直到1980年，只有其中的一种病毒被注册作为一种抑制剂，是一种植物松毛虫细胞质多面体病毒。
Until 1980 only one of these viruses was registered as a control agent, a CPV of the pine caterpillar Dendrolimus spectabilis.
一旦被毛虫摄入，晶体就会溶解，释放出病毒感染昆虫的细胞。
Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells.
从CroV病毒的全称可以看出，它的宿主是海洋微型异养鞭毛虫(Cafeteria roenbergensis)——一种直到1988年才发现的单细胞浮游生物。
CroV, as its full name suggests, is a parasite of Cafeteria roenbergensis, a single-celled planktonic organism that was itself discovered only in 1988.
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