Pipitgool V, Maleewong W, Daenseegaew W, Thaiklar K
Department of Parasitology, Faculty of Medicine, Khon Kaen University, Thailand.
Southeast Asian J Trop Med Public Health. 1991 Sep;22(3):426-8.
Laboratory bioassays using a preparation of Bacillus thuringiensis H-14 (Bt.H-14), namely Skeetal were conducted to determine their effectiveness against late 3rd/early 4th instar larvae of Aedes aegypti. The larvae were collected from municipal areas in 7 provinces, namely Burirum, Roi-Et, Khon Kaen, Ubol Ratchatani, Nakorn Phanom, Surin and Nakorn Ratchasima, in the Northeast of Thailand. It was found that for Skeetal, LC50 ranged from 128 to 151 nl/l (average 143) and LC90 ranged from 254 to 289 nl/l (average 275). The mortality rate of Ae. aegypti larvae in the 7 provinces did not differ significantly (p greater than 0.05) at a concentration of 300 nl/l. The result of the bioassays show that the preparation of Bt.H-14 is very effective against Ae. aegypti larvae in Northeast of Thailand and the mosquito larvae in the various areas were nearly equal in susceptibility to Bt.H-14.
使用苏云金芽孢杆菌H - 14（Bt.H - 14）制剂“斯凯特”进行了实验室生物测定，以确定其对埃及伊蚊3龄后期/4龄初期幼虫的有效性。这些幼虫采自泰国东北部7个省份的市区，分别是武里南、黎逸、孔敬、乌隆他尼、廊开、素林和呵叻。结果发现，对于“斯凯特”，半数致死浓度（LC50）范围为128至151纳升/升（平均143），而90%致死浓度（LC90）范围为254至289纳升/升（平均275）。在浓度为300纳升/升时，这7个省份的埃及伊蚊幼虫死亡率没有显著差异（p大于0.05）。生物测定结果表明，Bt.H - 14制剂对泰国东北部的埃及伊蚊幼虫非常有效，而且不同地区的蚊虫幼虫对Bt.H - 14的敏感性几乎相同。
