Queensland Institute of Medical Research, Brisbane, Australia.
Am J Trop Med Hyg. 2012 Apr;86(4):656-64. doi: 10.4269/ajtmh.2012.11-0455.
The fungus Beauveria bassiana reduces Aedes aegypti longevity in laboratory conditions, but effects on survival, blood-feeding behavior, and fecundity in realistic environmental conditions have not been tested. Adult, female Ae. aegypti infected with B. bassiana (FI-277) were monitored for blood-feeding success and fecundity in the laboratory. Fungal infection reduced mosquito-human contact by 30%. Fecundity was reduced by (mean ± SD) 29.3 ± 8.6 eggs per female per lifetime in the laboratory; egg batch size and viability were unaffected. Mosquito survival, blood-feeding behavior, and fecundity were also tested in 5 meter × 7 meter × 4 meter semi-field cages in northern Queensland, Australia. Fungal infection reduced mosquito survival in semi-field conditions by 59-95% in large cages compared with 61-69% in small cages. One semi-field cage trial demonstrated 80% reduction in blood-feeding; a second trial showed no significant effect. Infection did not affect fecundity in large cages. Beauveria bassiana can kill and may reduce biting of Ae. aegypti in semi-field conditions and in the laboratory. These results further support the use of B. bassiana as a potential biocontrol agent against Ae. aegypti.
球孢白僵菌可降低实验室条件下埃及伊蚊的寿命，但在现实环境条件下对其生存、吸血行为和繁殖力的影响尚未得到测试。感染了球孢白僵菌（FI-277）的成年雌性埃及伊蚊在实验室中监测其吸血成功率和繁殖力。真菌感染使蚊子与人类的接触减少了 30%。在实验室中，真菌感染使雌性蚊子的终生产卵量减少了（平均值±标准差）29.3±8.6 个；卵批大小和活力不受影响。在澳大利亚昆士兰州北部的 5 米×7 米×4 米半野外笼中也测试了蚊子的生存、吸血行为和繁殖力。与小笼子相比，真菌感染使大笼子中的蚊子在半野外条件下的存活率降低了 59-95%。一项半野外笼试验显示，吸血率降低了 80%；第二项试验显示没有显著影响。感染对大笼子中的繁殖力没有影响。球孢白僵菌可杀死埃及伊蚊，并可能减少其在半野外条件和实验室中的叮咬。这些结果进一步支持将球孢白僵菌用作埃及伊蚊的潜在生物控制剂。
