经卵传染频率较高。

The rate of transovarian transmission was high.

youdao

由于家蚕微粒子能经卵传染危害家蚕子代而被列为蚕种生产的唯一检疫对象，因此这一领域一直是蚕病学的研究重点和热点。

Because of this , it is quarantined in the silkworm egg production. Thus, this field has always been the focus and keypoint of the research on silkworm pathology.

youdao

由于家蚕微粒子能经卵传染危害家蚕子代而被列为蚕种生产的唯一检疫对象，因此这一领域一直是蚕病学的研究重点和热点。

Because of this , it is quarantined in the silkworm egg production. Thus, this field has always been the focus and keypoint of the research on silkworm pathology.

youdao