ARS | Publication request: REPRODUCTION OF PARATRICHODORUS MINOR ON CORN HYBRIDS AND INBREDS

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: July 19, 2006
Publication Date: August 14, 2006
Citation: Timper, P., Krakowsky, M.D. 2006. Reproduction of Paratrichodorus minor on corn hybrids and inbreds [abstract]. Journal of Nematology. 38:299.

Technical Abstract: In the southeastern United States, stubby-root nematode (Paratrichodorus minor) causes more damage to corn (Zea mays) than any other plant-parasitic nematode. Currently, there is no known source of resistance in corn to this nematode. Our objective was to evaluate corn hybrids and inbreds for resistance to P. minor. In all experiments, Pioneer 3223 served as a susceptible control. Corn seed was planted in sterilized soil (five replicate pots per hybrid or inbred) and inoculated with 500 P. minor 2 weeks after planting. Nematodes were extracted from soil 50 days after inoculation. Of the 33 commercial corn hybrids tested, three supported less reproduction of P. minor than Pioneer 3223; reproduction on these three hybrids was 18% to 42% that of the susceptible control. None of the 10 public inbreds tested supported less reproduction than Pioneer 3223. In conclusion, moderate resistance to P. minor can be found within commercial corn hybrids.