Abstract
The stunt nematode,
Tylenchorhynchus claytoni, was found to cause a reduction in root volume (cm3) of loblolly pine at population densities equivalent of 125 nematodes/100 cm3 (6 in3) soil and greater. The results of a host range test conducted in containers under controlled conditions determined that buckwheat cultivar (
Fagopryum esculentum 'Mancan'), velvetbean (Mucuna pruriens), Kobe lespedeza (
Lespedeza striata 'Kobe'), bicolor lespedeza (
Lespedeza bicolor), and purple nutsedge (
Cyperus rotundus) are suitable hosts for the stunt nematode. Previous container studies concluded that pearl millet (
Pennisetum glaucum) hybrid 'ET-300' was a nonhost for the stunt nematode. A 2-year field test of sorghum-sudangrass hybrid 'Sugar Graze,' pearl millet hybrid 'Tifleaf 3,' and fallow found that the use of pearl millet as a cover crop greatly restricts population development of the stunt nematode in infested fields, and its use would be a good alternative to fallow.
Parent Publication
Keywords
nematode,
stunt,
stubby-root,
Tylenchorhynchus claytoni,
Paratrichodorus minor,
Pinus taeda,
pine,
cover crops,
sorghum-sudangrass,
pearl millet,
fallow,
Fagopyrum esculentum,
Mucuna pruriens,
Lespedeza striata,
Lespedeza bicolor,
Cyperus rotundus
Citation
Cram, Michelle M.; Fraedrich, Stephen W. 2009. Stunt nematode (
Tylenchorhynchus claytoni) impact on southern pine seedlings and response to a field test of cover crops. In: Dumroese, R. K.; Riley, L. E., tech. coords. National Proceedings: Forest and Conservation Nursery Associations-2008. Proc. RMRS-P-58. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 95-100