The volatile oil and its major component precocene Ⅱ not only had insecticidal efficacy,but also anti\|feeding effect and delayed molting of insects.
挥发油及其主要成分胜红蓟素不仅具有杀虫活性，而且引起昆虫拒食和延
。
The volatile oil and its major component precocene Ⅱ not only had insecticidal efficacy,but also anti\|feeding effect and delayed molting of insects.
挥发油及其主要成分胜红蓟素不仅具有杀虫活性，而且引起昆虫拒食和延。
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