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1 September 2009 Plant Growth and Soybean Cyst Nematode Response to Purple Deadnettle (Lamium purpureum), Annual Ryegrass, and Soybean Combinations
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Abstract

A greenhouse study was conducted to determine the influence of soybean cyst nematode (SCN) –susceptible and –resistant plant combinations on SCN population densities and plant growth. Purple deadnettle, annual ryegrass, SCN-resistant and -susceptible soybean were planted in pots alone or in combination at one plant pot−1. Annual ryegrass and purple deadnettle reduced soybean growth. Pots with SCN-resistant plants had lower numbers of SCN cysts and eggs than pots with SCN-susceptible plants. However, an SCN-susceptible species grown with any of the SCN-resistant plants resulted in higher cyst counts than pots with only SCN-resistant plants. From an SCN management standpoint, this research suggests that there may be no incentive to using annual ryegrass as a cover crop over planting other SCN-resistant crops to reduce SCN population density.

Nomenclature: Purple deadnettle, Lamium purpureum L. LAMPU; annual ryegrass, Lolium multiflorum Lam.; soybean, Glycine max (L.) Merr.; soybean cyst nematode, Heterodera glycines Ichinohe.

Valerie A. Mock, J. Earl Creech, Vince M. Davis, and William G. Johnson "Plant Growth and Soybean Cyst Nematode Response to Purple Deadnettle (Lamium purpureum), Annual Ryegrass, and Soybean Combinations," Weed Science 57(5), 489-493, (1 September 2009). https://doi.org/10.1614/WS-09-005.1
Received: 10 January 2009; Accepted: 1 April 2009; Published: 1 September 2009
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