EXTRATOS ETANÓLICOS DE TIMBÓ DO CERRADO (Magonia pubescens St. Hil) NO CONTROLE DE Meloidogyne javanica

Abstract

Abstract ALVES, Edcarlos Silva.: Timbó cerrado ethanolic extracts (Magonia pubescens St. – Hil) in Control of Meloidogyne javanica. 2019. 40p. Completion of course work (Course of Bachelor in Agronomy). Instituto Federal de Educação, Ciência e Tecnologia Goiano – Campus Morrinhos, Morrinhos, GO, 2019.

The gall nematode species Meloidogyne javanica is one of the main pathogens that cause high crop losses every year. Due to the risks caused by chemicals to human nature and health, the objective was to evaluate the alternative control of Meloidogyne javanica, with ethanolic extracts of Cerrado timbo (Magonia pubescens). The experiment was carried out under IF Goiano - Campus Morrinhos - GO Laboratory and greenhouse conditions. It was used a completely randomized design and factorial scheme 3x5 (botanical extract x concentrations), 3 botanical extracts of cerrado timbó (peel, leaf and fruit) with 5 concentrations of each (T0 = Control: zero and without inoculation of M. javanica. T1 = 10 mg = 0.5 mg / mL (100%), T2 = 5 mg = 0.25 mg / mL (50%), T3 = 2.5 mg = 0.125 mg / mL (25%) and T4 = 1.25 mg = 0.06 / mL mg (12.5%), a total of 15 treatments and six replicates.In the in vitro test extracts were diluted separately in 1 mL of solution (16 μL Dimethylsulfoxide (DMSO) to 1% + 16 mL of distilled water), and an additional 1 mL containing 600 juveniles of second stage (J2) of M. javanica, and in a greenhouse (in vivo), 20 mL of the stock solution per plant pot was used. of jló, previously inoculated with 5000 M. javanica eggs, and capacity for 1 liter of substrate in a 2: 1 ratio (soil: sand) autoclaved.The following variables were evaluated: mortality rate, Jilo root (MFR g plant-1) and egg count. In the test (in vitro), the concentration of 0.3 mg / mL presented 100% mortality of M. javanica J2. The concentration of the less phytotoxic extract of the jiló plants was from the leaf (7.7 mg, 0.38 mg / mL), with 59% in relation to the control. The extract that most reduced M. javanica multiplication was from the 10 mg (0.5 mg / mL) timbo fruit, reducing by 67% compared to the control treatment.