Fungicide failure to control Pythium blight on turf grass in Italy

Titone, P.; Mocioni, M.; Garibaldi, A.; Gullino, M. L.

doi:10.1007/bf03356286

Cited by 9 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, determining P. aristosporum biological characteristics have contributed to understanding the reason behind its prevalence and has provided a theoretical basis for formulating rice seedling blight control measures. In this study, the biological characteristics of P. aristosporum showed that the optimum fermentation conditions were as follows: temperature, 25-30 °C, which is consistent with the farmland temperature in June and July; initial pH, 6.0-7.0, which is consistent with the pH value of the soil for planting rice; and photoperiod, 24 h. Moreover, P. aristosporum is easy to release zoospores, propagates and disperses at high temperature and humidity (Feng and Dernoeden 1999;Titone et al 2009). Based on this, summer is the fastest growing period of P. aristosporum in Heilongjiang Province, we should prevent and control in advance to reduce the occurrence of the disease.…”

Section: Sensitivity Testsupporting

confidence: 52%

“…The EC50 of common chemical agents to Pythium aristosporum in viro DiscussionRice seedling blight has been responsible for severe decreases in rice yield and quality in many countries(Baek et al 2019;Imolehin 1983). There are various complex pathogens that cause rice seedling blight, with previous studies identifying Fusarium verticillioides and Xanthomonas oryzae pv.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Liu

Han

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: Rice seedling blight caused by diverse pathogenic microorganism occurs worldwide, and it is currently the most important seedling disease affecting rice production in Northeast China. Understanding the biological characteristics, host range, and fungicide sensitivity of pathogens causing rice seedling blight has important theoretical and practical significance for further exploring occurrence of the disease and for making targeted prevention and control measures.Results: 10 isolates of Pythium spp. were obtained from rice seedling blight, according to Koch’s postulates, in Heilongjiang Province, China. Based on morphology, molecular biology, and phylogenetic tree analyses, the obtained fungal isolates were identified as P. aristosporum. The biological characteristics of P. aristosporum showed that the optimum fermentation conditions were as follows: temperature, 25°C; initial pH, 6; photoperiod, 24 h light; and carbon and nitrogen sources, starch and glycine, respectively. P. aristosporum causing rice seedling blight had a wide range of hosts and could infect tomato (Solanum lycopersicum), carrot (Daucus carota L.), sweetpotato (Ipomoea batatas), cucumber (Cucumis sativus L.), and zucchini (Cucurbita pepo L.), as well as seedlings of broad bean (Vicia faba L.), red bean (Vigna angularis), snailflower (Lablab purpureus (Linn.)Sweet), soybean (Glycine max), mung bean (Vigna radiata), kidney bean (Phaseolus vulgaris), and hyacinth bean (Dolichos lablab L.); however, it could not infect cabbage (Brassica oleracea L.) and maize (Zea mays L.) seedlings. We also evaluated P. aristosporum sensitivity to five commonly used fungicides and found that fludioxonil (EC50 = 0.0731 μg/ml) was the most effective against P. aristosporum.Conclusion: To our knowledge, this is the first report of P. aristosporum causing rice seedling blight in China. Fludioxonil is a relatively sensitive chemical fungicide against P. aristosporum. P. aristosporum causing rice seedling blight has a good environmental adaptability and a wide range of hosts, which poses a great threat to rice seedling production. Occurrence of the new disease caused by P. aristosporum should give full consideration for the use of proper disease management to protect rice.

show abstract

Section: Sensitivity Testsupporting

confidence: 52%

mentioning

confidence: 99%

Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Liu

Han

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Similarly, a wide geographic distribution, host range, and severe yield loss have been reported for P. aristosporum [56]. For example, the pathogen causes root diseases of wheat, oats, barley, and rye in Canada [57], snow rot of winter wheat (T. aestivum L.) in Washington [58], root rot of snap beans (Phaseolus vulgaris L.) in Wisconsin [59], root rot of konnyaku (Amorphophallus konjac C. Koch) in Ibaraki [60], root dysfunction of creeping bentgrass in Maryland [28], blight on turf grass in Italy [61], and stalk rot in maize (Z. mays) in China [62]. The wide host range of P. aristosporum can be potentially related to the crop production in northeast China, as the results from this study suggest that rotating rice with soybean, black soybean, or cucumber helps avoid large-scale outbreaks of diseases caused by P. aristosporum in rice seedling fields.…”

Section: Discussionmentioning

confidence: 99%

Characterisation of Pythium aristosporum Oomycete—A Novel Pathogen Causing Rice Seedling Blight in China

Liu

Zhang

et al. 2022

JoF

View full text Add to dashboard Cite

Rice seedling blight is a globally occurring seedling disease caused by multiple pathogens. It is currently the most common disease affecting rice production in northeast China; hence, determining the causal agents, including its biological characteristics, host range, and fungicide efficacy is vital for its effective management. The present study obtained 45 pathogenic isolates from diseased rice seedlings in Suihua, Heilongjiang Province, China. Of these, five pathogens were identified based on their morphology and molecular identification, while 10 oomycete isolates were identified as Pythium aristosporum—the first to be reported in rice seedling blight. Its optimum growth conditions include a temperature of 25 °C, pH 6, and photoperiod of 24 h. Except for soybean (Glycine max (L.) Merr.), black soybean (Glycine max var.), and cucumber (Cucumis sativus L.), P. aristosporum can potentially infect and cause seedling blight on other hosts, such as wheat (Triticum aestivum L.), maize (Zea mays L.), sorghum (Sorghum bicolor (L.) Moench), alfalfa (Medicago sativa L.), oats (Avena sativa L.), and white clover (Trifolium repens L.). Its isolates were found to be highly sensitive to metalaxyl + propamocarb (EC50 = 0.0138 μg/mL) with 84.1% efficacy at 313 μg/mL. These results can serve as the basis for controlling P. aristosporum.

show abstract

“…originating from turfgrass, potato, soybean, corn and floral crops . On the other hand, there are also reports on mefenoxam resistant isolates of P. irregulare complex, P. ultimum and P. aphanidermatum with somewhat lower EC 50 values . These differences in absolute values might be primarily related to different test methods and illustrates the importance of including resistant (and sensitive) reference isolates per species and using approved standard test procedures as deposited for example in the FRAC monitoring methods collection (http://www.frac.info) to exclude any misleading results.…”

Section: Discussionmentioning

confidence: 99%

Differentiation of Pythium spp. from vegetable crops with molecular markers and sensitivity to azoxystrobin and mefenoxam

Matić

Gilardi

Gisi

et al. 2018

Pest Management Science

View full text Add to dashboard Cite

The results document the necessity of well-defined chemical control strategies adapted to different Pythium species. Since the intrinsic activity of azoxystrobin among species was stable and no resistant isolates were found, it may be applied without species differentiation, provided it is used preventatively to also control highly aggressive isolates. For a reliable use of mefenoxam, precise identification and sensitivity tests of Pythium species are crucial because its intrinsic activity is variable and resistant isolates may exist. Appropriate mixtures and/or alternation of products may help to further delay resistance development. © 2018 Society of Chemical Industry.

show abstract

Fungicide failure to control Pythium blight on turf grass in Italy

Cited by 9 publications

References 11 publications

Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Characterisation of Pythium aristosporum Oomycete—A Novel Pathogen Causing Rice Seedling Blight in China

Differentiation of Pythium spp. from vegetable crops with molecular markers and sensitivity to azoxystrobin and mefenoxam

Contact Info

Product

Resources

About