Reação de variedades de cana-de-açúcar ao parasitismo de Meloidogyne incognita e M. enterolobii

Silva, Arinaldo P. da; Pedrosa, Elvira M. R.; Chaves, Andréa; Maranhão, Sandra Roberta Vaz Lira; Guimarães, L. M. P.; Rolim, Mário M.

doi:10.5039/agraria.v7isa2276

Cited by 11 publications

(10 citation statements)

References 8 publications

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“…The M. javanica, and M. incognita race 3 had a decrease in RF with increasing initial inoculum level. Similar results have been found for M. incognita in sugarcane plants (SILVA et al, 2012) and for M. enterolobii in guava plants of the Paluma cultivar (BURLA et al, 2010). This reduction in RF with increasing inoculum level is due to the competition among nematodes that emerge in the root system in the different sites of infection (KAYANI; MUKHTAR; HUSSAIN, 2018).…”

Section: Resultssupporting

confidence: 80%

“…Decreases in the development of other plant species with increasing initial inoculum of Meloidogyne spp. have been observed with high inoculum levels (10,000 and 20,000 eggs per kg of soil) on sugarcane plants of the SP81-3250 cultivar, with significantly decreases in shoot fresh weight when compared to the control (SILVA et al, 2012). Similarly, increasing M. javanica inoculum level reduced the vegetative development of cherry tomato plants of different genotypes (BELAN et al, 2011).…”

Section: Resultsmentioning

confidence: 96%

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REACTION OF Crambe abyssinica TO Meloidogyne javanica AND M. incognita RACE 3

et al. 2019

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Several oilseed plants have been researched for biodiesel production in Brazil, and Crambe abyssinica Hochst is one of the most promising species. The effect of the phytonematodes M. incognita race 3 and Meloidogyne javanica on C. abyssinica plants was evaluated in greenhouse experiments. A randomized block design with five nematode inoculum levels (350, 700, 1400, 2800, and 5600 eggs) and ten replications was used. C. abyssinica plants without inoculation were used as controls, and the viability of the nematodes used was tested in tomato plants inoculated with 2000 eggs. The plots consisted of pots containing one plant. The number of root knots (NG), number of egg masses (NEM), and number of eggs + second-stage juveniles (NEJ2) per root system, number of J2 per 200 cm3 of soil (NJ2), and shoot dry weight (SDW) of the inoculated C. abyssinica plants were evaluated at 45 days after inoculation. The reproduction factor (RF) of the nematodes was also evaluated. The resistance of the plants to the phytonematodes was classified using the RF criterion. Crambe abyssinica plants are susceptible to the different inoculum levels of Meloidogyne javanica and M. incognita used, and the data of all nematode variables (NG, NEM, NEJ2, NJ2, and RF) were fitted by linear models.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 96%

REACTION OF Crambe abyssinica TO Meloidogyne javanica AND M. incognita RACE 3

et al. 2019

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“…Essa reação de baixa suscetibilidade para esse genótipo também foi constatada no presente estudo (Tabela 1) para a espécie de P. brachyurus, constatando assim que esse genótipo é promissor para o plantio em áreas com problemas com o nematoide. A baixa suscetibilidade do genótipo RB 867515 também foi observada por Silva et al (2012), em seu estudo avaliando a reação do genótipo ao nematoide das galhas M. incógnita.…”

