ISHS Acta Horticulturae 592: V International Peach Symposium
RESPONSE OF PRUNUS ROOTSTOCKS TO ROOT-KNOT (MELOIDOGYNE SPP.) AND ROOT-LESION (PRATYLENCHUS VULNUS) NEMATODES |
| Authors: | M. Di Vito, A. Battistini, L. Catalano |
| Keywords: | Nematodes, Meloidogyne spp., Pratylenchus vulnus, Prunus spp., resistance |
| Abstract:
The reaction of Prunus spp. rootstocks to Italian populations of Meloidogyne incognita, M. javanica, M. arenaria and M. hapla, a Spanish population of M. hispanica, and Pratylenchus vulnus was assessed in pots. Single one-year-old seedlings were transplanted in clay pots containing 3 litre of sterilized sandy soil. Simultaneously, two leaf stage tomato seedlings grown in 150-ml plastic containers were inoculated with 5,000 eggs and juveniles of one of the root-knot nematode populations per plant. After two months tomato roots were removed and placed in one hole into each pot of Prunus. In another lot of pots 5,000 juveniles and adults of P. vulnus were directly inoculated in each pot. All pots were arranged on benches in a screenhouse maintained at 26 ± 4°C. Nematode attacks were evaluated five months after inoculation by assessing the root gall index, according to a 0-5 scale, for root-knot nematodes and counting number of specimens extracted from the roots for P. vulnus. Four rootstocks were resistant to all species of root-knot nematodes tested. One clone was resistant to M. incognita, M. javanica, M. arenaria and M. hapla, and one clone was resistant to M. incognita, M. javanica, M. hispanica and M. hapla. All Prunus rootstocks were susceptible to the root-lesion nematode P. vulnus. | |
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