| 菜青虫危害春甘蓝的产量损失及防治指标研究 |
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| 引用本文： | 张丽莉,马骁勇,万开军.菜青虫危害春甘蓝的产量损失及防治指标研究[J].河南农业科学,1995(9). |
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| 作者姓名： | 张丽莉 马骁勇 万开军 |
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| 作者单位： | 信阳农业高等专科学校，信阳农业高等专科学校，信阳农业高等专科学校 信阳 464000，信阳 464000，信阳 464000 |
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| 摘 要： | 采用人工接虫法,探讨了不同密度菜青虫对春甘蓝产量的影响。结果表明,菜青虫百株虫量(x)与甘蓝产量(y)呈显著负相关,相关式为y=165.8904—0.0385x(r=-0.9902)。通过五种曲线模拟及回归分析,得出了虫口密度与甘蓝产量损失率()之间的关系为幂函数,即=0.0208x~(1.0057)(r=0.9961)。提出了豫南地区甘蓝菜青虫防治指标为百株虫量55头。
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| 关 键 词： | 菜青虫 甘蓝 产量损失 防治指标 |
The Study on the Spring Cabbage Loss Caused by Imported CobbagewOrm (Pieris rapae L. )and the Index for Control |
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| Zhang Lili Ma Xiaoyong Wan Kaijun.The Study on the Spring Cabbage Loss Caused by Imported CobbagewOrm (Pieris rapae L. )and the Index for Control[J].Journal of Henan Agricultural Sciences,1995(9). |
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| Authors: | Zhang Lili Ma Xiaoyong Wan Kaijun |
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| Abstract: | the effect of different population of imported cabbageworm on spring cab-bage yield was studied in 1992. The results show that the relationship between the amount of imported cabbagewoorm on 1 0 0 - plant cabbages and the rate of yield loss is significantly negative correlation. The regression formula is y = 0. 0208?.0057( r = 0. 9961 ** ). It is suggested that the preventive index is 55 imported cabbageworms on one hundred cabbages. |
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| Keywords: | Imported cabbageworm Spring cabbage Yield loss control index |
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