Section: Resultsunclassified

Reação de genótipos de cana-de-açúcar ao nematoide das lesões radiculares

et al. 2019

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Resumo: Entre os problemas fitossanitários da cultura da cana-de-açúcar destacam-se os nematoides. Dentre as estratégias de manejo de nematoides, a utilização de resistência é uma das alternativas mais apropriadas e desejáveis. No entanto, até o momento, não se dispõe de genótipos de cana-de-açúcar reconhecidamente resistentes a Pratylenchus brachyurus. Objetivou-se com este trabalho avaliar a reação de genótipos de canade-açúcar a P. brachyurus. O experimento foi realizado em condições controladas de casa de vegetação e o delineamento experimental utilizado foi inteiramente casualizado com 15 tratamentos (genótipos), sendo 14 genótipos de cana-de-açúcar e um híbrido de milho (AG 1051) e seis repetições. A densidade populacional de P. brachyurus, aos 80 dias após o transplantio da cana-de-açúcar variou de 14215 a 1575 espécimes por 10 gramas de raiz. Todos os genótipos avaliados multiplicaram o nematoide e não foram resistentes. Os genótipos de cana-de-açúcar: IAC SP 95 5000, CT 01 3377, CT 04 9005, RB 86 7515 e IAC 91 1099 obtiveram valores menores para densidade populacional de P. brachyurus em comparação aos demais avaliados e foram menos suscetíveis.Palavras-chave: densidade populacional, Pratylenchus brachyurus, Saccharum spp., resistência genética Abstract: Among the phytosanitary problems of the sugarcane crop, the nematodes are a highlight. Among the nemato de management strategies, genetic resistance is one of the most appropriate and desirable strategy. However, resistant sugarcane genotypes resistant to Pratylenchus brachyurus are not available up to the moment. The objective of this study was to evaluate the reaction of sugarcane genotypes to the Pratylenchus brachyurus nematode. The experiment was carried out under controlled conditions of greenhouse and the experimental design was completely randomized with 15 treatments (genotypes), 14 sugarcane genotypes and one corn hybrid (AG 1051) and six replicates. Population density of P. brachyurus at 80 days after sugarcane transplanted ranged from 14215 to 1575. All evaluated genotypes multiplied the nematode and were not resistant. The sugarcane genotypes: IAC SP 95 5000, CT 01 3377, CT 04 9005, RB 86 7515 and IAC 91 1099 obtained lower values for population density of P. brachyurus compared to the other evaluated genotypes and were less susceptible.

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“…Damages caused by these nematodes in low crop yield areas are so severe that, many times, sugarcane does not complete its industrial cycle, thus contributing to the abandonment of infested areas or to the increase of environmental impact, because of nematicide use (Silva et al, 2012). Moreover, this information is important because the microclimate created by straw on the soil stimulates the germination of seeds and the development of some weed seedlings, such as L. aegyptiaca; therefore, in sugarcane areas with mechanized harvest, this plant has become important and is considered hard to control (Monquero et al, 2011b;Zera et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Weeds Hosts of Nematodes in Sugarcane Culture

et al. 2017

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-The presence of weeds and nematodes can affect of sugarcane yield. This research evaluated whether weeds that are very frequent in mechanized harvested sugarcane can be hosts for root-knot nematodes: Meloidogyne incognita or Meloidogyne javanica. Regarding nematode hospitability, ten weed species as well as a control sample (tomato) were evaluated; they were inoculated with M. incognita and M. javanica. The plants were inoculated with 2,000 eggs and second-stage juveniles (J 2 ), and there were three plants per experimental unit (6,000 eggs and J 2 per pot -repeatition); 60 days after inoculation (DAI), the plants were removed and evaluated according to reproduction factor (RF), nematode final population (FP) and reproducibility index (RI). Regarding weed hospitability, it was found that Luffa aegyptiaca acted as a host for both nematodes, with RF > 1, which was higher than the control sample. Digitaria horizontalis was classified as a host for M. incognita and as a non-host for M. javanica. Mucuna aterrima and Crotalaria spectabilis presented the lowest RF and FP. Ricinus communis and Ipomoea triloba presented galls when inoculated with M. incognita, but were not considered host, since they presented RF < 1. None of the weed species was considered immune, i.e., with RF = 0. The lowest RF values of M. incognita (race 3) were related to Crotalaria spectabilis and Euphorbia heterophylla plants. This demonstrates the ability of crotalarias in decreasing nematode population in the field and justifies its use in several areas before planting main crops. Keywords

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Reação de variedades de cana-de-açúcar ao parasitismo de Meloidogyne incognita e M. enterolobii

Cited by 11 publications

References 8 publications

REACTION OF Crambe abyssinica TO Meloidogyne javanica AND M. incognita RACE 3

REACTION OF Crambe abyssinica TO Meloidogyne javanica AND M. incognita RACE 3

Reação de genótipos de cana-de-açúcar ao nematoide das lesões radiculares

Weeds Hosts of Nematodes in Sugarcane Culture

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