Characterization of damage caused by Meloidogyne Spp. (Nemata:Tylenchida) in grapevines in Mendoza, Argentina
DOI:
https://doi.org/10.22267/rcia.143102.31Keywords:
Vineyard, plant protection, nematodes, Vitis vinifera.Abstract
The aim of this research was to compare and establish relationships between different growth indicators of grapevines with two levels of infestation (high and low) of Meloidogyne spp. The study was conducted in a vineyard cv Merlot, located in Agrelo, Mendoza, where two plots (A and B), with and without nematodes, and with different levels of vegetative growth were chosen. The evaluated indicators were: weight and number of bunch stems per plant, pruning weight, number of internodes, and leaf and feminelle area. The degree of nematode infestation per plot was determined by the flotation - centrifugation technique. Statistical analyses were performed through the Wilcoxon (Mann Whitney U) test and Student Test. Furthermore, a linear regression analysis was used to verify the existence of a relationship between the assessed indicators and the population density of Meloidogyne spp., expressed as the number of juvenile states (J2) in the soil. The results indicate that plot with the lower population density of juveniles of Meloidogyne spp., showed a greater average weight of pruning wood, as well as superior leaf and feminelle area. Regarding the average weight of bunch stems per plant, this plot also out performed the plot with a high concentration of nematodes.
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