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Bruce Ackley Thesis.pdf (1.34 MB)

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Interactions of Purple Deadnettle, Lamium purpureum, Soybean Cyst Nematode, Heterodera glycines and Italian Ryegrass, Lolium multIflorum

Ackley, Bruce A
http://rave.ohiolink.edu/etdc/view?acc_num=osu1376911405

Abstract Details

2013, Master of Science, Ohio State University, Horticulture and Crop Science.
Soybean cyst nematode (SCN; Heterodera glycines) causes more economic damage to U.S. soybean producers than any other soybean pathogen. Greenhouse and field studies have shown that the winter annual weed purple deadnettle (PDN) is an alternate host of SCN. Previous work has shown that Italian ryegrass significantly reduced SCN populations in soil under greenhouse and field conditions, but the nature and extent of this suppressive effect on SCN is not well understood. My research focused on investigating the nature of the Italian ryegrass x SCN interaction and the effectiveness of Italian ryegrass as a winter cover crop to suppress SCN and PDN. The first study was conducted in the greenhouse and consisted of a replacement pot experiment in which plant biomass and SCN reproduction was measured from pots containing various ratios of Italian ryegrass (IR) and PDN, +SCN. The second study was conducted at Waterman Agricultural and Natural Resource Laboratory of The Ohio State University, Columbus, OH in SCN infested field microplots and was designed to duplicate treatments investigated in the greenhouse with the addition of other forage species. The studies focused on the dual ability of Italian ryegrass to provide suppression of PDN and reduce SCN populations. A primary objective of the research was to quantify the pest suppressive effects of Italian ryegrass and propose methods by which to integrate it into a typical Ohio crop rotation. Dry shoot biomass of IR or PDN did not differ between SCN-inoculated and non-inoculated treatments. PDN had the competitive advantage over IR under greenhouse conditions. SCN reproduction generally occurred to a similar extent regardless of the PDN:IR ratio. Overall results of the field study showed that after two years of growing susceptible soybean in heavily SCN-infested plots, all winter annual cover crops tested were generally effective in preventing an increase in SCN population growth. Furthermore, my research indicated that an IR cover crop planted in early autumn after soybean significantly reduced SCN population density in soil and was significantly more effective in reducing SCN egg population densities than oat or rye cover crops. Thus incorporation of IR into soybean cropping systems as a winter annual cover crop has the potential to be a useful SCN management tactic for producers.
Kent Harrison, Dr. (Advisor)
Mark Sulc, Dr. (Advisor)
Emilie Regnier, Dr. (Committee Member)
56 p.
Agriculture; Agronomy
Purple Deadnettle; Lamium purpureum; Soybean Cyst Nematode; Heterodera glycines; Italian Ryegrass; Lolium multIflorum

Recommended Citations

Citations

  • Ackley, B. A. (2013). Interactions of Purple Deadnettle, Lamium purpureum, Soybean Cyst Nematode, Heterodera glycines and Italian Ryegrass, Lolium multIflorum [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376911405

    APA Style (7th edition)

  • Ackley, Bruce. Interactions of Purple Deadnettle, Lamium purpureum, Soybean Cyst Nematode, Heterodera glycines and Italian Ryegrass, Lolium multIflorum. 2013. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1376911405.

    MLA Style (8th edition)

  • Ackley, Bruce. "Interactions of Purple Deadnettle, Lamium purpureum, Soybean Cyst Nematode, Heterodera glycines and Italian Ryegrass, Lolium multIflorum." Master's thesis, Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376911405

    Chicago Manual of Style (17th edition)

osu1376911405
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This open access ETD is published by The Ohio State University and OhioLINK.