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经过 3年的研究 ,根据虫口密度 ,叶片被害率与枣树产量以及被害枣树的经济损失的关系 ,确定枣大球蚧 Eulecanium gigantea(Shinji)的防治指标为 1 0头 / 1 0 cm2 叶片 ,实践证明该指标切实可行。
After 3 years of research, the control index of Eulecanium gigantea (Shinji) was 10 leaves / 10 cm2 leaves according to the relationship between insect population density, leaf damage rate, jujube yield and the economic loss of jujube. Practice has proved that the indicator is feasible.