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当前位置: 首页 > 文章 > 有機汞粉剂防治馬鈴薯晚疫病試驗 植物病理学报 1958 (1) 81-86
Position: Home > Articles > EXPERIMENTS ON THE CONTROL OF POTATO LATE BLIGHT BY ORGANIC MERCURIAL DUSTS Acta Phytopathologica Sinica 1958 (1) 81-86

有機汞粉剂防治馬鈴薯晚疫病試驗

作  者：
王道本;黄河
单  位：
河北省沙嶺子农业試驗站
摘  要：
两年来用有机汞消石灰混合粉防治馬鈴薯晚疫病的田間試驗获得了显著的效果。在发生中心病株时开始用1:9西力生消石灰或賽力散消石灰每7天撒佈1次,共撒4—5次可以大大地抑制病害的蔓延,从而提高产量。西力生和賽力散的防病效果相近。填充剂的比較上,滑石粉远逊于消石灰。石灰的鈣素或碱性不影响汞化物的杀菌力。抑制孢子囊萌发的有效浓度的室內测定,得到的抑菌力強度順序为西力生(折成氯化乙基汞)>賽力散(折成醋酸苯汞)>硫酸銅。LD50各为0.02、0.058、0.15 ppm。温室接种試驗指出有机汞粉剂經水冲洗后防病作用下降。
译  名：
EXPERIMENTS ON THE CONTROL OF POTATO LATE BLIGHT BY ORGANIC MERCURIAL DUSTS
作  者：
T. P. WANG AND H. HWANG(Salingtze Agricultural Experiment Station, Hopeh; Institute of Applied Mycology, Academia Sinica)
摘  要：
Field experiments have been carried out in the past two years on the control of the potato late blight by dusting with a mixture of organic mercurial and hydrated lime. Started soon after the appearance of disease loci, dusting with the mixture of 1 part Seresan (2% ethyl mercuric chloride) and 9 parts hydrated lime or the same ratio of Ceresan (2.58% phenyl mercuric acetate) and hydrated lime, 5 times at 7 days interval, gave remarkable control of disease and increase in yield. As diluent, talc powder is much inferior to the hydrated lime in field performance. Laboratory test of sporangium germination by Petri dish method have shown, however, that neither calcium ion nor hydroxyl ion influence the toxicity of mercurials. The role of lime in the control of potato late blight by the dust mixture must be sought from a different angle. LD50 of ethyl mercuric chloride, phenyl mercuric acetate and copper sulfate for the sporangia of Phytophthora infestans have been found to be 0.02, 0.058 and 0.15 ppm respectively.

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