The
mean duration of total life cycle of male and female pod fly were 23.44 + 2.62 and 24.04 +
3.32 days, respectively. The reproductive life table of M. obtusa revealed that the net
reproductive rate (Ro) of 4.29, finite rate of increase (l) was 1.207 female/day, intrinsic rate
of increase of 0.081 and the corrected generation time (T) was 23.11 days.
Profenophos 50 EC + dichlorvos 76 EC (2.0 ml+0.5 ml/l) was significantly superior
by recording lower pod and seed damage with higher yield (8.70 q/ha) and net profit (Rs.
5800.72) followed by acephate 75 SP + dichlorvos 76 EC, acetamiprid 20 SP + dichlorvos 76
EC and imidacloprid 17.8 SL + dichlorvos 76 EC.
 
Date 2016-11-21T18:44:59Z
2016-11-21T18:44:59Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/86836
 
Format application/pdf
 
Publisher UAS, Dharwad