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为了确切地掌握田间大豆蚜虫的发生量,更好地指导防治,于1984—1985年对大豆蚜虫进行了多点、多次的田间调查,确定了大豆蚜虫的分布型及形成原因,并列出相应的序贯抽样式和对照表。
In order to know the amount of soybean aphid in the field and to better guide the prevention and treatment, soybean aphid was investigated in 1984-1985 by multiple and repeated field surveys to determine the distribution pattern of soybean aphid and its causes. The corresponding sequential sampling and comparison table.