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| 苹果黄蚜危害苹果经济损失和经济阈值的研究 | |
| 引用本文： | 牟少敏,刘忠德,孔繁华,高兴文,时爱菊,邱玉芹.苹果黄蚜危害苹果经济损失和经济阈值的研究[J].山东农业大学学报(自然科学版),2002,33(1):87-88,100. |
| 作者姓名： | 牟少敏 刘忠德 孔繁华 高兴文 时爱菊 邱玉芹 |
| 作者单位： | 1. 山东农业大学理学院,泰安271018 2. 泰安市农科所,泰安,271000 3. 泰安市植保站,泰安,271000 4. 泰安市农校,泰安,271000 5. 烟台市植保站,烟台,264001 |
| 摘 要： | 研究了苹果黄蚜危害苹果树新梢第二、四叶的百叶蚜量（x）与苹果产量损失率（y）的相关式为y=-16.009975 0.03707x(r=0.9473），分析提出了其经济阈值为250叶（第二、四叶）蚜量1250头。为了节省调节工时，根据第二、四叶卷叶率（y）蚜量（x）的相关式y=-0.06801 0.007069x(r=0.9945)，求得卷叶率，即其经济阈值也可为第二、四叶卷叶率10％。 |
| 关 键 词： | 苹果 苹果黄蚜 卷叶率 经济阈值 经济损失 |
| 文章编号： | 1000-2324(2002)01-0087-02 |
STUDIES ON APPLE YIELDLOSS RATE AND ECONOMIC THRESHOLD CAUSED BY APHIS CITRICALA |
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| MU Shao-min ,LIU Zhong-de ,KONG Fan-hua ,GAO Xing-wen ,SHI Ai-ju ,QIU Yu-qin.STUDIES ON APPLE YIELDLOSS RATE AND ECONOMIC THRESHOLD CAUSED BY APHIS CITRICALA[J].Journal of Shandong Agricultural University,2002,33(1):87-88,100. | |
| Authors: | MU Shao-min LIU Zhong-de KONG Fan-hua GAO Xing-wen SHI Ai-ju QIU Yu-qin |
| Institution: | MU Shao-min 1,LIU Zhong-de 2,KONG Fan-hua 3,GAO Xing-wen 3,SHI Ai-ju 4,QIU Yu-qin 5 |
| Abstract: | The relationship between the amount of Aphis citricala on one hundred leaves (first leaf and fourth leaf)(x)and the yield loss rate of apple(y)was studied,their relative formura:y=-16.009975+0.03707x(r=0.9473).Through analysis,its economic threshold:1250 aphids on first leaf and fourth leaf of 250 leaves.In order to save man-power and time of survey,we used the relative formula of aphid amount(x)and the rate of roll leaf(y):y=-0.06801+0.007069x(r=0.9945)to find y,i.e.the economic threshold might be 10% of rate roll leaf rate also. |
| Keywords: | apple Aphis citricala the rate of roll leaf economic threshold |
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