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1. Efficiency of Vinasse Application on Root-Knot Nematodes in Soybean.

Author

Leite, Maria Lúcia Tiburtino, Almeida, Fernandes Antonio de, Fonseca, Wéverson Lima, Oliveira, Augusto Matias de, Zuffo, Alan Mario, Pereira, Francisco Fernandes, Alcântara Neto, Francisco de, Barreto, Artur Franco, Al-Askar, Abdulaziz A., Carvalho, Rezanio Martins, Marey, Samy A., Gondim, Ancélio Ricardo de Oliveira, Hashem, Amr H., Leite, Marcos Renan Lima, and AbdElgawad, Hamada

Subjects
ROOT-knot nematodes, VINASSE, SOUTHERN root-knot nematode, PEST control, PLANT reproduction, SOYBEAN cyst nematode, NEMATOCIDES
Abstract

Vinasse is not only effectively used in pest control but also creates a conducive environment for the growth of antagonistic microorganisms. Thus, this study aimed to evaluate the potential of vinasse applied via soil for the management of root-knot nematodes in soybean culture. The experimental design was entirely random, in a factorial scheme (2 × 6), consisting of two species of nematodes, Meloidogyne incognita and M. javanica, under vinasse application at five concentrations (20, 40, 60, 80, and 100%) and one control (water), with five repetitions. Soybean plants Intacta cv. M-Soy 8644 IPRO were inoculated with 4000 eggs/juveniles of each species separately. At 60 days after the first application of vinasse, evaluations of parasitism and agronomic characteristics in soybean were performed. Stillage resulted in the highest average values for root volume and root fresh mass in plants inoculated with M. incognita, showing respective increases of 24.33% and 14.92% compared to plants inoculated with M. javanica. However, concentrations exceeding 60% had a detrimental effect on all agronomic variables of soybean. For parasitism, an interaction among the factors was observed, with a significant effect (p < 0.01) for most of the evaluated variables, except for the number of eggs in the soil. The concentration equivalent to 60% vinasse promoted a sharp reduction in parasitism for the two nematode species, making reproduction on plant roots unfeasible. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Influência de manipueira sobre Meloidogyne javanica na soja

Author

Fonseca, Wéverson Lima, Almeida, Fernandes Antonio de, Leite, Maria Lucia Tiburtino, Oliveira, Augusto Matias de, Prochnow, Jeissica Taline, Ramos, Lisandro da Luz, Rambo, Tiago Pieta, Neto, Francisco Franciscode Alcântara, Pereira, Francisco Fernandes, and Carvalho, Rezanio Martins

Subjects
chemistry.chemical_classification, Meloidogyne javanica, root-knot nematode, manejo alternativo, Glycine max, Inoculation, alternative management, Manihot esculenta, food and beverages, Parasitism, Glycoside, Single application, General Medicine, Biology, biology.organism_classification, Manure, manipueira, Horticulture, Nematode, chemistry, nematoide das galhas, Soybean crop
Abstract

Searching alternatives for the control of plant parasitic nematodes, nematicide effect of secondary metabolites or plant residues has been studied. Thus, the manipueira, a liquid residue obtained from the industrialization of cassava (Manihot esculenta), has as its composition cyanogenic glycosides with antimicrobial properties. The objective of this study was to evaluate the potential of the manipueira applied to the soil, aiming at the control ofMeloidogyne javanicain the soybean crop. The manipueira was applied at the concentrations of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100%. The experimental design was completely randomized, in an 11 × 2 factorial arrangement (concentrations of manipueira × forms of application - single and fractionated), with five replicates. Soybean plants were inoculated with 3000 eggs and J2 ofM. javanicaper pot. Sixty days after the first application of the manipueira, agronomic characteristics and parasitism were evaluated. The single application of the manipueira promoted greater growth and root development, as well as a reduction in the number of eggs and juveniles in the roots and in the reproduction factor ofM. javanica, for all concentrations. The split application had more effect on reducing the number of galls and egg mass. The lethal manure concentrations for 50% of the soil and root nematode populations were 37.90% and 29.67%, respectively., Na busca de alternativas para o controle de fitonematoides, vem sendo estudado o efeito nematicida de metabolitos secundários ou resíduos vegetais. Dessa forma, a manipueira, resíduo líquido da industrialização da mandioca (Manihot esculenta), tem como composição glicosídeos cianogênicos com propriedades antimicrobianas. Objetivou-se avaliar o potencial da manipueira aplicada no solo, visando o controle deMeloidogyne javanicana cultura da soja. A manipueira foi aplicada nas concentrações de 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 e 100%. O delineamento experimental foi inteiramente casualizado, em arranjo fatorial 11 × 2 (concentrações de manipueira × formas de aplicação - única e parcelada), com cinco repetições. As plantas de soja foram inoculadas com 3000 ovos e J2 deM. javanicapor vaso. Sessenta dias após a primeira aplicação da manipueira, foram avaliadas características agronômicas e de parasitismo. A aplicação única da manipueira promoveu maior crescimento e desenvolvimento radicular, bem como redução do número de ovos e J2 na raiz e do fator de reprodução deM. javanica, para todas as concentrações. A aplicação parcelada teve maior efeito na redução do número de galhas e massas de ovos. As concentrações letais de manipueira para 50% da população de nematoides no solo e na raiz foram de 37,90% e 29,67%, respetivamente.

Published
2018
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