Pot studies on the effects of methionine (
Met) and fungivorous nematode,
Aphelenchus avenge (Aa) on plant growth and pathogens' propagation in tomato-
Meloidogyne incognita (Mi)-Fusarium oxysporum f. sp.
lycopersici (Fo) pathosystem were carried out using a multi-factor factorial experiment design of 2
4. Regarding interactions between
Met and
Aa on pathogens' propagation and their damage to tomato plant, a synergistic effect was detected for final populations of
Mi juvenile and an interference effect for
Fo densities 49 days after planting, but there were no evident interactions for root-knot index or number of fallen leaves that were affected most by
Fo treatments. Interactions between
Met and
Aa on tomato-growth-characters were evident for the dry root weight only but not for the shoot length, shoot weight, number of flowers or total fruit weight.
Met as such significantly (
p≥0.05) contributed to reduce the
Mi juvenile population and root-knot index 70 days after planting and
Fo densities for both 21 days and 49 days after planting. Fruit weight was significantly improved (
p<0.05) by
Met treatment when the soils were inoculated with
Mi. Aa alone did not contribute significantly to the improvement of tomato growth,
Fo and
Mi control or root-knot index. Results led to the conclusion that the combined application of
Met and
Aa may be impractical for the simultaneous control of
Mi and
Fo on tomato.
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