Submitted to: Methyl Bromide Newsletter
Publication Type: Other
Publication Acceptance Date: January 1, 1997
Publication Date: N/A
Interpretive Summary: The USDA-ARS and Clemson University are providing commercial nurseries with seed of Guardian peach rootstock from sibling-seed orchards. One unanswered question about the commercially available Guardian seed is its host suitability toward root-knot nematodes, especially the Southern (M. incognita) and Javanese (M. Javanica) root-knot nematodes. Tests were initiated to determine the susceptibility of Guardian rootstock to these two above mentioned root-knot nematode species. Results indicate that for both root-knot nematodes, reproduction was less on both Guardian sources than on Lovell. Furthermore, galls form on roots of trees from both Guardian seed sources, and in fact, M. incognita produced just as many galls on Guardian as on Lovell. The major benefit from these research results is that root-knot nematodes do not reproduce well on Guardian rootstock even though galls are formed. Additionally, Guardian rootstock developed by USDA-ARS and Clemson University is showing promise as an alternative to preplant fumigation with chemical nematicides (e.g., methyl bromide) for peach orchards.
Technical Abstract: N/A