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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Issue 7 (1951) → Ethylene Dibromide Controls a Root Rot at the W. W. Ashe Nursery

Ethylene Dibromide Controls a Root Rot at the W. W. Ashe Nursery

A little-known root disease has taken a persistent though variable toll of seedlings at the W. W. Ashe Nursery near Brooklyn, Mississippi, since the nursery was established in 1936. All pine species produced there (Pinus palustris, P. caribaea, P. taeda, and P. echinata) are susceptible. _ The above ground symptoms vary with the species involved and the intensity of the disease. Loblolly and shortleaf may suffer wholesale mortality in the seedling beds. during the summer months. They die in an upright position much as if the root had been cut by grubs. Such mortality has seldom occurred with longleaf and never with slash. However, "all species may suffer severe root damage without noticeable top symptoms. Therefore, the most reliable symptoms are those present on the roots when 1-0 stock is lifted. These may range from small, reddish, rough areas on the tap and larger lateral roots, to a blackening and roughening of the entire surface of the tap root with few laterals and these often stubby, and to a rotting away of the lower tap root, often with a profuse development of laterals near the soil surface.


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Author(s): Berch W. Henry

Publication: Tree Planters' Notes - Issue 7 (1951)