Nematofauna associada à cultura do quiabo na região leste de Minas Gerais

Abstract

The influence of parasitic nematodes on okra crop in eastern Minas Gerais State, BrazilOkra has a cultural and social importance for the State of Minas Gerais (MG), and 34,2% of the volume marketed in the Ceasa/ Contagem, MG, come from the municipalities located near Caratinga and Governador Valadares. The okra production is influenced for the infection caused by the root-knot nematodes (Meloidogyne spp.). The main species of these nematodes attacking okra have already been reported in Brazil, and some of them can cause plant death. The correct identification of Meloidogyne species and, or races infecting okra roots is mandatory for choosing appropriate control measures. To determine the occurrence and distribution of Meloidogyne spp. and other nematodes in the area of the East of MG, 70 soil and root samples coming from 14 municipalities were appraised for morphological and isoenzymatic characteristics. Among the populations of Meloidogyne spp., M. incognita (Esterase phenotypes I1 and I2) prevailed and were followed by M. javanica (phenotypes J2 and J3) and M. arenaria (phenotypes A2). The species M. mayaguensis was confirmed by the phenotypes: esterase (M2), malate dehydrogenase (N3), superoxide dismutase (N2) and glutamate oxaloacetate transaminase (N3). This is the first report of the M. mayaguensis occurrence in MG. Other nematodes associated with the okra plants were Aphelenchus sp., Criconemella sp., Helicotylenchus spp., Pratylenchus brachyurus and P. coffeae, Rotylenchulus reniformis, Rotylenchus sp., Tylenchus sp. and Tylenchorhynchus sp.

Selection of resistant rootstocks to Meloidogyne enterolobii and M. incognita for okra (Abelmoschus esculentus L. Moench)

“…Similarly, Oliveira et al (2007) evaluated the nematode fauna associated with an okra crop, in the State of Minas Gerais, Brazil, and were alerted to the occurrence of M. enterolobii. This nematode causes such considerable losses in the production of okra that infected cultivated areas are often soon abandoned (Carneiro et al, 2001).…”

Teores foliares de macronutrientes em quiabeiro cultivado sob diferentes fontes e níveis de matéria orgânica

“…O Brasil caracteriza-se como um país de adequadas condições para o cultivo da grande maioria das plantas cultivadas de interesse econômico, inclusive, o quiabeiro que é considerado uma planta rústica, tolerante ao calor e não exige tecnologia muito avançada para seu cultivo, sendo mais explorado nas regiões Nordeste e Sudeste (OLIVEIRA et al, 2003;MOTA et al, 2005) e pode ser produzido durante o ano todo, em regiões de clima quente (OLIVEIRA et al, 2007a).…”

Crescimento e acúmulo de nutrientes da cultura do quiabeiro

“…A cultura do quiabeiro possui importância sócio-cultural para o Estado de Minas Gerais, sendo que 34,2% do volume de quiabo comercializado na Ceasa/Contagem procedem dos municípios localizados entre Caratinga e Governador Valadares, naquele estado (OLIVEIRA et al, 2007).…”