Evaluation of some non-fumigant nematicides and the biocide avermactin for managing Meloidogyne incognita in tomatoes
Evaluation of some non-fumigant nematicides and the biocide avermactin for managing Meloidogyne incognita in tomatoes
A. S. A. Saad1, M. A. Radwan2†, H. A. Mesbah1, H. S. Ibrahim3 and M. S. Khalil3
ABSTRACT
A pot experiment was conducted to evaluate the efficacy of avermactin a new bio-nematicide in Egypt, in
comparison with five non-fumigant nematicides namely, cadusafos, ethoprophos, fenamiphos, fosthiazate and
oxamyl for managing the root-knot nematode, Meloidogyne incognita in tomatoes based on number of galls per
root system, number of egg-masses, eggs per egg-mass and number of juveniles (J2) in the soil as well as plant
growth characteristics. All nematicidal treatments reduced the incidence of root-knot nematodes when compared
with the untreated check. However, fenamiphos and oxamyl were proved to be the highest chemical compostions
that decreased galls by 91.73 and 89.53% and egg-masses by 90.80 and 88.65%, respectively. Whereas, avermactin
has relatively least effective causing 66.69% and 66.31% reduction in gall formation and egg-masses, respectively.
Meanwhile, cadusafos and oxamyl achieved the greatest reduction for eggs per egg-mass by 68.26 and 63.17%,
consecutively. As for eggs per egg-mass, avermactin provided 16.34% reduction. All the tested nematicides
significantly reduced the population of J2 in the soil ranging from 69.49 to 90.31
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June 2017
Pakistan Journal of Nematology, Vol. 35, Iss. 1, Pages 03-111
