Distribution and fungicide sensitivity of <i>Colletotrichum coccodes</i> in French potato‐producing areas

Andrivon, Didier; Ramage, Karine; Guérin, C.; Lucas, Jérémy; Jouan, B.

doi:10.1046/j.1365-3059.1997.d01-60.x

Cited by 33 publications

(35 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…O fungicida imazalil apresentou alta eficiência no controle do C. gloeosporioides. Resultados semelhantes foram encontrados por Andrivon et al (1997) com Colletotrichum coccodes em batata. A CMI encontrada para este fungicida situou-se entre 10-100 ppm, sendo superior à aquelas apresentadas pelos fungicidas prochloraz, propiconazol e tebuconazol.…”

Section: Resultados E Discussão Sensibilidade Micelial De C Gloeospounclassified

Efeito de fungicidas no controle in vitro de Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya l.)

Tavares

Souza

2005

Ciênc. agrotec.

View full text Add to dashboard Cite

Effects of fungicides on the in vitro control of Colletotrichum gloeosporioides, the anthracnosis etiologic agent of the Papaya tree (Carica papaya L.). Giltembergue Macedo Tavares 1 , Paulo Estevão de Souza RESUMOCom o objetivo de avaliar a eficiência de alguns fungicidas sobre Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya L.), testes in vitro foram conduzidos no Laboratório de Epidemiologia/UFLA. Para tanto, utilizou-se o método de incorporação do fungicida ao meio de cultura BDA para avaliação da inibição do crescimento micelial e lâmina escavada contendo água com fungicida para germinação de conídios. Os fungicidas testados foram: azoxystrobin, chlorotalonil, hipoclorito de sódio, imazalil, oxicloreto de cobre, prochloraz, propiconazol, tebuconazol, thiabendazol e tiofanato metílico, nas concentrações de 0, 1, 10, 100, 500 e 1.000 ppm para avaliar a inibição do crescimento do micélio e 0, 1, 10, 50 e 100 ppm para testar inibição da germinação de conídios. Os fungicidas azoxystrobin, chlorotalonil, imazalil, prochloraz, propiconazol e tebuconazol apresentaram alta eficiência na inibição do crescimento micelial. Os fungicidas dos grupos dos benzimidazóis (thiabendazol e tiofanato metílico) mostraram baixa eficiência e ineficiência, respectivamente, no controle do patógeno, demonstrando uma tolerância do isolado em estudo a estes produtos. O hipoclorito de sódio também apresentou baixa eficiência no controle do crescimento micelial do fungo. Quanto à inibição da germinação dos conídios, os fungicidas que demonstraram maior eficiência em baixas concentrações foram: chlorotalonil e hipoclorito de sódio. Termos para indexação: Colletotrichum gloeosporioides, Carica papaya, controle químico, mamoeiro. ABSTRACTThe efficiency of fungicides on Colletotrichum gloeosporioides was evaluated in vitro in the Laboratory of Epidemiology and Diseases Management of the Department of Phytopathology /UFLA. The fungicides were applied either in BDA medium or in glass slide chambers, the latter to assess the effects on conidial germination. The fungicides tested were: azoxystrobin, chlorothalonil, sodium hypochloride, imazalil, copper oxychloride, prochloraz, propiconazol, tebuconazol, thiabendazol and thiophanate-methyl in the concentrations of 0, 1, 10, 100, 500 and 1.000 ppm to evaluate the inhibition of the mycelial growth and in the concentrations of 0, 1, 10, 50 and 100 ppm to test inhibition of the conidial germination. The fungicides azoxystrobin, chlorotalonil, imazalil, prochloraz, propiconazol and tebuconazol presented high efficiency in the inhibition of the mycelial growth. The fungicides of the benzimidazol group (thiabendazol and thiophanate-methyl) showed low efficiency in the control of C. gloeosporioides. Sodium hypochloride showed low efficiency in the control of the mycelial growth of the fungus. For inhibition of the conidial germination, the fungicides oxychloride, chlorothalonil and sodium hypochloride showed high efficiency, even at low concentrations. C. gloeosp...

show abstract

Section: Resultados E Discussão Sensibilidade Micelial De C Gloeospounclassified

Efeito de fungicidas no controle in vitro de Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya l.)

Tavares

Souza

2005

Ciênc. agrotec.

