Efficacy of pyrethroids against powder post beetles attack on fuelwood
Efficacy of pyrethroids against powder post beetles attack on fuelwood
Hanif Gul and M. Ismail Chaudhry
ABSTRACT
Shisham fuel wood stacks of 1.40 m3 (50 cft) each free
of attack of powder post beetles were first sprayed with
pyrethroids perigen (permethrin) 10% EC, cypermethrin
10 EC in doses of 0.01, 0.02, 0.04 and cislin
(deltamethrin) 2.5% in doses of 0.01, 0.02 and
0.04% Dieldrin 20% EC in 0.5% dose was used as standard
for comparison along with check (no treatment). Half of
the stacks were sprayed for the second time, three
months after first spray with the same insecticides in
same doses. Observations recorded in December, 1991
showed that permethrin gave 88% protection in two sprays
in 0.04% and cislin (deltamethrin) 0.04% afforded 100
and 95% protection, respectively, in two sprays. Dieldrin
afforded 83% protection in 0.5% dose whereas no billet
escaped in control treatment.
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December 1991
Vol. 41, Iss. 4
