Effect of Meloidogyne sp. on growth and yield of tomato.
DOI:
https://doi.org/10.15517/am.v24i2.12542Keywords:
phytoparasitic nematodes, root damage, root knot nematode, fruit weight reduction.Abstract
The objective of this work was to determinate the
relationship between initial density and final density of
Meloidogyne sp in tomato crop. The study was carried out at
León, Nicaragua during 2011. The variables measured were
number of nematodes at transplant, number of nematodes
at harvest time, height at maturity of plants and yield in
kilograms. Nematode extraction was performed through the
Baermann modified method. In the study, the initial density
(Pi) showed a positive linear correlation with the final density
(Pf). However, it was observed that when Pi was equal to
400 nematodes/100 g of soil, the reproduction factor was
increased to 3.64, on the contrary, when Pi was equal to 700
nematodes/100 g of soil, reproduction factor was reduced to
2.48. Pi was inversely correlated to weight of tomato fruits
and height of plants. Plants with 200 nematodes/100 g of soil
had fruit weight 2.19 kg and height 153.20 cm compared to
0.93 kg and 135.24 cm in plants with 600 nematodes/100
g of soil. There was a positive correlation between Pi and
Pf of Meloidogyne sp. in tomatoes. The populations of this
nematode, were inversely correlated with plant height and
fruits weight.
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