PODBORER COMPLEX IN PIGEONPEA (Cajanus cajan (L.) Millsp.,) GENOTYPES AND THEIR MANAGEMENT WITH BIORATIONAL INSECTICIDES
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Date
2010
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY
Abstract
Studies on “Pod borer complex in pigeonpea (Cajanus cajan (L.)
Millsp.,) genotypes and their management with bio-rational insecticides”
were undertaken during Kharif 2009-2010 at Regional Agricultural Research
Station, Lam, Guntur. Twenty five genotypes of pigeonpea were selected for
screening and replicated thrice in a Simple Randomized Block Design.
The evaluation of different genotypes against the pod borer complex under
field conditions revealed that the genotypes LRG-30 (4.85%), WRP 1-2 (5.26%),
TAT-96-29 (6.36%), SM-9 (6.48%), GPM-43(6.56%) and BSMR 737 (6.76%)
were on par with each other with respect to the inflorescence damage due to
Maruca vitrata (Geyer).
The least pod damage due to M. vitrata was recorded in SM-54 (7.7%)
followed by NSM-166 (9.56%), 8-1 (9.65%), SM-58 (10.02%), CHILAKA-1
(10.16%), PERINAL-1 (11.55%) and WRG-150 (12.58%) among 25 genotypes
screened.
Among 25 genotypes screened, the lowest pod damage due to
Melanagromyza obtusa (Malloch) was recorded in SM-54 (6.15%), followed by
MAHANADI-1 (6.23%), SM-114 (9.10%), JSM-8 (9.40%), and WRG-150
(9.92%).
Among 25 genotypes screened, significantly lowest pod damage due to
Helicoverpa armigera (Hubner) was recorded in PERINAL-1 (11.53%) and
WRG-150 (12.85%).
Among the entries evaluated, CHILAKA-1 recorded the highest yield of
866.66 g/5m length which was followed by LRG-30 (850.00 g/5m) and WRG-150
(818.33 g/5m).
Among seven bio-rational insecticides evaluated for their efficacy against
pod borer complex, treatments like Bacillus thuringiensis (Ber.) @ 2 ml/l and
NSKE @ 5% and the chemical check chlorpyriphos + dichlorvos @ 2.5 + 1 ml/l
were effective in suppressing the inflorescence damage. Next effective
treatments were Verticillium sp (Zimmermann) Viegas @ 5g/l, Metarrhizium
anisopliae (Metch.) Sorokin @ 5g/l, Heterosternma indica (Mclichar) @ 30 lakh
nematodes/l, Beauveria bassiana (Balsamo) Vuillemin @ 5g/l and Nomuraea
rileyi (Farlow) Samson @ 5g/l. Bt @ 2ml/lt and NSKE 5% were on par with
each other with least pod damage by M. vitrata
H. armigera (2.94% and
respectively.
2.97%)
(7.09% and 7.48%),
and M. obtusa (5.43 % and 7.31%),
The chemical check chlorpyriphos + dichlorvos @ 2.5 + 1ml/l which
recorded 41.26% inflorescence damage and 6.76, 2.09 and 4.25 per cent pod
damage due to M. vitrata, H. armigera and M. obtusa, respectively and was
significantly superior over other treatments.
Among the bio-rational insecticides the highest yield was recorded in Bt @
2 ml/l (999.87 Kg/ha) followed by NSKE 5% (955.53 Kg/ha) with 102.23 and
93.25 % increase over control. The highest yield was recorded by the chemical
check chlorpyriphos + dichlorvos @ 2.5 + 1ml/l (1263.67 Kg/ha) with 155.58 %
increase over control and significantly superior over other treatments.
Description
Keywords
weeds, control methods, drying, sowing, yields, developmental stages, herbicides, crops, grasses, harvesting, PIGEONPEA, (Cajanus cajan (L.) Millsp.,), BIORATIONAL, INSECTICIDES”