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Of eight soybean cultivars tested Pickett and Dyer, were found to be resistant to the reinform nematode, Rotylenchulus reniformis. In the presence of Pickett and Dyer, the soil counts of renifonni nematodes were significantly reduced from an initial 10,000 larvae to less than 500 per pot over a 2.5-month period. Cultivars resistant to the root knot, Meloidogyne spp., did not possess resistance to the reniform nematode but those resistant to the soybean cyst nematodes, Heterodera glycines, did. Under the conditions of the test, the seed yields of Pickett increased while those of Hood decreased when inoculated with reniform nematodes.
Key Words: nematode resistance yields
2 Nematologist, Crops Research Division., Agricultural Research Service, U.S. Department of Agriculture; Associate Professor, Department of Agronomy and Soils; and Nematologist, Department of Botany and Plant Pathology, Auburn University, Agricultural Experiment Station, Auburn, Ala. 36830, respectively.
Received for publication October 20, 1967.
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