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Selected Works

2001

Articles 1 - 2 of 2

Full-Text Articles in Agriculture

Variation Among Isolates Of Fusarium Graminearum Associated With Fusarium Head Blight In North Carolina, Scott L. Walker, Steven Leath, Winston M. Hagler Jr., J. Paul Murphy Mar 2001

Variation Among Isolates Of Fusarium Graminearum Associated With Fusarium Head Blight In North Carolina, Scott L. Walker, Steven Leath, Winston M. Hagler Jr., J. Paul Murphy

Steven Leath

Fusarium head blight (FHB) can reduce yield of wheat and decrease the value of harvested grain by accumulation of detrimental toxins. Understanding the variability of the fungal population associated with infection could improve disease control strategies. Sixty-six isolates of Fusarium graminearum associated with FHB were collected in North Carolina and tested for in vitro growth rate, in vitro production of deoxynivalenol (DON) and zearalenone, and pathogenicity on three cultivars of soft red winter wheat. Significant differences among isolates were found for all three traits. Randomly Amplified Polymorphic DNA (RAPD) analysis revealed high levels of genotypic diversity among isolates. Isolates of …

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Soybean As A Receiver Crop For Nitrogen In Swine Lagood Effluent, Daniel W. Israel, Robert Mikkelsen Dec 2000

Soybean As A Receiver Crop For Nitrogen In Swine Lagood Effluent, Daniel W. Israel, Robert Mikkelsen

Robert Mikkelsen

Soybean (Glycine max L. Merr.) has been approved by the Natural Resource Conservation Service as a receiver crop for N in swine lagoon effluent applied to spray fields. However, its efficacy as a N receiver crop depends on the sensitivity of symbiotic N2 fixation to inhibition by N in the applied effluent. The objectives of this study were to use a 15N natural abundance method to (i) assess the degree of inhibition of symbiotic N2 fixation in soybean by applied effluent N and (ii) determine the quantity of effluent N removed from the soil in harvested seed of nodulating soybean. …

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