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梨黑斑病是杭州市梨树上一种严重的病害,1968年至1970年大观山果园梨是二十世纪品种,由于发生黑斑病,造成大量裂果及早期落果,以致连续三年烂果率达90％以上,每年减产15万斤左右。二十世纪是日本梨系统中品质最优良的一个品种,在外销上很受欢迎。我们遵照伟大领袖毛主席“抓革命,促生产”的教导,贯彻执行毛主席“发展经济,保障供给”的伟大方针,为探求梨黑斑病害防治的有效措施。去年曾进行梨黑斑病的药剂防治试验。供试验的二十世纪梨树246株,分六个小区,分别喷用六种药剂。各小区在3月27日均
Pear Blight is a serious disease on the pear tree in Hangzhou City. From 1968 to 1970, the Orchard Pear in Dashangshan Mountain is a 20th-century variety. As a result of the occurrence of black spot disease, a large number of fruit cracking and early decay were caused, resulting in three years of rotten fruit Rate of more than 90%, annual reduction of about 150,000 pounds. The twentieth century is Japan’s pear system of the best quality of a species, very popular in the export. In accordance with the teachings of Chairman Mao, the great leader, “grasping the revolution and promoting production,” we have implemented the great principle of “developing the economy and ensuring the supply” of Chairman Mao to find effective measures for the prevention and control of pear spot disease. Last year, Pear Blight disease prevention and control of pharmaceutical experiments. For the test of the 20th century 246 pear trees, divided into six districts, spraying six kinds of agents, respectively. The district on March 27 are