scholarly journals Synthesis and Fungicidal Activity of Pyrazolecarboxamide Containingα-Aminoacetanilide Moiety

2012 ◽  
Vol 9 (1) ◽  
pp. 211-218 ◽  
Author(s):  
Zhi-Yong Fang ◽  
Hong Jiang ◽  
Xiao-Dong Ye
Keyword(s):  
Rhizoctonia Solani ◽  
Sclerotinia Sclerotiorum ◽  
Fungicidal Activity ◽  
Monilinia Fructicola ◽  
Alternaria Brassicae ◽  
H Nmr ◽  
Inhibitory Activities

A series of pyrazolecarboxamides containingα-aminoacetanilide moiety (4) were synthesized. These compounds were characterized by IR, MS and1H NMR. Their fugicidal activities againstRhizoctonia solani, Sclerotinia sclerotiorum, Monilinia fructicolaandAlternaria brassicaewere evaluated. The results show that compound 4l and 4p, which bear only one electron-donating group on thepara-position of phenyl or benzyl group, possessed excellent inhibitory activities against the above four fungi.

scholarly journals Synthesis and fungicidal activities of 2-{[(2-(1H-1,2,4-triazol-1-yl)-ethylidene)amino]oxy}alkanamides containing dihydrobenzofuran

2018 ◽  
Vol 24 (6) ◽  
pp. 339-344 ◽  
Author(s):  
Li Wan ◽  
Yang Zihui ◽  
Hu Aixi ◽  
Ye Jiao ◽  
Ou Xiaoming ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Fungicidal Activity ◽  
Blumeria Graminis ◽  
Inhibition Rate ◽  
New Compounds ◽  
Further Development

Abstract In order to find new compounds with high fungicidal activity, acetamide derivatives 4a–x were rationally designed, synthesized, characterized and tested against various fungi in vivo. The bioassay results indicate that compounds 4k,m,o,r exhibit an 80% inhibition rate against Rhizoctonia solani at 500 mg/L, and compound 4j shows an 80% inhibition rate against Blumeria graminis at 500 mg/L. Therefore, compounds of 4 are promising fungicidal candidates worthy of further development.

scholarly journals Desinfestação de substratos para produção de mudas, utilizando vapor de água

2001 ◽  
Vol 19 (2) ◽  
pp. 155-158
Author(s):  
João Bosco C. Silva ◽  
Ivani T. Oliveira-Napoleão ◽  
Loeni L. Falcão
Keyword(s):  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Sclerotinia Sclerotiorum ◽  
Ralstonia Solanacearum

O tratamento sanitário de substratos é uma operação importante no processo de produção de mudas e no cultivo de plantas em vasos ou outros contentores. Tradicionalmente tem-se utilizado o gás brometo de metila como agente desinfetante. Entretanto, a produção deste gás deverá ser abolida até o ano 2010, forçando-se a busca de novas opções. Desenvolveu-se na Embrapa Hortaliças um equipamento que utiliza o vapor de água à baixa pressão, produzido por uma caldeira industrial, com capacidade para evaporar 30 L/h de água, para aquecer o substrato contido em uma caixa metálica cilíndrica com capacidade de 2000 L. O vapor é aplicado no fundo da caixa que contém uma camada de brita coberta com uma tela metálica de malha de 2 mm, que favorece a distribuição uniforme do vapor por toda a massa de substrato. O tempo de aquecimento é de aproximadamente 3 horas e o calor armazenado durante este período mantém a massa de substrato aquecida a temperaturas pasteurizantes, por até 4 horas após a aplicação do vapor. Para testar a eficácia do sistema avaliou-se a sobrevivência dos patógenos Ralstonia solanacearum, Fusarium oxysporum, Sclerotinia sclerotiorum e Rhizoctonia solani. Aplicou-se vapor por uma hora, não considerando o período de aquecimento, e coletaram-se as amostras após uma, duas, três ou quatro horas o início da aplicação de vapor. O tratamento por uma hora, em adição ao período de aquecimento, resultou na eliminação dos patógenos.

scholarly journals Influence of nitrogen fertilizing on occurrence of fungi infecting parsley seedling roots (Petroselinum sativum Hoffm.)

