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INVESTIGATIONS ON THE RESISTANCE OF ROSE ROOT-STOCKS TO MELOIDOGYNE HAPLA AND PRATYLENCHUS PENETRANS BY W. A. COOLEN and G. J. HENDRICKX State Nematology and Entomology Research Station, Wetteren, Belgium In field experiments 13 rose root-stocks were tested for their host reaction to M, hapla and P. penetrans. All root-stocks should be considered as host plants for both species. Nevertheless, great differences in host efficiency occurred, especially with M. hapla where two root-stocks proved to be poor hosts. Preliminary investigations indicated differences in reaction to Meloido$yne hapla between species and cultivars of rose stocks. The availability of resistant plant material is of great importance to growers in reducing the nematode popu- lation in the soil and, moreover, in avoiding possible export difficulties. There- fore, rose root-stocks commonly used in Belgium were systematically tested for susceptibility to Meloidogyne hapla and Pratylenchus penetrans. Materials and methods The range of rose root-stocks tested are listed in Table II. In the test with M. hapla, Rosa chinensis 'Manettii' and R. chinensis 'Major' failed to produce roots and are, therefore, omitted in Table I. All test plants were free from Meloidogyne spp. and P. penetrans. Both field experiments were executed on a sandy soil.
Nematologica – Brill
Published: Jan 1, 1972
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