| 雨水和土壤含水量对棉铃虫种群抑制作用初探 |
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| 引用本文： | 张建军,杨益众,邵益栋,余月书,任璐,钱坤.雨水和土壤含水量对棉铃虫种群抑制作用初探[J].扬州大学学报(农业与生命科学版),2001,22(4):32-34. |
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| 作者姓名： | 张建军 杨益众 邵益栋 余月书 任璐 钱坤 |
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| 作者单位： | 1. 扬州大学实验农牧场,
2. 扬州大学农学院植物保护系, |
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| 摘 要： | 室内测定与田间试验表明 :雨水和土壤含水量对棉铃虫种群有较大的抑制作用。棉铃虫卵经雨水浸泡 8h,幼虫孵化率明显下降 ;中等雨水对棉铃虫卵有较大的冲刷作用 ,雨量越大 ,卵被冲刷的数量越多 ;初孵幼虫经雨水浸泡 1 h,其存活率明显低于对照 ;土壤湿度对棉铃虫蛹的影响主要表现在化蛹初期与羽化前 ,2 5 %的含水量对虫蛹有致死作用
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| 关 键 词： | 棉铃虫 雨水 土壤含水量 种群 |
| 文章编号： | 1000-2049(2001)-04-0032-03 |
| 修稿时间： | 2001年7月24日 |
PRELIMINARY STUDY ABOUT FEECT OF RAINWATER AND SOIL MOISTURE ON COTTON BOLLWORM |
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| ZHANG Jian jun ,YANG Yi zhong ,SHAO Yi dong ,YU Yue shu ,REN Lu ,QIAN Kun.PRELIMINARY STUDY ABOUT FEECT OF RAINWATER AND SOIL MOISTURE ON COTTON BOLLWORM[J].Journal of Yangzhou University:Agricultural and Life Science Edition,2001,22(4):32-34. |
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| Authors: | ZHANG Jian jun YANG Yi zhong SHAO Yi dong YU Yue shu REN Lu QIAN Kun |
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| Institution: | ZHANG Jian jun 1,YANG Yi zhong 2,SHAO Yi dong 2,YU Yue shu 2,REN Lu 2,QIAN Kun 2 |
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| Abstract: | The field investigation and laboratory test showed that rainwater and soil moisture played an important role in population control of cotton bollworm (Helicoverpa armigera ). After the eggs of cotton bollworm were soaked in rainwater for 8 hours, the hatching rate of larvae would decline apparently. Medium amount of rainfall scoured the eggs of cotton bollworm. The more rainfall, the more eggs were scoured. When the incubated larvae were soaked in rainwater only for 1 hour, the survival rate was lower than the normal condition. The influence of soil moisture on the pupae of cotton bollworm was mainly manifested in two periods. One was the initial stage of pupation,the other was the time before eclosion. During the two periods, 25% soil moisture was fatal to the pupae. |
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| Keywords: | Helicoverpa armigera rainwater moisture population |
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