Reaction of strawberry cultivars to root-knot and root-lesion nematodes

Resumo

Considering the economic importance of the strawberry production in Brazil, under soil cultivation the reaction of eight commercial strawberry cultivars (Short Day- Festival, Camino Real, Camarosa, Oso Grande; and Day Neutral- Monterey, San Andreas, Aromas, and Albion) was evaluated for resistance to Meloidogyne and Pratylenchus species. Different strawberry cultivars maintained in individual pots with sterilized soil were inoculated with 5,000 eggs + second stage juveniles of each Meloidogyne species (Meloidogyne arenaria, M. incognita, M. javanica or M. hapla) or 1,000 Pratylenchus specimens of each species (Pratylenchus zea or P. brachyurus)/plant. The experiment was carried out in a completely randomized design with six replications using Tomato 'Rutgers' and sorghum '506' plants as control to root-knot and lesion nematodes, respectively. Ninety days after inoculation, the nematode reproduction factor (RF=final population/initial population) was evaluated to determine the resistance of the strawberry genotypes to each nematode species. All cultivars behaved as resistant (FR<1,00) or immune (FR=,00) to M. javanica, M. incognita, P. zeae and P. brachyurus. The cultivar 'Camarosa' was susceptible (FR>1,00) to M. arenaria and M. hapla and 'Oso Grande' behaved either as a good host to M. hapla; however the other cultivars were resistant to these two Meloidogyne species.