The primary source of infection was the oospore overwintered in soil and plant survival.
其主要侵染来源是土壤中和植物病残体上越冬的卵孢子。
Primary infection source may be reduced by breeding and selecting the variety with the lower infected seedling rate of seed-borne SMV.
可以通过选育和筛选种传病苗率低的品种推广，减少本病的初次侵染来源。
The main source of primary infection comes from hypha, akinetes and sclerotiums over-wintering in the bulb, residues of diseased plants and the soil.
病菌以菌丝体在种球内，或以菌丝体、厚垣袍子及菌核随病残体在土壤中越冬，成为翌年的主要初侵染源。
The main source of primary infection comes from hypha, akinetes and sclerotiums over-wintering in the bulb, residues of diseased plants and the soil.
病菌以菌丝体在种球内，或以菌丝体、厚垣袍子及菌核随病残体在土壤中越冬，成为翌年的主要初侵染源。
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