| 北京地区中华草蛉发生消长及其原因的探讨 |
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| 引用本文： | 王韧,周伟儒,陈红印,邱式邦.北京地区中华草蛉发生消长及其原因的探讨[J].中国生物防治,1986(3). |
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| 作者姓名： | 王韧 周伟儒 陈红印 邱式邦 |
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| 作者单位： | 中国农科院生防室
(王韧，周伟儒，陈红印)，中国农科院生防室(邱式邦) |
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| 摘 要： | 1980—1983年在北京郊区观察,中华草蛉在自然温度下,一年可繁殖6代,以成虫在9月下旬进入越冬,来年8月中旬开始活动。平川农区6月中旬以前发生数量稀少,至7、8月间,出现两次成虫高峰。9月以后,田间取食及栖息条件急剧恶化,迫使成虫不断转移,数量骤减。当晚秋和早春平川草蛉数量低时,山区却在9—10月及来年3—4月出现两次显著高峰,说明山区是中华草蛉的主要越冬场所和平川地区来春虫口的重要来源,山区的栖息和取食条件较平川优越。有利于草蛉的越冬。春季平川地区草蛉数量很低,主要是由于越冬期间成虫大量死亡。因此,调整农区和山区植物相,提供更多的密源、花源植物,以减少越冬死亡率;并在春季作物上接种释放草蛉,扩大种群基数,是一条值得探索的草蛉利用途径。
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| 关 键 词： | 中华草蛉 天敌保护助增 |
POPULATION FLUCTUATIONS OF Chrysoperls (Chrysops) sinics (TJEDER) AND ITS ATTRIBUTING FACTORS IN BEIJING AREA |
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| WANG Ran ZHOU Weiru CHEN Hongyin QIU Shibang.POPULATION FLUCTUATIONS OF Chrysoperls (Chrysops) sinics (TJEDER) AND ITS ATTRIBUTING FACTORS IN BEIJING AREA[J].Chinese Journal of Biological Control,1986(3). |
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| Authors: | WANG Ran ZHOU Weiru CHEN Hongyin QIU Shibang |
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| Abstract: | Six generations of C._ sinica could be reared outdoors in a year in the BeiJing auburba. Observations made during 1980 to 1983 showed that C, sinica overwinters aa adult from late September to mid March mainly in rock crevices and debria in the mountainous region. In spring, the population remained low in the plain agricultural area until July and August, when two adult peaks occurred respectively. Adult population declined drsmaticly after September, resulting from harvesting of field crops. Conseqently, the adults dispersed to and formed a distinctive peak in the mountainous region, where food source and shelters of C. ainica are more adequate than that In the plain. Another adult peak in the area was observed in late spring. It is hence believed that the mountainous region serves aa a reservoir of C. ainica during winter and the source of the initiating population in the plain for the following year. High adult mortality during the overwintering period appeared to be mainly responsible for the low spring population level in the plain area. Manipulation of cropping systems and inoculative releases of C, ainica ara recommended to enhance the predator's population in the early aeason. |
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| Keywords: | Chrysoperla (Chryeopa) sinica conservation and augmentation |
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