| 摘要: |
| 通过对草履蚧（Drosicha corpulenta (Kuwana)）预测预报和防治指标的研究，总结出发生期预测法、危害程度预测法和天敌控制能力预测法等测报技术。得出了平均虫口密度（x)与平均萌芽率（y1)间的关系模型y1=95.36-39.18x、平均虫口密度（x)与平均枝枯率（y2)间的关系模型y2=0.08 21.71x、树干表面平均虫口密度（x)和材积损失率（y3)间的关系模型y3=0.737+25.46x。确定了草履蚧的防治指标为树干表面有虫0.16头/cm2，制定了草履蚧危害程度分级标准和综合防治策略。 |
| 关键词: 草履蚧 预测预报 防治指标 |
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| 基金项目:西安市林业科学技术计划项目(9701) |
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| Study on forecasting and control threshold of Drosicha corpulenta (Kuwana) |
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| Abstract: |
| This paper deals with forecasting techniques and control threshold of Drosicha corpulenta (Kuwana),and studies the applications of distance-period forecast,damage-grade forecast and enemy control-capability forecast in the scale.The results show that the regression model of average scale density (x) and average budding rate (y1) is y1=95.36-39.18x;the model of average scale density (x) and average rate (y2) is y2=0.08+21.71x;the model of average scale density(x) and timber loss rate (y3) is y3=0.737+25.46x.At last,we determine 0.16 scale cm-2 of the control threshold,and put up the grading standard IPM techniques of the scale. |
| Key words: Drosicha corpulenta (Kuwana) forecasting control threshold |
