Efficacy of Bafog-1 (S),formulated local Bacillus thuringiensis for controlling bagworm,Pteroma pendula (lepidoptera: psychidae)

A study on the efficacy of bafog-1 (s),a formulated,local strain of bacillus thuringiensis (bt) applied via fogging was carried out both in the laboratory and the field,against the bagworm species pteroma pendula. laboratory assay of bafog-1 (s) using five diferent treatments showed that the bafog-1 (s) at the highest dose of 2.36 x 1012 cfu ml-1 and ratio of bafog-1 (s):diesel;1:1 (v/v) killed as high as 78.6% p. pendula at seven days after treatment (dat). in field trials,the efectiveness of bafog-1 (s) in controlling the bagworm was compared with a commercial bt product. the field trial was conducted in an estate at hutan melintang,perak,covering a total area of 12 ha. based on a student's t-test,with one-tailed distribution,the total bagworm populations (larvae + pupae) in bafog-1 (s) and dipel es plots were significantly reduced (p<0.05) from 569 bagworms per frond (bpf) and 668 bpf at 0 dat to 266 bpf and 432 bpf at 14 dat,respectively. the results indicated that the eficacy of bafog-1 (s) was comparable to the commercial bt.