Reação de clones de bananeira(Musa spp.) ao nematóide Meloidogyne incognita (Kofoid &amp; White, 1919) Chitwood, 1949, Raça 2

Boas, Lenisa Cezar Vilas; Tenente, R. C. V.; Gonzaga, V.; Neto, S. P. da Silva; Rocha, H. S.

doi:10.1590/s0100-29452002000300030

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…Furthermore, the presence of A. besseyi in the aerial parts of plants had a greater negative correlation with NP, PFW, NG, and GY (-0.28, -0.18, -0.27, and -0.25, respectively) than that in M. incognita roots (-0.11, -0.07, -0.12, and -0.1, respectively). According to Vilas-Boas et al (2002) and Dias et al (2010), root-knot nematodes reduce plant development, SFW, and RFW under severe infestation, consistent with the results of Favoreto and Meyer (2019) for A. besseyi. However, positive correlations can be classified according to their magnitude (Carvalho et al, 2004).…”

Section: Resultssupporting

confidence: 79%

Soybean development under different Aphelenchoides besseyi and Meloidogyne incognita populations

Loreto

Dias

Favoreto

et al. 2022

Semina: Ciênc. Agrár.

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The green stem Aphelenchoides besseyi and gall Meloidogyne incognita phytonematodes cause soybean yield losses. Thus, the objective of this study was to evaluate the effects of different populations of A. besseyi and M. incognita on soybeans. The experiment had 10 treatment groups [T1: control, T2: A. besseyi (500), T3: M. incognita (2,000), T4: A. besseyi (250) + M. incognita (2,000), T5: A. besseyi (500) + M. incognita (2,000), T6: A. besseyi (250) + M. incognita (4000), T7: A. besseyi (500) + M. incognita (4,000) individuals, T8: A. besseyi (250) + M. incognita (8,000), T9: A. besseyi (500) + M. incognita (5,000), and T10: A. besseyi (1,000) + M. incognita (8,000) individuals] with six replicates. Inoculations were done on day 10 after soybean germination, and evaluations were conducted after 60 d. Plant height, shoot fresh weight, root fresh weight, number of pods (NP), pod fresh weight, number of grains (NG), grain yield (GY), amount of A. besseyi in the shoot, and M. incognita in the roots were analyzed. The 500 A. besseyi + 8,000 M. incognita treatment reduced all variables and led to considerable damage to soybean development. In addition, GY, NG, and NP were reduced in the different nematode population density groups, influencing soybean agronomic characteristics.

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Section: Resultssupporting

confidence: 79%

Soybean development under different Aphelenchoides besseyi and Meloidogyne incognita populations

Loreto

Dias

Favoreto

et al. 2022

Semina: Ciênc. Agrár.

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“…Os nematoides tendem a reduzir o desenvolvimento e, portanto, a massa da matéria seca das raízes, principalmente em infestações severas (VILAS-BOAS et al, 2002). Apenas no tratamento das sementes com P. lilacinus (PL TS), obteve-se uma massa de matéria seca significativamente maior que a obtida na testemunha inoculada com M. incognita (Figura 2) evidenciando a ação do fungo na redução da atividade do nematoide.…”

Section: Massa Da Matéria Seca Das Raízes De Sojaunclassified

“…M. incognita geralmente é um sério problema em áreas cultivadas anteriormente com algodão ou café. Zanella et al (2005) (ATKINS et al, 2003).…”

Section: Introductionunclassified

Uso de agentes microbianos e químico para o controle de Meloidogyne incognita em soja