View full text Add to dashboard Cite

show abstract

“…These isolates were previously characterized for morphology (C. Guérin, unpublished data), growth rate and fungicide sensitivity (Andrivon et al, 1997). Isolates were subcultured on malt agar from cool-stored cultures before use, and routinely maintained on malt agar throughout the experiments.…”

Section: Fungal Isolatesmentioning

confidence: 99%

Colonization of roots, stolons, tubers and stems of various potato (Solanum tuberosum) cultivars by the black‐dot fungus Colletotrichum coccodes

Andrivon¹,

Lucas²,

Guérin³

et al. 1998

Plant Pathology

Self Cite

View full text Add to dashboard Cite

In an attempt to better understand the importance of tuber-borne inoculum in black dot development, several potato cultivars were inoculated with various Colletotrichum coccodes isolates. Symptoms developed first on underground organs (starting 2 weeks after inoculation on roots, and later on stolons and tubers) of inoculated plants; stem infections developed only after 7-10 weeks, depending on the cultivar. Infection with C. coccodes resulted in a reduction in numbers of stolons and tubers in cv. Bintje, but not in the later maturing cv. Roseval. Significant isolate by cultivar interactions were detected from the analysis of root symptoms after inoculation of three potato cultivars (Bintje, Spunta and Desiree) with five C. coccodes isolates. Such an interaction was also detected for stolon/tuber symptoms at the latest scoring date (98 days after inoculation), but not at earlier dates (58, 70 and 84 days after inoculation). These results suggest that protocols based on root colonization might be used for investigating cultivar response to black dot and pathogenicity of C. coccodes isolates, and that some specificity exists in the reaction of potato genotypes to this pathogenic fungus.

show abstract

“…Black dot severity has not been consistently correlated with potato tuber yields (Barkdoll and Davis 1992;Read and Hide 1995a;Scholte et al 1985;Tsror et al 1999). This may be partially due to differences in cultivar susceptibility to C. coccodes (Read 1991;Andrivon et al 1997Andrivon et al , 1998Tsror et al 1999). Early maturing cultivars are generally more susceptible to black dot than later maturing cultivars (Read 1991;Andrivon et al 1997Andrivon et al , 1998 in which Ranger Russet is a late maturing potato.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Early-season, Single Applications of Azoxystrobin for the Control of Potato Black Dot as Evaluated by Three Assessment Methods

Cummings

Johnson

2008

Am. J. Pot Res

View full text Add to dashboard Cite

Timing of azoxystrobin application for control of potato black dot was evaluated at two to four discrete times during early growth stages of potato from planting to just before row closure in trials from 2003 through 2006. Application timings consisted of a single application of azoxystrobin made either at planting, 34, 43, or 60-62 days after planting. Black dot severity was evaluated on aboveand below-ground stems using three assessment methods. Incidence of infected progeny tubers and yield were also determined. Application at 60-62 days after planting was the most efficacious timing when black dot was evaluated as frequency of detecting Colletotrichum coccodes from 0.5 cm stem sections taken from near the plant crown in 2 of 3 years, as distance of sclerotium expansion on stems in 1 of 2 years, and as sclerotium density on stems 2 of 3 years. Black dot severity was not reduced as evaluated by any of the assessment methods when application of azoxystrobin was made at planting. Below-ground stems had more disease than the above-ground stems as measured by frequency of detection of C. coccodes near the crown 2 of 4 years, distance of sclerotium expansion on stems 2 of 2 years and sclerotium density on stems 3 of 3 years. Disease severity between above-and below-ground stem segments were highly correlated for all disease assessment methods and years except for frequency of detection of C. coccodes from crown tissue in 2005. There were no statistical interactions for any of the disease severity assessment methods between above-and below-ground stem segments with azoxystrobin timing. The sclerotia assessment on above-ground stem segments at end of season was an efficient measure of black dot. Incidence of infected progeny tubers was significantly reduced compared to the non-treated control when application was made at 62 days after planting in 1 of 3 years and at 34 and 43 days after planting in 2 of 4 years. There was not a significant difference in yield between any of the application times and the non-treated control in any year.

show abstract

Distribution and fungicide sensitivity of Colletotrichum coccodes in French potato‐producing areas

Cited by 33 publications

References 14 publications

Efeito de fungicidas no controle in vitro de Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya l.)

Efeito de fungicidas no controle in vitro de Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya l.)

Colonization of roots, stolons, tubers and stems of various potato (Solanum tuberosum) cultivars by the black‐dot fungus Colletotrichum coccodes

Effectiveness of Early-season, Single Applications of Azoxystrobin for the Control of Potato Black Dot as Evaluated by Three Assessment Methods

Contact Info

Product

Resources

About