Araştırma Makalesi

The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation

Cilt: 66 Sayı: 3 30 Eylül 2026
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The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation

Öz

This study evaluated the efficacy of two fungicide mixtures, azoxystrobin + difenoconazole and mandipropamid + zoxamide, in protecting grapevine leaves against Plasmopara viticola. The effects of different fungicide doses on the P. viticola population collected from various grapevine cultivars were investigated by assessing sporulation area on detached leaves, zoospore release, zoospore mobility, and ε-viniferin accumulation. The EC50 value for mandipropamid + zoxamide was 0.031 µg ml-1, yielding 97.73% inhibition of sporulation area at 1 µg ml-1. In contrast, the azoxystrobin + difenoconazole mixture exhibited an EC50 value of 40 µg ml-1 and achieved 92.82% inhibition of sporulation area at 300 µg ml-1. The G143A mutation, a known marker for fungicide resistance, was found using allele-specific polymerase chain reaction (ASPCR). Furthermore, the mandipropamid + zoxamide mixture promoted ε-viniferin accumulation at a low concentration (0.01 µg ml⁻¹) while significantly inhibiting zoospore mobility and release. The azoxystrobin + difenoconazole mixture reduced the number of motile zoospores by 84% at 10 µg ml⁻¹, suggesting its potential to lower infection risk under field conditions. These findings suggest that, in addition to their direct effects on pathogen development, fungicides should also be evaluated for their impact on zoospore mobility, a critical stage in the infection cycle, to enhance sustainable disease management strategies.

Anahtar Kelimeler

Kaynakça

  1. Alonso-Villaverde V., Voinesco F., Viret O., Spring J.L., Gindro K., 2011. The effectiveness of stilbenes in resistant Vitaceae: ultrastructural and biochemical events during Plasmopara viticola infection process. Plant Physiology and Biochemistry, 49 (3), 265–274. https://doi.org/10.1016/j.plaphy.2010.12.010
  2. Aoki Y., Hada Y., Suzuki S., 2013. Development of a multiplex allele-specific primer PCR assay for simultaneous detection of QoI and CAA fungicide resistance alleles in Plasmopara viticola populations. Pest Management Science, 69, 268–273. https://doi.org/10.1002/ps.3384
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  4. Barchenger D.W., Clark J.R., Threlfall R.T., Howard L.R., Brownmiller C.R., 2014. Effect of field fungicide applications on storability, physicochemical, and nutraceutical content of muscadine grape (Vitis rotundifolia Michx.) genotypes. HortScience, 49 (10),1315–1323. https://doi.org/10.21273/HORTSCI.49.10.1315
  5. Blum M., Waldner M., Gisi U., 2010. A single point mutation in the novel PvCesA3 gene confers resistance to the carboxylic acid amide fungicide mandipropamid in Plasmopara viticola. Fungal Genetics and Biology, 47, 499–510. https://doi.org/10.1016/j.fgb.2010.02.009
  6. Boso S., Alonso-Villaverde V., Gago P., Santiago J.L., Martínez M.C., 2014. Susceptibility to downy mildew (Plasmopara viticola) of different Vitis varieties. Crop Protection, 63, 26–35.
  7. Buonassisi D., Colombo M., Migliaro D., Dolzani C., Peressotti E., Mizzotti C., Velasso R., Masiero S., Perazzillo M., Vezzulli S., 2017. Breeding for grapevine downy mildew resistance: a review of ‘omics’ approaches. Euphytica, 213, 103. https://doi.org/10.1007/s10681-017-1900-9
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Ayrıntılar

Birincil Dil

İngilizce

Konular

Fitopatoloji

Bölüm

Araştırma Makalesi

Yayımlanma Tarihi

30 Eylül 2026

Gönderilme Tarihi

11 Mart 2026

Kabul Tarihi

20 Mayıs 2026

Yayımlandığı Sayı

Yıl 2026 Cilt: 66 Sayı: 3

Kaynak Göster

APA
Köycü, N. D., Özer, N., Bayraktar, H., & Uysal Seçkin, G. (2026). The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation. Plant Protection Bulletin, 66(3), 212-223. https://doi.org/10.16955/bitkorb.1907357
AMA
1.Köycü ND, Özer N, Bayraktar H, Uysal Seçkin G. The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation. Plant Protection Bulletin. 2026;66(3):212-223. doi:10.16955/bitkorb.1907357
Chicago
Köycü, Nagehan Desen, Nuray Özer, Harun Bayraktar, ve Gamze Uysal Seçkin. 2026. “The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation”. Plant Protection Bulletin 66 (3): 212-23. https://doi.org/10.16955/bitkorb.1907357.
EndNote
Köycü ND, Özer N, Bayraktar H, Uysal Seçkin G (01 Eylül 2026) The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation. Plant Protection Bulletin 66 3 212–223.
IEEE
[1]N. D. Köycü, N. Özer, H. Bayraktar, ve G. Uysal Seçkin, “The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation”, Plant Protection Bulletin, c. 66, sy 3, ss. 212–223, Eyl. 2026, doi: 10.16955/bitkorb.1907357.
ISNAD
Köycü, Nagehan Desen - Özer, Nuray - Bayraktar, Harun - Uysal Seçkin, Gamze. “The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation”. Plant Protection Bulletin 66/3 (01 Eylül 2026): 212-223. https://doi.org/10.16955/bitkorb.1907357.
JAMA
1.Köycü ND, Özer N, Bayraktar H, Uysal Seçkin G. The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation. Plant Protection Bulletin. 2026;66:212–223.
MLA
Köycü, Nagehan Desen, vd. “The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation”. Plant Protection Bulletin, c. 66, sy 3, Eylül 2026, ss. 212-23, doi:10.16955/bitkorb.1907357.
Vancouver
1.Nagehan Desen Köycü, Nuray Özer, Harun Bayraktar, Gamze Uysal Seçkin. The effects of some CAA and QoI fungicides on disease development by Plasmopara viticola, zoospore release and ε-viniferin accumulation. Plant Protection Bulletin. 01 Eylül 2026;66(3):212-23. doi:10.16955/bitkorb.1907357

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