小菜蛾卵寄生蜂在生态恢复条件下的自然增长

摘要/Abstract

摘要： 在生态恢复的深圳龙岗生态示范农场,自然寄生于小菜蛾卵的寄生蜂种类逐年增多.1999年9月,首次发现卷蛾分索赤眼蜂(Trichogrammatoidea bactrae)和玉米螟赤眼蜂(Trichogramma ostrinae)自然寄生于田间小菜蛾卵;同时,拟澳洲赤眼蜂(Trichogramma confusum)和碧岭赤眼蜂(Trichogramma bilingensis)在田间也有一定的自然寄生比率.目前,4种赤眼蜂已经在田间自然建立了种群,其中以拟澳洲赤眼蜂数量占优势,对小菜蛾的自然寄生率为15%,最高时可达29%,表明农田生态条件的恢复对小菜蛾卵寄生蜂有较好的增殖和保护作用.最后提出了在该农场利用赤眼蜂自然控制小菜蛾种群的可能性.

关键词: GF-2, 叶面积指数, Sentinel-2, 相对真值, Landsat-8, 空间代表性, 小菜蛾, 卵寄生蜂, 生态恢复

Abstract: The parasitoids of diamondback moth Plutella xylostella was unfolded year after year since a series of ecological measurement was taken in Shenzhen Longgang Demonstrate Ecological Farm. The parasitical eggs of diamondback moth by Trichogrammatoidea bactrae and Trichogramma ostrinae were firstly found in the field in September 1999. Another two parasitoids, Trichogramma confusum and Trichogramma bilingensis also had a certain parasitism in nature. Now, the four Trichogramma species had already established their natural population, and their average parasitism was 15% around the year, and reached 25～30% at the harvesting period in Autumn, among them, Trichogramma confusum was predominant in quantity,which showed that ecological control played an important role in augmenting and protecting the population of Trichogramma in nature.

Key words: GF-2, leaf area index, Sentinel-2, relativity of true values, Landsat-8, spatial representativeness.

中图分类号:

Q968.1

黄寿山, 陈科伟, 沈叔平. 小菜蛾卵寄生蜂在生态恢复条件下的自然增长[J]. 应用生态学报, 2002, (11): 1449-1451.

HUANG Shoushan, CHEN Kewei, SHEN Shuping . [J]. Chinese Journal of Applied Ecology, 2002, (11): 1449-1451.

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