Evaluation of the Efficacy of fluxapyroxad (SC, 26.5%) in the Management of Grapevine Powdery Mildew | ||
| آفت کش ها در علوم گیاه پزشکی | ||
| Volume 7, Issue 1 - Serial Number 9, December 2020, Pages 27-38 PDF (496.75 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/jppps.2020.125442 | ||
| Authors | ||
| Banafsheh Safaiefarahani* 1; M R Karimi Shahri2; A. Shekariesfahlan2; H Khabaz Jolfae2 | ||
| 1Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran | ||
| 2AREEO | ||
| Abstract | ||
| Grape powdery mildew caused by Erysiphe necator is one of the most important diseases of vine in Iran. In this study, the efficacy of new fungicide, Sercadis® (Fluxapyroxad 26.5%), at doses of 0.1, 0.15 and 0.3 ml L-1 was compared with the registered fungicides Belkute® (Iminoctadine Tris 40%), Topas® (Penconazole 20%), Stroby® (Kresoxim-methyl 50%) and sulfur 80% to control grape powdery mildew. The experiment was carried out in Razavi Khorasan and Fars provinces in 2019. In each region, a vineyard with Asgari cultivar with a history of disease was chosen and the experiment was performed using randomized complete block design with nine treatments and four replications. Each replication contained a six-year-old fertile grapevine tree. Spraying was done four times. The first spraying was performed just as the buds started to swell, the second, third and fourth spraying were performed after petal fall, just as sour berries formation, and when the fruits were sweet and sour respectively. For data collection, in each treatment, 15 days after the fourth spraying, symptoms of 100 randomly chosen leaves and 8 Bunches of grapes were recorded. The disease incidence and disease severity were calculated for all the samples. The data were then analyzed using SAS software. The results show that, there is a significant difference between treatments and controls at 1% probability level and Sercadis® at the dose of 0.15 ml L-1 reduced disease severity on grape leaves and fruits at least by 72.79% and 82.91% respectively, which makes it an effective treatment in management of grapevine powdery mildew in Iran. | ||
| Keywords | ||
| chemical control; disease incidence; disease severity; grape; vineyard | ||
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