Effective concentration and range of activity of abamectin as seed treatment against root-knot nematodes in tomato under glasshouse conditions

in Nematology
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The objectives of this study were to determine the efficacy, range of activity and effective concentrations (EC50 and EC80) of abamectin as a seed treatment of tomato against Meloidogyne incognita, M. arenaria and M. javanica. The study revealed that abamectin seed treatment at concentrations ranging between 0.3 and 1 mg a.s. seed−1 is highly effective against the three species of root-knot nematodes, retaining its efficacy in the soil for 8 weeks. The highest EC50 found was reached at 0.2 mg a.s. seed−1. The highest EC80 for the number of egg masses per g root in the three Meloidogyne species was attained at 0.51 mg a.s. seed−1. Abamectin as a seed treatment is promising for the control of root-knot nematodes in the field since only low amounts of active ingredient are required to give adequate protection in the most sensitive stages of tomato root growth and development.


International Journal of Fundamental and Applied Nematological Research



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