Fusarium head blight : a re-emerging disease

Paulitz, T. C.

doi:10.7202/706188ar

Cited by 29 publications

(18 citation statements)

References 20 publications

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“…Sob condições de umidade contínua e prolongada, observa-se uma massa rosada de esporos. Grãos infetados apresentam-se deformados e chochos (Figura 1), podendo conter micotoxinas produzidas pelo fungo (Sutton, 1982;Parry et al, 1995;Wang, 1997;Paulitz, 1999).…”

Section: Parte I -Aspectos Epidemiológicosunclassified

Giberela do trigo: aspectos epidemiológicos e modelos de previsão

Ponte

Mauricio²,

Fernandes

et al. 2004

Fitopatol. bras.

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do trigo -aspectos epidemiológicos e modelos de previsão. Fitopatologia Brasileira 29: 587-605. 2004. RESUMOA giberela ou fusariose da espiga é, atualmente, uma das mais importantes doenças da cultura do trigo (Triticum aestivum). Epidemias severas têm sido observadas nos últimos anos em diversas regiões do mundo, promovendo perdas na produtividade e na qualidade dos grãos. No Brasil, a giberela alcançou o status de principal doença nas regiões tritícolas, principalmente no Sul do Brasil. A sua natureza esporádica está associada à dependência climática, sendo as mais severas epidemias observadas em anos com maior freqüência de chuvas, durante a fase de florescimento e enchimento de grãos. Poucas são as cultivares com resistência genética aceitável e essas normalmente falham em anos muito favoráveis a epidemias. Medidas de controle com fungicidas têm sido preconizadas, entretanto, a dificuldade reside no momento e na tecnologia de aplicação, para se obter resultados satisfatórios. O melhor entendimento dos fatores que influenciam a dinâmica da doença pode auxiliar no manejo da cultura visando a minimizar os riscos de epidemias. Aspectos como aerobiologia e tipo de inóculo, distribuição espacial e gradiente espacial da doença podem contribuir no conhecimento da associação e a importância de fontes de inóculo local ou distante ao campo. Recentemente, uma grande atenção tem sido dada ao desenvolvimento de modelos de previsão ou de risco de giberela. Tais modelos podem auxiliar na tomada de decisão no acionamento de medidas de controle bem como alertar níveis epidêmicos da doença em uma determinada região, ou mesmo quanto à alta contaminação do trigo com micotoxinas de Fusarium spp.Palavras-chave adicionais: Fusarium graminearum, simulação de epidemias, modelos de risco, distribuição espacial, aerobiologia, Gibberella zeae. ABSTRACT Fusarium head blight of wheat -Epidemiological aspects and forecast modelsFusarium Head Blight (FHB) is one of the most important wheat (Triticum aestivum) diseases worldwide. Severe epidemics have been recently reported in various countries, causing great losses in yield and grain quality. In Brazil, FHB emerged in the last decade as a disease of great concern, mainly in the Southern region. The sporadic nature of the epidcmics is related to strong weather dependence. Epidemic levels are observed in years with a high frequency of rain occurring from flowering to grain filling developmental stages. Most wheat varieties are susceptible and few show acceptable genetic resistance. Fungicides applied at flowering, sometimes, can help in preventing economic losses but their efficacy is dependent on application timing and technology for a good spike covering. A better understanding of the many factors influencing disease occurrence and development is needed for better disease management to minimize risks. Studies on the aerobiology, importance of spore types and spatial and temporal patterns of the disease may contribute to develop hypotheses regarding the association and importance of local ve...

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Section: Parte I -Aspectos Epidemiológicosunclassified

Giberela do trigo: aspectos epidemiológicos e modelos de previsão

Ponte

Mauricio²,

Fernandes

et al. 2004

Fitopatol. bras.

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“…Many countries have adopted maximum allowable limits for the mycotoxin DON in grain. DON is a potent inhibitor of protein synthesis, and thereby presents hazards for both human and animal health (Desjardins et al 1993;Paulitz 1999). In the last three decades, wheat breeding has focused in part on the identification and characterization of genetic sources of resistance to FHB; however only a small number of FHB-resistant genotypes have been identified and the molecular mechanisms for their resistance are still unknown.…”

Section: Introductionmentioning

confidence: 99%

Effect of salicylic acid on Fusarium graminearum, the major causal agent of fusarium head blight in wheat

et al. 2012

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“…Fusarium head blight (FHB) is one of the most important diseases of wheat and other cereals in many cereal-growing areas of the world because of quantitative and qualitative yield losses (Parry et al, 1995;Paulitz, 1999). Fusarium species produce mycotoxins in the grain that can harm animals and humans when contaminated grain products are consumed.…”

Section: Introductionmentioning

confidence: 99%

Interactions Between Barley yellow dwarf virus and Fusarium spp. Affecting Development of Fusarium Head Blight of Wheat

Liu

Buchenauer

2005

Eur J Plant Pathol

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Interactions between Barley yellow dwarf virus (BYDV) and Fusarium species causing Fusarium head blight (FHB) in winter wheat cvs Agent (susceptible to FHB) and Petrus (moderately resistant to FHB) were studied over three years (2001)(2002)(2003) in outdoor pot experiments. FHB developed more rapidly in cv. Agent than in cv. Petrus. The spread of FHB was greater in BYDV-infected plants than in BYDV-free plants. Thousand grain weight (TGW) was reduced more in Fusarium-infected heads of cv. Agent than in cv. Petrus. A highly significant negative correlation was found between disease index and TGW in cv. Agent (r = )0.916), while in cv. Petrus the correlation was less significant (r = )0.765). Virus infection reduced TGW in cv. Petrus more than in cv. Agent. In plants with both infections, TGW reductions in cv. Petrus corresponded to those of BYDV infection, and in cv. Agent TGW was more diminished than in BYDV infection. Effects of different treatments determined over three years on ergosterol contents in grain were generally similar to effects on disease indices. Grain weight per ear and ear weight of the different treatments of both cultivars largely corresponded with the TGW results. Deoxynivalenol (DON) content in grain of cv. Agent infected with Fusarium spp. was 11-25 times higher compared to the corresponding treatments in cv. Petrus. The DON content in grain of plants of the two cultivars infected with both pathogens was higher than that of plants infected only with Fusarium over the three years.

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Fusarium head blight : a re-emerging disease

Cited by 29 publications

References 20 publications

Giberela do trigo: aspectos epidemiológicos e modelos de previsão

Giberela do trigo: aspectos epidemiológicos e modelos de previsão

Effect of salicylic acid on Fusarium graminearum, the major causal agent of fusarium head blight in wheat

Interactions Between Barley yellow dwarf virus and Fusarium spp. Affecting Development of Fusarium Head Blight of Wheat

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