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.