常見(jiàn)例句雙語(yǔ)例句The primary source of infection was the oospore overwintered in soil and plant survival.其主要侵染來(lái)源是土壤中和植物病殘?bào)w上越冬的卵孢子。Primary infection source may be reduced by breeding and selecting the variety with the lower infected seedling rate of seed-borne SMV.可以通過(guò)選育和篩選種傳病苗率低的品種推廣，減少本病的初次侵染來(lái)源。It is presumed that chlamydospore may be the major primary infection source of rice false smut and begin to infect the panicles of rice before or after florescence.一般認(rèn)為厚垣孢子是稻曲病主要的初侵染源，在水稻開(kāi)花前后從穗部進(jìn)行侵染；http://dict.cnki.net 返回 primary infection source