Studies on habitat ecology of field rodents and their management in groundnut, Arachis hypogaea L.
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Date
2013-08-21
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Abstract
The present investigation was conducted at Thagachuguppey
village, Magadi Taluk of Ramanagara District of Karnataka state.
Rodents were considered as a major vertebrate pest of groundnut.
Rodent species observed in groundnut field during the study were B.
bengalensis, T. indica, M. booduga, M. platythrix and B. indica in which
the B. bengalensis (41.91%) and T. indica (32.8%) were dominant and
the maximum population of rodents was recorded during harvesting
season. The study indicated that burrow characteristics like length of
the burrow, depth of the burrow, diameter of the openings and
tunnels, number of burrow openings and number of side tunnels
increases from germination to harvesting seasons irrespective of
rodent species. Hoarding materials like groundnut pods, ragi grains
and some weeds were quiet common in the burrows of B.bengalensis
and T. indica. However, Mus spp. and B. indica as observed do not
have hoarding habits. Litters were also observed in the burrows of all
species except in B. indica. Among the treatments tested for
management of rodents in groundnut found the best treatment was
2% Zn3P2 baiting at germination stage followed by Al2 (PO3)2
application in peg formation stage during Kharif season which give
82% reduction of rodents population and yield 1381kg/ha. Similarly
in summer season best treatment was 2% Zn3P2 baiting at germination
stage followed by Al2 (PO3)2 application in peg formation stage which
give 76% of reduction in rodent population and highest yield of
1351.33 kg/ha. The C:B ratio was highest with Zn3P2 (2%) baiting at
peg formation stage in both seasons, Kharif (1:38.12) and summer
(1:36.56).
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