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试验分两个阶段进行,1974、1978、1979年主要明确病害不同流行年份秧田喷药的田间防效;1980年重点对秧田喷药在病害药剂防治中的地位进行初步探讨.供试品种有感病中秈金刚30号、南京11号、泗优3号等.试验区于秧苗三叶期采用“剪叶喷雾接菌法”进行人工接菌,菌株为ks—6—6,菌液浓度为3×18~8个/毫升.秧田喷药第一次在接菌后2天(秧苗三叶期),第二次在秧苗移栽前5天(秧苗四叶期).供试药剂有敌枯双、叶枯青等,秧田每亩喷药液100斤,大
The test was carried out in two stages. In 1974, 1978 and 1979, the main disease control effects were identified in the field of spraying seedlings in different epidemic years. In 1980, the priority was given to the position of seedling spraying in disease prevention and control. Soybean Medium Disease Indica-Sinomonte 30, Nanjing 11, Siyou 3, etc. The experimental area was inoculated by “leaf-cutting spray-inoculation method” in the triloba stage of the seedling, the strain was ks-6-6, 3 × 18 ~ 8 / ml. Seedling spray for the first time in 2 days after inoculation (seedling three-leaf stage), the second in the seedlings 5 days before transplanting (four-seedling stage) Dry double, leaf dry green, seedling spray liquid per acre 100 pounds, large