. Research for tomorrow's forests : 1983 research accomplishments. --. Forests and forestry Research United States. New and Cheaper Ways To Control Walnut Root Rots Root rot boosts the cost of producing walnut seedlings by more than $4 per thousand, or 17 percent of total produc- tion costs. For States that grow large numbers of walnut seedlings, these additional costs are significant. Cooperating researchers at the North Central Forest Experiment Station, Purdue University, and Virginia Poly- technic Institute and State University have found that five different fungi are responsible for walnu
. Research for tomorrow's forests : 1983 research accomplishments. --. Forests and forestry Research United States. New and Cheaper Ways To Control Walnut Root Rots Root rot boosts the cost of producing walnut seedlings by more than $4 per thousand, or 17 percent of total produc- tion costs. For States that grow large numbers of walnut seedlings, these additional costs are significant. Cooperating researchers at the North Central Forest Experiment Station, Purdue University, and Virginia Poly- technic Institute and State University have found that five different fungi are responsible for walnut seedling root rots. Scientists at these institutions have developed a guide for nursery managers that describes walnut root rot symptoms and shows managers how to identify the fungi that cause the diseases. The guide also recommends cultural, biological, and integrated controls that could be less expensive than chemical controls. One example is the use of raised seedling beds. These promote good drainage after irrigation and avoid conditions that favor root rots. This and other recommendations in the guide are already being used by nursery man- agers in the Midwest to increase walnut production and reduce Preventing root rot in the nursery bed can mean substantial savings for States that grow many black walnut seedlings. 21. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Forest Service. [Washington, D. C. ?] : USDA, Forest Service
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