Sensitivity of Colletotrichum acutatum to six fungicides and reduction in incidence and severity of chili anthracnose using pyraclostrobin

Gao, Yangyang; He, Lifei; Li, Bei-Xing; Mu, Wei; Lin, Jin; Liu, Feng

doi:10.1007/s13313-017-0518-8

Cited by 33 publications

(14 citation statements)

References 24 publications

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“…Both germination rate and hyphal growth of Alternaria alternata and Penicillium digitatum were inhibited by boscalid treatment (Vega and Dewdney, 2015;Xu et al, 2020). Also, it was reported that the germination rate of Puccinia striiformis causing stripe rust in wheat (Kang et al, 2019) or Colletotrichum acutatum causing anthracnose in chili (Gao et al, 2017), was decreased by pyraclostrobin. Conidia and hyphae of Monilinia fructicola and Botrytis cinerea treated with mixtures of pyraclostrobin and boscalid did not germinate or develop well compared with untreated conidia and hyphae (Amiri et al, 2010;Kim and Xiao, 2010).…”

Section: Discussionmentioning

confidence: 97%

Suppression of Ripe Rot on ‘Zesy002’ Kiwifruit with Commercial Agrochemicals

Shin

Ledesma

Whitman³

et al. 2021

Plant Pathol J

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Ripe rot caused by Botryosphaeria dothidea is one of the serious diseases of postharvest kiwifruit. In order to control ripe rot on Actinidia chinensis cultivar ‘Zesy002’, several commercial agrofungicides were selected by an antifungal test on an artificial medium. Furthermore, disease suppression by the selected fungicides was evaluated on the kiwifruit by inoculation with a conidial suspension of B. dothidea. On the artificial media containing boscalid + fludioxonil was shown to be the most effective antifungal activity. However, in the bio-test pyraclostrobin + boscalid and iminoctadine-tris were the most effective agrochemicals on the fruit. On the other hand, the infection structures of B. dothidea on kiwifruit treated with pyraclostrobin + boscalid were observed with a fluorescent microscope. Most of the fungal conidia had not germinated on the kiwifruit treated with the agrochemicals whereas on the untreated fruit the fungal conidia had mostly germinated. Electron microscopy of the fine structures showed morphological changes to the conidia and branch of hyphae on the kiwifruit pre-treated with pyraclostrobin + boscalid, indicating its suppression effect on fungal growth. Based on this observation, it is suggested that ripe rot by B. dothidea may be suppressed through the inhibition of conidial germination on the kiwifruit treated with the agrochemicals.

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Section: Discussionmentioning

confidence: 97%

Suppression of Ripe Rot on ‘Zesy002’ Kiwifruit with Commercial Agrochemicals

Shin

Ledesma

Whitman³

et al. 2021

Plant Pathol J

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“…The EC50 values of carbendazim and mancozeb for C. acutatum isolates estimated, respectively, by the inhibition of mycelial growth and conidial germination, were 0.1946 µg mL -1 for carbendazim and between 0.24 and 0.85 µg mL -1 for mancozeb (Cai et al 2008;Gao et al 2017). For C. falcatum, our study demonstrated EC50 values of 0.2668 µg mL -1 for carbendazim and 0.3829 µg mL -1 for mancozeb, calculated based on the estimated resazurin reduction percentage, similar to the values reported for C. acutatum.…”

Section: Discussionmentioning

confidence: 99%

A Rapid Microtiter Assay to Evaluate Fungicide Sensitivity to Colletotrichum falcatum Isolates

Menezes¹

2022

IJAB

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Chemical control of sugarcane red rot, caused by Colletotrichum falcatum, forms part of integrated management of the disease. A rapid microtiter bioassay based on the colorimetric changes of resazurin dye was developed to evaluate the sensitivity of C. falcatum to the main chemical fungicide groups, including strobilurin, triazole, benzimidazole, isophthalonitrile and dithiocarbamate. There was no significant difference among the isolates in terms of growth inhibition for any of the active ingredients tested (α = 0.01). The C. falcatum isolates showed almost similar sensitivity to various fungicides. The active ingredients varied in relation to fungitoxicity. Doses that inhibited 50% of C. falcatum growth were calculated as a percentage of resazurin reduction due to various fungicides. The colorimetric method used to assess the fungitoxicity of active ingredients to C. falcatum, combined with resazurin, proved a fast practical and efficient method. © 2022 Friends Science Publishers

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“…Pyraclostrobin controlled anthracnose on strawberry, bean, grape, and pepper plants (Conner et al, 2004;Gao et al, 2017;Samuelian et al, 2014;Turechek et al, 2006). However, recent occurrences of pyraclostrobin-resistant C. acutatum isolates in pepper and strawberry fields warned of frequently using pyraclostrobin (Forcelini et al, 2016;Kim et al, 2019).…”

mentioning

confidence: 99%

Chemical Fungicides and Bacillus siamensis H30-3 against Fungal and Oomycete Pathogens Causing Soil-Borne Strawberry Diseases

et al. 2021

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Chemical and biological agents were evaluated to inhibit Colletotrichum fructicola, Phytophthora cactorum, and Lasiodiplodia theobromae causing strawberry diseases. Mycelial growths of C. fructicola were gradually arrested by increasing concentrations of fungicides pyraclostrobin and iminoctadine tris (albesilate). P. cactorum and L. theobromae were more sensitive to pyraclostrobin compared to C. fructicola, but iminoctadine tris (albesilate) was not or less effective to limit P. cactorum or L. theobromae, respectively. Bacillus siamensis H30-3 was antagonistic against the three pathogens by diffusible as well as volatile molecules, and evidently reduced aerial mycelial formation of P. cactorum. B. siamensis H30-3 growth was declined by at least 0.025 mg/ml of pyraclostrobin. The two fungicides additively inhibited mycelial growths of C. fructicola, but not of P. cactorum and L. theobromae. B. siamensis H30-3 volatiles led to less growth of C. fructicola than one reduced by the fungicides. Taken together, in vitro antimicrobial activities of the two fungicides together with or without B. siamensis H30-3 volatiles may be cautiously incorporated into integrated management of strawberry diseases dependent on causal pathogens.

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Sensitivity of Colletotrichum acutatum to six fungicides and reduction in incidence and severity of chili anthracnose using pyraclostrobin

Cited by 33 publications

References 24 publications

Suppression of Ripe Rot on ‘Zesy002’ Kiwifruit with Commercial Agrochemicals

Suppression of Ripe Rot on ‘Zesy002’ Kiwifruit with Commercial Agrochemicals

A Rapid Microtiter Assay to Evaluate Fungicide Sensitivity to Colletotrichum falcatum Isolates

Chemical Fungicides and Bacillus siamensis H30-3 against Fungal and Oomycete Pathogens Causing Soil-Borne Strawberry Diseases

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