干旱区生态环境知识资源中心(Arid): 甘肃向日葵害虫与天敌的种群动态及时间生态位

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	甘肃向日葵害虫与天敌的种群动态及时间生态位
其他题名	Adult population dynamics and temporal niche of insects and natural enemies on sunflower in Gansu Province
	葛玉彬 1; 卯旭辉 2; 党占海 2
来源期刊	中国油料作物学报
ISSN	1007-9084
出版年	2015
卷号	37 期号:6 页码:868-875
中文摘要	为揭示甘肃省向日葵害虫及其优势天敌的发生规律,为害虫防控提供依据。2010-2013年,在中部典型干旱区向日葵田采用扫网法顺序抽样,研究害虫及其天敌种群动态,估算时间生态位指数。结果表明,向日葵螟(Homoeosoma nebulellum)和草地螟(Loxostege sticticalis)在甘肃地区年发生2代,6~7月是越冬代成虫高发期,第1代幼虫严重危害;小地老虎(Agrotis ypsilon)年发生3代,黄地老虎(Agrotis segetum)年发生3~4代,发蛾高峰期分别在4月下旬和7月中旬。上述各虫种群均有世代重叠现象。年际间时间生态位宽度差异大,向日葵螟2011年最大(0.539 7)、2012年与2013年较小(为0.109 2和0.201 1),与天敌螟黄赤眼蜂(Trichogramma chilonis)的时间生态位重叠高于其它天敌,跟随效应显著。小地老虎与天敌中华虎甲(Cicindela chinensis)、伏虎茧蜂(Meteorus rubens)的重叠均较大,2种优势天敌发育时段基本一致,种间竞争效应显著。草地螟与天敌伞裙追寄蝇(Exorista civilis)和双斑截尾寄蝇(Nemorilla maculosa)的时间生态位分离,季节活动性有一定差异。各年时间生态位重叠值表现出时序上的同步性和跟随性,说明向日葵田昆虫种间竞争激烈,属不稳定的生物群落。
英文摘要	For effective pest control on sunflower in Gansu Province, northwest of China, behaviors of insects and natural enemies were investigated in sunflower fields. Based on data from daily sweep net catches of insects in the middle arid region of Gansu from 2010 to 2013, population dynamics and temporal niche of insects and their natural enemies were analyzed. Results showed that Homoeosoma nebulellum and Loxostege sticticalis had 2 generations each year, with a peak season of winter generation from June to July, and the first was the major pestilent generation. Agrotis ypsilon had 3 generations each year, with a peak in late April, and Agrotis segetum had 3-4 generations each year, with the peak in mid-July. Overlap phenomenon of the pests was distinct. Differences of niche breadths were obvious during the 4 years, as shown by H.nebulellum, with the maximum value of 0.539 7 (in 2011) and the minimum of 0.109 2 (in 2012) and 0.201 1 (in 2013) respectively. Temporal niche overlap of H.nebulellum and Trichogramma chilonis were larger than that of other species, showing obvious synchronization features. Cicindela chinensis and Meteorus rubens shared the largest time niche overlap, and controlling Agrotis ypsilon at the same time, while Loxostege sticticalis, Exorista civilis and Nemorilla maculosa revealed niche separations.
中文关键词	向日葵 ; 昆虫 ; 天敌 ; 种群动态 ; 生态位宽度 ; 生态位重叠
英文关键词	Sunflower Insect Natural enemy Population dynamics Niche breadth Niche overlap
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5608349
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233833
作者单位	1.甘肃农业大学, 兰州, 甘肃 730070, 中国; 2.甘肃省农业科学院作物研究所, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	葛玉彬,卯旭辉,党占海. 甘肃向日葵害虫与天敌的种群动态及时间生态位[J]. 甘肃农业大学,2015,37(6):868-875.
APA	葛玉彬,卯旭辉,&党占海.(2015).甘肃向日葵害虫与天敌的种群动态及时间生态位.中国油料作物学报,37(6),868-875.
MLA	葛玉彬,et al."甘肃向日葵害虫与天敌的种群动态及时间生态位".中国油料作物学报 37.6(2015):868-875.