Blake; Aristolochia chanpionii and Cymbopogon citrate, IIPC were 0.048, 0.141, 0.244, 0.295 respectively, the result of deterrent the egg laying of tabacco whitefly was above 70% .

• Blake、马兜铃Aristolochia chanpionii、香茅Cymbopogon citratus Stapf.；的IIPC值分别为0