Striga gesnerioides and its host - The cowpea: Interaction and control methods

被引：15

作者：

Dubé, M.-P. ^{[1
]}

Olivier, A. ^{[1
]}

机构：

[1] Département de Phytologie, Faculte Sci. l'Agric. de l'Aliment., Université Laval, Sainte-Foy, Que. G1K 7P4, Canada

来源：

| 2001年 / National Research Council of Canada卷 / 79期

关键词：

Cultivation; -; Photosynthesis; Seed; Soils; Water;

D O I：

10.1139/cjb-79-10-1225

中图分类号：

学科分类号：

摘要：

Cowpea (Vigna unguiculata (L.) Walp.) is an important legume crop in subsaharian Africa. However, its cultivation is threatened by the parasitic weed Striga gesnerioides (Willd.) Vatke, which causes considerable yield losses. Striga gesnerioides is an obligate parasite with low photosynthetic activity. Its seeds germinate in response to specific germination stimulants exuded by host roots. After germination, an haustorium is formed through differentiation of the radicular apex. A vascular connection is subsequently established, allowing the parasitic weed to absorb water and nutrients that are essential for its development. Control of S. gesnerioides is difficult to achieve because of the intimate association between the parasitic weed and its host. The use of resistant cowpea cultivars, in combination with appropriate cultural practices, is probably the easiest and most effective method to control S. gesnerioides and achieve long term reduction of its seed bank in the soil.

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