利用泽兰实蝇控制紫茎泽兰的生防策略研究

应用生态学报 ›› 1990, Vol. 1 ›› Issue (4): 315-321.

利用泽兰实蝇控制紫茎泽兰的生防策略研究

陈旭东, 何大愚

中国科学院昆明生态研究所, 昆明 650223

收稿日期:1990-03-17 出版日期:1990-10-25 发布日期:1990-10-25

Study on the strategy of biological control of Eupatorium adenophorum by using Procecidochares utilis

Chen Xudong, He Dayu

Kunming Institute of Ecology, Academia Sinica, Kuriming 650223

Received:1990-03-17 Online:1990-10-25 Published:1990-10-25

摘要/Abstract

摘要： 本文根据野外泽兰实蝇种群15个世代的调查资料,利用契贝谢夫正交多项式拟合了泽兰实蝇、紫茎泽兰的空间格局。阐明了泽兰实蝇空间格局的序列变化及紫茎泽兰空间格局的特点;揭示了泽兰实蝇空间格局的特点受当地主风及寄主紫茎泽兰空间格局特点的影响;并从最优控制系统的角度对泽兰实蝇-紫茎泽兰系统作了初步探讨。首次提出了最佳释放虫量指标为每条虫占有10条枝条。这些结果为多点释放及定点多次释放泽兰实蝇防治紫茎泽兰这一生防策略提供了理论基础。

关键词: 最优控卷, 生防策略

Abstract: Crefton weed (Eupatorium adenophorum) has a great influence to the development of agriculture,forestry,livestock husbandry and sideline in Yunnan province and even in southwest China. To control it effectively,a biological control strategy is put forward. In view of optimal control,the authois made a primaiy study on P. utilis-E. adenophorum system. The status equation of optimal control system can be summarized as: Y=2.140282Y-0.029968U the optimal control trail: U^*(t)=14285.7715 exp(-2.140878t) the optimal status trail:Y^*(t)=100 exp(-2.140878t) here Yis the percentage of unparasitized shoot,Uis the number of P. utilis. It is optimal that one P. utilis holds ten shoots of E. adenophorum for its releasing on field. On basis of these results,the strategy of releasing P.utilis in poly-sites and one site at several times was advanced firstly.

Key words: Optimal control, Bio-control strategy

陈旭东, 何大愚. 利用泽兰实蝇控制紫茎泽兰的生防策略研究[J]. 应用生态学报, 1990, 1(4): 315-321.

Chen Xudong, He Dayu . Study on the strategy of biological control of Eupatorium adenophorum by using Procecidochares utilis[J]. Chinese Journal of Applied Ecology, 1990, 1(4): 315-321.