The transovarial virus in 1st and 4th generations of congenital viruliferous insects can cause the second infection.
第1、4代经卵带毒虫还能分别引起早、晚稻再次侵染。
2
The transovarial virus in 1st and 4th generations of congenital viruliferous insects can cause the second infection on early and late rice respectively.