Avaliação de extrato aquoso e de compostos orgânicos voláteis (COV’S) do resíduo da uva no controle do nematoide das galhas

Abstract

The organic residue of the grape has potential in the control of phytopathogens, among these the phytonematodes. In this experiment, the effect of aqueous extract and volatile organic compounds (VOC’S) from grape residue on root-knot nematode control was evaluated. For this, the aqueous extracts of the skin, bunch and seed were tested on the hatching of second-stage juveniles (J2) of Meloidogyne sp. on the hatching of J2 of Meloidogyne sp.. Subsequently, the nematode eggs that were submitted to VOC’S were inoculated in tomato plants with 7 days of age. High performance liquid chromatography (HPLC) analysis was also performed on the aqueous extracts, where the phenolic compounds gallic acid, rutin, catechin and epithechin were identified. The aqueous extract and the volatile organic compounds (VOC’S) inhibited the hatching of J 2 of Meloidogyne sp. Only the eggs of Meloidogyne sp. when submitted to the VOC’S of the grape bunch reduced the infectivity of Meloidogyne sp. in tomato roots. The organic residue of the skin, the bunch and the seed of the grape has potential in the control of the root-knot nematode.