Volatile and Phenolic Compounds In The Resistance of The Melon to The Vegetable Leafminer, Liriomyza Sativae Blanchard (Diptera: Agromyzidae)

The aim of this study was to evaluate whether volatile compounds released by melon genotypes interfere in the attractiveness and repellency of Liriomyza sativae Blanchard (Diptera: Agromyzidae), and to characterise the phenolic compounds of melon genotypes, as well as the antibiotic action of these compounds on L. sativae . Through experiments, it was shown that the volatiles of the melon genotypes CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 showed little attractiveness to L. sativae , while the volatiles of the Goldex commercial hybrid were more attractive. By analysing the volatile profiles, it was possible to identify the compounds acetic acid, (Z)-3-hexen-1-ol, α-pinene, (Z)-β-ocimene, (E)-β-ocimene, linalool, allo-ocimene and neo-allo-ocimene. The CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 melon genotypes show resistant characteristics due to the non-preference of L. sativae because of the smaller number of volatiles and the higher concentration of acetic acid in their volatile composition. The phenolic compounds characterised were hydroxybenzoic-hexoside acid, ferulic acid and trihydroxy-octadecadienoic acid. The CNPH 06-1047-333 and CNPH 06-1047-341 melon genotypes presented, respectively, the highest and lowest levels of total phenolics, but there was no difference in the larval or pupal viability of L. sativae , indicating a lack of any relationship between total phenols and antibiotic resistance of the melon genotypes to L. sativae . In general, based on the analysis of volatile and phenolic compounds, the CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 genotypes are less attractive to L. sativae than the commercial hybrid genotypes (Goldex).