THE PARASITISM OF RED PINE AND OTHER FOREST NURSERY CROPS BY TYLENCHORHYNCHUS CLAYTONI STEINER 1) BY JACK R. SUTHERLAND AND R. E. ADAMS Department of Plant Pathology, Bacteriology, and Entomology, West Virginia University, Morgantown, U.S.A. The tobacco stunt nematode, Tylenchorhynchus claytoni, was parasitic on but not pathogenic to, red pine seedlings (Pinus resinosa Ait.). Twelve other species of forest nursery seedlings were also found to be hosts for this nematode. No feeding or reproduction was found on red pine callus in vitro but the nematode fed and reproduced on red pine roots in agar culture. Little or no visible damage to roots was caused by nematode attack. However, the organization of root-cap cells was disrupted by the feeding activity of the nematode. A large segment of the economy of West Virginia is based on forestry and its products. Because this resource has been unwisely exploited, there is much land that should have been replanted to desirable trees. At the present time, this is accomplished most easily by planting nursery-grown seedlings. The repeated pro- duction of seedlings in the same nursery has led to problems in production which are alleviated when the soil is fumigated prior to planting. These
Nematologica – Brill
Published: Jan 1, 1964
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