葡萄白腐病近年来为害日益严重,常使葡萄不能丰收。三年来试验研究与农民经验相结合共同制订的综合防治措施在京郊证明是有效的。在侵染来源的研究中,上年7月埋入上中31厘米之病残株,至翌年8月检查,能存活,用以接种的结果,发病率高达92%。病菌的孢子悬浮液与果皮上之分生孢子器放在土壤中,60天内都保持同等的致病能力。早期发病以下部果穗为多,越近土壤处发病愈多。7月7日检查1,033个果穗,有54个 Grape white rot disease in recent years increasingly serious damage, often unable to harvest grapes. The comprehensive prevention and control measures jointly formulated by experimental research and peasant experience over the past three years have proved effective in the suburbs of Beijing. In the study of the source of the infection, the diseased strain, which was embedded in the upper 31 cm in July last year, survived for examination in August of the following year and the incidence rate was as high as 92% as a result of inoculation. The spore suspension of bacteria and the pericarp of the conidia on the soil, 60 days to maintain the same pathogenic capacity. The earliest onset of the following part of the ear is more, the more recent onset of the soil more. There were 1,033 ears examined on July 7, 54