Abstract
Two tests were conducted to evaluate certain chemicals against Microtermes najdensis Harris when applied one week after or 5 days before transplanting green pepper. Treatment of the soil before transplanting proved more effective for damage suppression than after transplanting. The maximum reduction percentages over the check obtained in both cases were 21 and 31% respectively. The use of both dieldrin and chlordane has been now prohibited in Saudi Arabia, due to their high persistence and toxicity, and Scidco PLS and chloropyriphos T.C. are considered the best less-toxic and safer alternatives.