Redução de inóculo de Aphelenchoides besseyi em sementes de Brachiaria brizantha tratadas com óleos essenciais

Monteiro, Thalita Suelen Avelar; Nasu, Érica das Graças Carvalho; Guimarães, Cynthia Pires; Neves, Wânia dos Santos; Mizobutsi, Édson Hiydu; Freitas, Leandro Grassi de

doi:10.1590/0103-8478cr20120383

Cited by 10 publications

(6 citation statements)

References 9 publications

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“…However, Meloidogyne active forms were eliminated during cleaning procedures of lot 1 (Table 2). Monteiro et al (2014) studying seed nematodes in Urochloa brizantha, suggested that the internal localization between the coat and endosperm was the reason that seed nematodes are not eradicated, making control and its evaluation difficult. Aphelenchoides was reduced in U. ruziziensis seeds after cleaning procedures, but some active forms were detected in the clean seed (commercial ones) ( Table 2).…”

Section: Resultsmentioning

confidence: 99%

Can industrial cleaning procedures make Urochloa ruziziensis seeds nematode free?

Mazzuchelli¹,

Custódio²,

Neto³

et al. 2017

Aust J Crop Sci

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Seeds for agriculture should be pathogens free e.g. from plant-parasitic nematodes that if present in seed lots may be transferred to other clean areas as inoculum to infest other host plants. The aim of this work was to identify and quantify active forms of nematodes during the cleaning procedures of Urochloa ruziziensis seeds and also to evaluate its efficiency in turning the seeds nematodes free. Three seed lots with distinct origins were used. They were sampled four times in different parts of the process such as the reception and during the cleaning procedures consisting of the following treatments: unclean seeds, after using air screen cleaner, after using gravity separator (clean seeds) and the dust particles (seed covers and empty seeds). Identification and quantification of nematodes were done in each of the samples. The results showed that there is reduction in active number of Aphelenchoides and Ditylenchus nemaodes after cleaning procedures of seeds. However, this reduction does not meet the standards to be disseminated as pathogen free seeds for commercialization. The active Meloidogyne form was found only in one seed lot, but the cleaning procedures was effective to eliminate the parasites from the clean commercial seed. Others control forms need to be introduced into the system to turn pasture seed free of nematodes.

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Section: Resultsmentioning

confidence: 99%

Can industrial cleaning procedures make Urochloa ruziziensis seeds nematode free?

Mazzuchelli¹,

Custódio²,

Neto³

et al. 2017

Aust J Crop Sci

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“…The emissions from plant manures are complex with different chemical groups compounds [13,14,15,16]. In the macerate of the soursop leaf 41 molecules from different chemical groups were identi ed, such as terpenes, ketones, alcohols, phenols and esters, which can form interactions, resulting in complex mixtures, which exercise the function of protection, attraction, environmental adaptation and nematicidal action [21]. Some of the molecules comprising the soursop volatilome such as 3-methyl-1-butanol, 2hexenal, benzaldehyde, mircene, limonene, 2-nonanone, have a toxic effect against nematodes [22,23,24,25,26].…”

Section: Discussionmentioning

confidence: 99%

4-Ethylbenzaldehyde from the volatilome of Annona muricata against Meloidogyne incognita

