TY  - THES
TY  - BOOK
T1  - Effect of coumatetralyl on rat abundance and reduction in crop damage in rice field
A1  - Muhammad Hariz Ashaari.
LA  - English
YR  - 2015
UL  - http://discoverylib.upm.edu.my/discovery/Record/565929
AB  - ABSTRACT
The effect of coumatetralyl, a first generation anticoagulant rodenticide in controlling rats
was investigated in a rice-field area at Selinsing, Kelantan. Two plots were established;
one baited with coumatetralyl and other serve as rodenticide free plot. Three baiting
campaign were carried out; the first baiting was conducted ten days before transplanting;
the second, three weeks after transplanting and the third six weeks after the tillering
stage. The effects were evaluated based on two parameters, i.e. rat damage assessment
and rat abundance. Damage was estimated by counting the proportion of cut tillers at
tillering, booting and maturing stage. Rat abundance was indirectly compared by the
amount of bait taken in both treatments. Rat damage and abundance were calculated and
significance between means was established by unpaired t-test. Rodent activity measured
at prebaiting and on two occasions post baiting. Coumatetralyl significantly reduce rat
number by up to 61% based on the acceptance on plain bait measurement. This indicates
an approximate reduction of rat population density presumably due to mortality after
consumption of coumatetralyl baits. Incidence of rat damage in both control and
coumatetralyl plot was less than 5% at all rice plant growth stage. There was significance
different between the treatment and control plot for all stages of rice crop combined
(p<0.05). Damage recorded showed a marked increase from 2% to 4.26% for control and
0.24% to 0.88% for treatment plot at the booting and ripening stage respectively. The
mean percentage rat damage level for three growth stages in coumatetralyl baited and
control plot were 0.65% and 3.49% respectively, being significant different (p<0.05).
Mean damage at coumatetralyl baited plot remained less than 1% throughout. This
indicated that coumatetralyl was effective in suppressing rat number and thereby reduced
crop damage at all stages of rice growth.
CN  - FP 2015 12
ER  -