2010

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RESUMO.Nematoides de galhas constituem importante grupo de patógenos da cultura da soja e o manejo integrado é uma das principais medidas de controle que visam à redução de perdas econômicas. Neste trabalho foi avaliada a eficácia dos fungos Paecilomyces lilacinus (Thom.) Samsom e Pochonia chlamydosporia (Goddard) Zare & Gams (sinonímia Verticillium chlamydosporium), de um produto comercial à base de Bacillus sp. (Nemix) e do nematicida químico Aldicarb no controle de Meloidogyne incognita em soja, variedade M-SOY 6101. O experimento foi realizado em casa-de-vegetação no delineamento experimental de blocos casualizados com nove tratamentos (três produtos biológicos usados no tratamento de sementes com ou sem a aplicação em pós-emergência, Aldicarb aplicado apenas em pós-emergência e duas testemunhas) e quatro repetições. Aldicarb reduziu o número de ovos e de juvenis do nematoide. P. lilacinus foi o mais atuante dos agentes biológicos, favorecendo a manutenção da quantidade de matéria seca da raiz de soja e reduzindo o número de ovos. O produto Nemix e P. chlamydosporia somente tiveram ação efetiva na redução do número de ovos do nematoide. Com base nos resultados, foi possível concluir que o agente químico e os agentes biológicos avaliados neste trabalho tiveram moderada atividade no controle de M. incognita em soja. ABSTRACT. Use of microbial and chemical agents to control Meloidogyne incognita in soybean.Root-knot nematodes are considered significant pathogens of soybean crops. The objective of this work was to evaluate the efficacy of two fungi (Paecilomyces lilacinus (Thom.) Samsom and Pochonia chlamydosporia (Goddard) Zare & Gams (syn. Verticillium chlamydosporium), a commercial product based on Bacillus sp. and Aldicarb on the control of Meloidogyne incognita on soybean, cultivar M-SOY 6101. The experimental design was set as randomized blocks with four replications. Nine treatments were evaluated: three biological agents used for seed treatment with and without post-emergence application, Aldicarb on post-emergence only, and two controls. All treatments were inoculated with the nematode, except for a blank control where only water was applied. One control-only treated with the nematode was also included. Aldicarb could reduce the number of eggs and juveniles in the roots. P. lilacinus showed the best performance among the biological control agents, reducing the number of eggs and increasing dry root weight. Nemix, a Bacillus sp. based commercial product and P. chlamydosporia could only reduce significantly the number of eggs of the nematode. In this work, it was possible to conclude that the chemical and biological agents showed a moderate activity in the control of M. incognita in soybean.

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“…Therefore, the possibility of using genetic resistance to control plant-parasitic nematodes in bananas has been explored by several authors (Fogain and Gowen 1997;Costa et al 1998;Marin et al 1998;Elsen et al 2002;Vilas Boas et al 2002;Costa 2004). Search for resistance to plant-parasitic nematodes is dependent on the genetic variability of the host, as well as, on the genetic variability among nematode populations.…”

Section: Introductionmentioning

confidence: 99%

Contrastant banana accessions for resistance to the burrowing nematode, based on molecular markers RAPD

et al. 2009

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This work aimed to proceed molecular characterization of seven banana accessions (Borneo, Grand Naine, 1304-06, 4249-05, 0337-02, 0323-03 and 4279-06) resistance to the nematode Radopholus similis. These accessions were selected taking in account the reproduction factor (RF) among 26 banana genotypes from a working collection belonging to Embrapa Mandioca e Fruticultura Tropical.The genomic DNA of the seven accessions was extracted, and 36 decamere primers had been used to obtain RAPD markers. The resulting markers were converted into a matrix of binary data. From that matrix the genetic distance between the accessions were estimated, for further clustering and graphic dispersion analyses. From a total of 521 RAPD markers generated, 420 (81%) were polymorphic, including 140 (27%) potentially promising for application on works related to genetic mapping of the resistance to R. similis. OPE-15, OPH-17, and OPG-09 were the primers that contributed to the highest number of bands promising for genetic mapping of resistance (12, 8, and 8, respectively). The genetic distances between accessions ranged from 0.106 to 0.455, with the longest one observed between cv. Borneo and the genotype 4279-06, considered as highly susceptible and resistant, respectively, to the nematode according to the RF. The graphic dispersion distinguished three groups of accessions, and most of resistant genotypes clustered together in the same group. The most contrastant genotypes for resistance (Borneo and 4249-05) were separated by a genetic distance of 0.374, and possessed a total of 114 polymorphic bands promising for genetic mapping of resistance. In addition, the results of pathogenicity tests were congruent with those obtained by RAPD analyses.

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Reação de clones de bananeira(Musa spp.) ao nematóide Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949, Raça 2

Cited by 6 publications

References 1 publication

Soybean development under different Aphelenchoides besseyi and Meloidogyne incognita populations

Soybean development under different Aphelenchoides besseyi and Meloidogyne incognita populations

Uso de agentes microbianos e químico para o controle de Meloidogyne incognita em soja

Contrastant banana accessions for resistance to the burrowing nematode, based on molecular markers RAPD

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