Aromatic compounds that attract Meloidogyne species second-stage juveniles in soil.

Pest Management Science
Yuji Oka

Abstract

Nematode attractants could serve in nematode control strategies by combining with chemical or biological nematicides or by interrupting the nematodes' host-finding process. The attractiveness of some benzenoid aromatic compounds, mainly benzoic acids, alcohols, aldehydes and phenols, to second-stage juveniles (J2) of four Meloidogyne species (M. hapla, M. incognita, M. javanica and M. marylandi) was evaluated by using trap tubes and balls filled with washed dune sand buried in nematode-inoculated sand in Petri dishes. Two-methoxybenzaldehyde, 2-methoxycinnamaldehyde, 2-hydroxybenzoic acid (salicylic acid), 2-hydroxy-3-methoxybenzaldehyde (o-vanillin), 3-methoxybenzoic acid, 4-methoxybenzoic acid and trans-cinnamic acid effectively attracted J2 of all or most of the four Meloidogyne species to trap tubes in a one-compound assay. When nematodes were exposed to three different compounds simultaneously in the three-compound assay, J2 of all Meloidogyne species were attracted mainly to 2-methoxycinnamaldehyde, salicylic acid and 4-methoxybenzoic acid. Exceptions were M. hapla J2, which were not attracted to salicylic acid. In the soil column assay, M. javanica and M. incognita J2 were attracted upward to 4-methoxybenzoic acid in a t...Continue Reading

References

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