苏云金杆菌（BT）毒素及其应用(PPT 111页)

 苏云金杆菌（BT）毒素及其应用
1 What is Bacillus thuringiensis
1 苏云金杆菌是什么？
A rod-shaped (1.0-1.2 by 3-5 micron), gram-positive, facultative anaerobic, spore forming bacterium
杆状，大小为1.0-1.2 × 3-5 µm，革兰氏阳性，兼性嫌氧，产孢的细菌
菌体照片
A facultative pathogen of some insect species commonly used as a biopesticide.
一些昆虫的兼性病原物，常用作生物杀虫剂。
More than 150 insects belonging to the orders Lepidoptera, Diptera, and Coleoptera are known to be susceptible to Bt. To be effective, Bt must be eaten by insects during their feeding stage of development, when they are larvae. Bt is ineffective against adult insects. 
150种以上属于鳞翅目、双翅目、和鞘翅目的昆虫易感染Bt。 Bt要昆虫幼虫取食后才会发生效力，对成虫无效。

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