ISHS Acta Horticulturae 424: II International Rose Symposium
HOST SUITABILITY OF ROSE ROOTSTOCKS TO THE ROOT-KNOT NEMATODE MELOIDOGYNE HAPLA USING A HIGH-INOCULUM-PRESSURE TEST |
| Authors: | R. Voisin, J.C. Minot, D. Esmenjaud, Y. Jacob, G. Pelloli, S. Aloisi |
| Abstract:
Host suitability of 32 rose rootstocks from the INRA collection in Fréjus (France) ranging into 14 R. indica, 7 R. multiflora, 2 R. canina, 2 R. manetti and 7 other rootstocks was evaluated under greenhouse using one population of M. hapla. Cuttings were infested by transfering into each container the root system and soil of one galled tomato, previously inoculated under controlled conditions, and co-growing both plants for 2 months before the removal of top part of tomato. The whole rose rootstocks were harvested 3 months after infestation for a gall index rating and root nematodes extraction was performed in 10 of them. Rosa manetti resulted free of galls and harboured incipient nematode numbers whereas R. canina had a very light galling and nematode numbers intermediate between R. manetti and R. multiflora. Rosa multiflora ranged from lightly (resistant rootstocks K1, K2 and Floradale) to moderately galled. The whole R. indica genotypes ranged from moderately to heavily galled except one that showed lighter symptoms. Nematode numbers confirmed previous results. | |
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