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 336-339
Author(s):  
J. Nawrocki ◽  
S. Mazur ◽  
J. Kućmierz
Keyword(s):  
Health Status ◽  
Rhizoctonia Solani ◽  
Sclerotinia Sclerotiorum ◽  
Significant Role ◽  
Nitrogen Fertilizer ◽  
Lower Root ◽  
Seedling Roots ◽  
Bacteria And Fungi ◽  
And Control ◽  
Different Levels

The three years experiments based on parsley roots of cultivars: Omega, Berlińska and Vistula. Nitrogen fertilizer was used in different levels (0, 100, 200, 300 and 400 kg/ha). Results of autumn analysis indicate that differentiated nitrogen fertilizing has no significant effect on health status of parsley roots. Spring examinations showed increase percentage of ill roots. Lower root infestation of each cultivar was in the combinations: 100 kg/ha and control without nitrogen fertilizations. Omega showed the best soundness. Experiments indicated that cultivar plays a more significant role than nitrogen fertilizing level. From ill parsley roots, the most often were isolated fungi: Alternaria radicina, Fusarium ave-naceum and F. oxysporum during spring; bacteria and fungi species: Sclerotinia sclerotiorum, Rhizoctonia solani and Alternaria radicina.

scholarly journals Utilisation d'une souche indigène de Trichoderma harzianum contre cinq agents pathogènes chez le concombre et la tomate de serre au Québec

2005 ◽  
Vol 83 (2) ◽  
pp. 73-87 ◽  
Author(s):  
J. Caron ◽  
L. Laverdière ◽  
P.O. Thibodeau ◽  
R.R. Bélanger
Keyword(s):  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Sclerotinia Sclerotiorum ◽  
Verticillium Dahliae ◽  
Trichoderma Harzianum ◽  
Pythium Ultimum

Le potentiel antagoniste du biofongicide à base de Trichoderma harzianum MAUL-20, isolé au Québec, a été testé contre cinq agents telluriques phytopathogènes(Fusarium oxysporum f. sp. radicis-lycopersici (FORL), Pythium ultimum, Rhizoctonia solani, Sclerotinia sclerotiorum et Verticillium dahliae) du concombre et de la tomate de serre. Le biofongicide a démontré une efficacité contre P. ultimum et R. solani chez le concombre et la tomate et contre FORL chez la tomate. De plus, T. harzianum MAUL-20 a eu un effet stimulant sur le développement des plants de concombre lorsque cultivés, sans agents pathogènes, dans un substrat organique alimenté du biofongicide. L'efficacité de T. harzianum MAUL-20 a été comparée à celle du biofongicide américain Rootshield™ (Trichoderma harzianum KRL-AG2) et le premier a démontré une activité antagoniste égale ou supérieure à celle de Rootshield™.

scholarly journals Benzyl and Phenyl Glucosinolates Are Metabolized by the Specific Plant Pathogen Alternaria Brassicicola but Not by the Generalist Fungal Pathogens Rhizoctonia Solani or Sclerotinia Sclerotiorum

2021 ◽  
Author(s):  
M. Soledade C. Pedras ◽  
Chintamani Thapa ◽  
Sajjad Hossain
Keyword(s):  
Carboxylic Acid ◽  
Rhizoctonia Solani ◽  
Sclerotinia Sclerotiorum ◽  
Plant Pathogen ◽  
Fungal Pathogens ◽  
Spectroscopic Characterization ◽  
Fungal Species ◽  
Alternaria Brassicicola ◽  
Metabolic Products

The metabolism of benzyl and phenyl glucosinolates by three phytopathogenic fungal species is investigated and established that <i>A. brassicicola </i>metabolized intact benzyl and phenyl glucosinolates and the corresponding desulfo derivatives. Syntheses and spectroscopic characterization of benzyl and phenyl desulfo-glucosinolates are reported. Phenylacetonitrile and benzylisothiocyanate are the first metabolic products of benzyl glucosinolate; benzyl isothiocyanate is further metabolized to 3-benzyl-2-thioxo-2,3-dihydrothiazolidine-4-carboxylic acid.

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