Abstract
To control apple scab caused by Venturia inaequalis, fungicides inhibiting the growth of fungal pathogens during the initial stages of infection are important management tools. From 2019 to 2021, bioassays to evaluate the curative effects of fungicides typically used to control apple scab revealed that iminoctadine triacetate, inpyrfluxam, pydiflumetofen, ipflufenoquin, fluopyram, fluxapyroxad, and cyprodinil exerted curative effects against V. inaequalis. Overall, iminoctadine triacetate, inpyrfluxam, and pydiflumetofen were particularly effective. Control of primary infection is important for the management of scab. Therefore, these curative fungicides should be applied during the period from half-inch green to fruit set.
References
Araya J, Fujita K (1996) Chronological changes of apple scab lesions caused by postinfection applications of ergosterol biosynthesis-inhibiting fungicides (in Japanese with English summary). Bull Aomori Apple Exp Stn 29:1–16
Chen Y, Yao J, Yang X, Zhang AF, Gao TC (2014) Sensitivity of Rhizoctonia solani causing rice sheath blight to fluxapyroxad in China. Eur J Plant Pathol 140:419–428. https://doi.org/10.1007/s10658-014-0477-7
Dahmen H, Staub T (1992) Protective, curative, and eradicant activity of difenoconazole against Venturia inaequalis, Cercospora arachidicola, and Alternaria solani. Plant Dis 76:774–777. https://doi.org/10.1094/PD-76-0774
Duan Y, Xiu Q, Li H, Li T, Wang J, Zhou M (2019) Pharmacological characteristics and control efficacy of a novel SDHI fungicide pydiflumetofen against Sclerotinia sclerotiorum. Plant Dis 103:77–82. https://doi.org/10.1094/PDIS-05-18-0763-RE
Fiaccadori R (2018) In vitro, in vivo and in field sensitivity of Venturia inaequalis to anilinopyrimidine fungicides with different types of scab management and degree of control. Open Access Libr J 5:1–13
He LM, Cui KD, Ma DC, Shen RP, Huang XP, Jiang JG, Mu W, Liu F (2017) Activity, translocation, and persistence of isopyrazam for controlling cucumber powdery mildew. Plant Dis 101:1139–1144. https://doi.org/10.1094/PDIS-07-16-0981-RE
Hirayama K, Hanaoka T, Araya J, Tushima Y, Akahira T (2017) DMIs-resistant strains of Venturia inaequalis causing apple scab in Aomori Prefecture, Japan (in Japanese). Ann Rept Plant Prot North Jpn 68:108–114
Hou YP, Chen YL, Qu XP, Wang JX, Zhou MG (2018) Effects of a novel SDHI fungicide pyraziflumid on the biology of the plant pathogenic fungi Bipolaris maydis. Pestic Biochem Physiol 149:20–25. https://doi.org/10.1016/j.pestbp.2018.05.004
Kanda Y (2013) Investigation of the freely available easy-to-use software ‘EZR’ for medical statistics. Bone Marrow Transplant 48:452–458. https://doi.org/10.1038/bmt.2012.244
Knauf-Beiter G, Dahmen H, Heye U, Staub T (1995) Activity of cyprodinil: Optimal treatment timing and site of action. Plant Dis 79:1098–1103. https://doi.org/10.1094/PD-79-1098
MacHardy WE (1996) Apple scab: biology, epidemiology, and management. APS Press, St. Paul
Nishino S, Kuwahara R, Fujii T, Nishino C, Sano H (2021) Studies on a novel fungicide, Kinoprol®□ (MIGIWA®□) (1). Control efficacies Kinoprol®□ on apple scab (Abstract in Japanese). Jpn J Phytopathol 87:197
Oliveira MS, Cordova LG, Peres NA (2020) Efficacy and baseline sensitivity of succinate-dehydrogenase-inhibitor fungicides for management of Colletotrichum crown rot of strawberry. Plant Dis 104:2860–2865. https://doi.org/10.1094/PDIS-01-20-0083-RE
Schwabe WFS (1980) Curative activity of fungicides against apple leaf infection by Venturia inaequalis. Phytophylactica 12:199–207
Toffolatti SL, Venturini G, Bianco PA (2016) First report of SDHI resistant strains of Venturia inaequalis from commercial orchards in northern Italy. Plant Dis 100:2324. https://doi.org/10.1094/PDIS-03-16-0361-PDN
Tsukuda S (2014) Developing trend of SDHI fungicide and studies on a novel fungicide, isofetamid (in Japanese). Jpn J Pestic Sci 39:89–95. https://doi.org/10.1584/jpestics.W13-35
Veloukas T, Karaoglanidis GS (2012) Biological activity of the succinate dehydrogenase inhibitor fluopyram against Botrytis cinerea and fungal baseline sensitivity. Pest Manag Sci 68:858–864. https://doi.org/10.1002/ps.3241
Villani SM, Ayer K, Cox KD (2016) Molecular characterization of the sdhB gene and baseline sensitivity to penthiopyrad, fluopyram, and benzovindiflupyr in Venturia inaequalis. Plant Dis 100:1709–1716. https://doi.org/10.1094/PDIS-12-15-1512-RE
Yaegashi H, Hirayama K, Akahira T, Ito T (2020) Point mutation in CYP51A1 of Venturia inaequalis is associated with low sensitivity to sterol demethylation inhibitors. J Gen Plant Pathol 86:245–249. https://doi.org/10.1007/s10327-020-00924-4
Yukita K (2019) Curative effect of SDHI fungicides on apple scab (in Japanese). Ann Rept Plant Prot North Jpn 70:84–89
Acknowledgements
I thank Dr. Y. Ishiguri, Apple Research Institute, AITC, for helping me improve the manuscript. I also thank Editage (www.editage.com) for English language editing.
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Hirayama, K. Curative effects of fungicides against Venturia inaequalis causing apple scab. J Gen Plant Pathol 88, 264–269 (2022). https://doi.org/10.1007/s10327-022-01071-8
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DOI: https://doi.org/10.1007/s10327-022-01071-8