Determinación del tipo de planta adecuado para el monitoreo de poblaciones de Fito nematodos en plátano (Musa AAB) (ING)
Abstract
On two plantations of first harvest of Musa AAB each consisting of separate lots of False Horn Plantain (Semi-Giant and Dwarf) nematode populations were determined in plants with one to three days flowering and in their respective succeeding suckers. The objective was to determine if there is a relationship between the nematode population in mother plants and their succeeding suckers. Sixty and twenty plants of each cultivar were evaluated in Pococí (70 masl) and Matina (40 masl) locations, respectively.
Nematodes were extracted by maceration of the roots, pouring the suspension through a series of 0.5/0.150/0.038 mm (N° 30/100/400 mesh) sieves nested together with the 0.5 mm on top. Populations levels were expressed per 100 g of roots.
The results showed no linear relationship between the nematode populations of the flowering plants and their succeeding sucker. Although the differences were not statistically significant, the densities of R. similis determined in flowering plants tended in most cases to overestimate the populations in the succeeding suckers. Sampling flowering plants at Pococí (70 masl) overestimated Helicotylenchus spp. populations in the succession suckers of both cultivars, while those at Matina (40 masl) were underestimated. The estimation of Meloidogyne spp. and Pratylenchus spp. populations was also not reliable.
To decide on nematicide applications, it is recommended to sample the succeeding suckers of recently flowering plants.
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