Multiplicação do nematoide Meloidogyne paranaensis e velocidade de enraizamento de estacas caulinares em sete espécies de plantas medicinais

Abstract

Meloidogyne paranaensis was characterized and described by Carneiro et al. as a new species in 1996. The first reports demonstrate the high virulence causing coffee plants in the State of Paraná and São Paulo, especially the other species of nematodes for their aggression and strong damage to the root system of coffee. Recently, the species began to search for medicinal plants in Brazil. The first stage, which aimed to test the important reaction of seven species of medicinal plants as the M. paranaensis was held in a greenhouse at the Experimental Station of Biology of the University of Brasilia, the Federal District. Was used delinemaneto completely randomized with six replications. The plants were multiplied by cuttings and transplanted into pots filled with 2.5 L of cerrado oxisol mix more sand, vermiculite and compost in the ratio 3: 1: 1: 1 respectively, plus the formulation 4-14-8, at a dose of 100g to each 40 l of the mixture. At the time of transplanting the plants were inoculated with 5000 eggs to two populations of the nematode M. paranaensis (esterase phenotypes P1 and P2). After 90 days of culture, the roots of plants to determine the gall index and reproduction factor were harvested. There was susceptibility difference to two populations of M. paranaensis between the tested access, with no statistically significant difference in the reaction of access in relation to the populations tested. The Pfaffia glomerata access, Hypericum perforatum and Melissa officinalis presented themselves as highly susceptible hosts to two populations of M. paranaensis. Pogostemon cablin performed in intermediate situation can be classified only as susceptible. Artemisia annua and Catharanthus roseus presented themselves as highly resistant and Cordia verbenacea as tough. Catharanthus roseus is distinguished by a high index of galls, but without allowing the multiplication of the nematode. Susceptibility testing of plant species to root-knot nematode (Meloidogyne spp.) in order to ensure reliable results must be written with new plants that have newly developed roots and provide secondary roots and root hairs. The second stage, which was to evaluate the speed of rooting cuttings seven accessions of medicinal plants in sand to obtain useful information for establishing a seedling production schedule for trials with nematodes of the Meloidogyne genre. The experiment was conducted at Experimental Biology of the University of Brasilia Station in November greenhouse to February 2016. The cuttings were evaluated at 20, 30, 40 and 50 days after implantation and rooting notes were assigned as own scale aiming trials with nematodes of the genus Meloidogyne. Cuttings of medicinal species Artemisia annua; Catharanthus roseus, Cordia verbenacea; Hypericum perforatum; Melissa officinalis; Pfaffia glomerata; Pogostemon cablin produced viable seedlings for testing with Meloidogyne spp. The species differed in survival, efficiency and rooting rate of cuttings in sand. He was elected an average period of 30 days for the root volume of th...

Current Status of the Occurrence and Reaction Root-knot Nematodes in the Main Botanical Families of Medicinal Plants

“…The reaction of seven species of medicinal plants to M. paranaenses was studied by [150] with evaluations through determinations of gall index and reproduction factor. The accessions of Pfaffia glomerata (Brazilian ginseng), Hypericum perforatum (eola-weed) and Melissa officinalis were highly susceptible to M. paranaensis.…”