Volatile allelochemicals in the Ageratum conyzoides intercropped citrus orchard and their effects on mites Amblyseius newsami and Panonychus citri

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	Volatile allelochemicals in the Ageratum conyzoides intercropped citrus orchard and their effects on mites Amblyseius newsami and Panonychus citri
	Kong, CH; Hu, F; Xu, XH; Zhang, MX; Liang, WJ; Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	JOURNAL OF CHEMICAL ECOLOGY
	2005
卷号	31 期号:9 页码:2193-2203
关键词	Ageratum Conyzoides L. Volatile Allelochemical Citrus Orchard Intercropping Predatory Mite Amblyseius Newsami Citrus Red Mite Olfactory Response
ISSN号	0098-0331
英文摘要	Ageratum conyzoides L. weed often invades cultivated fields and reduces crop productivity in Southeast Asia and South China. However, intercropping this weed in citrus orchards may increase the population of predatory mite Amblyseius newsami, an effective natural enemy of citrus red mite Panonychus citri, and keep the population of P. citri at low and noninjurious levels. This study showed that A. conyzoides produced and released volatile allelochemicals into the air in the intercropped citrus orchard, and these volatiles influenced the olfactory responses of A. newsami and P. citri. At test temperature (25 degrees C), A. conyzoides fresh leaves, its essential oil, and major constituents, demethoxy-ageratochromene, beta-caryophyllene, alpha-bisabolene, and E-beta-farnesene, attracted A. newsami and slightly repelled P. citri. Field experiments demonstrated that spraying A. conyzoides essential oil emulsion in an A. conyzoides nonintercropped citrus orchard increased the population density of A. newsami from below 0.1 to over 0.3 individuals per leaf, reaching the same level as in an A. conyzoides intercropped citrus orchard. However, this effect could not be maintained beyond 48 hr because of the volatility of the essential oil. In contrast, in the A. conyzoides intercropped citrus orchard, A. conyzoides plants continuously produced and released volatile allelochemicals and maintained the A. newsami population for a long time. The results suggest that intercropping of A. conyzoides not only made the citrus orchard ecosystem more favorable for the predatory mite A. newsami, but also that the volatile allelochemicals released from A. conyzoides regulated the population of A. newsami and P. citri.
学科主题	Biochemistry & Molecular Biology ; Ecology
语种	英语
WOS记录号	WOS:000231471400015
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55073]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Kong, CH,Hu, F,Xu, XH,et al. Volatile allelochemicals in the Ageratum conyzoides intercropped citrus orchard and their effects on mites Amblyseius newsami and Panonychus citri[J]. JOURNAL OF CHEMICAL ECOLOGY,2005,31(9):2193-2203.
APA	Kong, CH,Hu, F,Xu, XH,Zhang, MX,Liang, WJ,&Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2005).Volatile allelochemicals in the Ageratum conyzoides intercropped citrus orchard and their effects on mites Amblyseius newsami and Panonychus citri.JOURNAL OF CHEMICAL ECOLOGY,31(9),2193-2203.
MLA	Kong, CH,et al."Volatile allelochemicals in the Ageratum conyzoides intercropped citrus orchard and their effects on mites Amblyseius newsami and Panonychus citri".JOURNAL OF CHEMICAL ECOLOGY 31.9(2005):2193-2203.