1. After exogenous MJA treatment, the variation of the terpene volatiles in the conelet and cone were the same as the infested conelcets and cones, but the varying extents were not very high.
   外源MJA处理后，与1年生和2年生受害球果挥发成分有类似的变化，但变化的程度要小得多。

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