Campos

Paula

Terra

et al. 2022

Preprint

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In the present study, we demonstrated the potent nematicidal activity of volatile organic compounds (VOCs) released by the Annona muricata leaf macerate. In addition, the toxicity of the compound 4-ethylbenzaldehyde was reported in the various phases of the Meloidogyne incognita life cycle. By biofumigation, even the lowest concentration of soursop leaf macerate tested (1.0%) caused a reduction in nematode hatching, infectivity and reproduction. Analysis of the soursop volatilome performed by gas chromatography coupled with mass spectrometry revealed 41 compounds, of which three, were selected for studies against the nematode. Only 4-ethylbenzaldehyde showed nematicidal activity in vitro, against M. incognita J2 and hatching. As a soil fumigant, 4-ethylbenzaldehyde at dose of 1 mL per litre of substrate had an effect similar (P < 0.05) to that of the commercial fumigant Dazomet (250 µg mL−1). In addition, this molecule, when applied directly to M. incognita-infested soil, significantly reduced nematode infectivity and reproduction compared to the negative control. Therefore, 4-ethylbenzaldehyde shows potential for the development of a new commercial nematicide with reduced toxicity to the environment and high efficacy against plant parasitic nematodes. However, field assays are necessary to confirm these results, which were obtained under controlled conditions.

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“…Bode (2009) found that Xenorhabdus nematophila and Xenorhabdus bovienii produce ketones, amides and also more complex compounds like xenocoumarins (antibiotics) that can provide toxic effect to various organisms. Monteiro et al (2014) reported that castor bean pie has a nematicidal effect on Aphelenchoides besseyi (Christie, 1942), since among the pie compounds, the ketone group is predominant. However, only S. feltiae has an association with the bacterium X. bovienii (Ehlers et al, 1997), the other EPNs studied have symbiosis with other species of bacteria of the same genus.…”

Section: Discussionmentioning

confidence: 99%

Hatching and Mortality of Meloidogyne enterolobii Under the Interference of Entomopathogenic Nematodes In vitro

Damascena

Ferreira

Costa

et al. 2019

Journal of Nematology

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Plant parasitic nematodes have become one of the main problems in the tomato cultivation. Among these, Meloidogyne enterolobii presents great challenges to the farmer, since it is a polyphagous species and difficult to control. The entomopathogenic nematodes (EPNs) present as potential for biological control of this pathogen. The objective of the study was to evaluate the interference of EPNs S. brazilense, S. feltiae, S. rarum, H. amazonensis and H. bacteriophora on hatching and mortality of M. enterolobii. 500 eggs of this nematode and 1.000 infective juveniles of each EPN species were placed in a plastic pot totaling 25 mL of suspension and kept in an incubator at 25°C. The number of juveniles hatched in the suspension was counted every 2 days, until 10 days. After 10 days of evaluations, the remaining suspension (15 mL) containing M. enterolobii and EPNs was inoculated into Rutgers tomato seedlings. The suspension contained approximately in 300 eggs of M. enterolobii occasional juveniles and 600 IJ of each nematode species. Sixty days after inoculation were evaluated gall indexes, egg mass indexes, total number of eggs and juveniles of M. enterolobii and reproductive factor was calculated. In the mortality experiment, 500 infective juveniles of M. enterolobii and 1.000 juveniles of each EPN species were placed in a plastic pot totaling 25 mL of suspension. The evaluation of juvenile mortality was performed by counting of the mobile and immotile nematodes, by adding two drops of NaOH to the nematode suspension. It was verified that on the 10th day all ENPs provided reduction in the hatching of M. enterolobii. In the pot experiment it was found thato gall index, egg mass indexm, nematodes total number and reproduction factor were significantly reduced in treatments with all species of EPNs tested. However, in the mortality test, only EPNs S. brazilense and S. rarum provided mortality on the second day and H. bacteriophora affected mortality on the 4th day. In the other evaluations, there was no statistical difference. The results highlight the potential of the use of EPNs in programs of integrated management of M. enterolobii in tomato.

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Redução de inóculo de Aphelenchoides besseyi em sementes de Brachiaria brizantha tratadas com óleos essenciais

Cited by 10 publications

References 9 publications

Can industrial cleaning procedures make Urochloa ruziziensis seeds nematode free?

Can industrial cleaning procedures make Urochloa ruziziensis seeds nematode free?

4-Ethylbenzaldehyde from the volatilome of Annona muricata against Meloidogyne incognita

Hatching and Mortality of Meloidogyne enterolobii Under the Interference of Entomopathogenic Nematodes In vitro

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