According to observation on harmful characteristics of main forest insect pest, control measures have been put forward.

并对主要林木害虫的危害特点进行了观察，提出了防治策略。

youdao

According to observation on harmful characteristics of main forest insect pest, control measures have been put forward.

并对主要林木害虫的危害特点进行了观察，提出了防治策略。

youdao