Bioatividade de extratos de resíduo sólido de sisal no controle de Meloidogyne javanica no tomateiro

Abstract

Identifying the plant’s biocide effect by evaluating botanical extracts in the management of nematodes becomes a useful tool for there are secondary chemicals, more compatible with sustainable agricultural production systems. These natural products are environmentally safe and less ecotoxicological risky compared to synthetic organic nematicides. The sisal (Agave sisalana Perrine ex Engelm) is rich in phytochemicals such as alkali, saponins, steroids and tannins. This study aimed to evaluate the effect of solid waste sisal extracts in the management of M. javanica. The four evaluated treatments (distilled water, 7.5% alcohol, aqueous extract from sisal’s solid waste at 75% and hydroalcoholic extract sisal residue at 7.5%) had significant effect at 5% probability the by the multiple means test, in the variables eggs’ mass per root gram and for branches for root gram. In relation to the control treatment, a reduction of 41.8 to 59.7% in the eggs’ mass number and reduction of 54.4 to 55.4% in the number of branches for root gram, in treatments with hydroalcoholic and aqueous sisal solid waste extract, respectively. This work indicates that the aqueous extract compared to the alcoholic extract of sisal solid waste presents better results in the management of M. javanica.