Field efficacy of fungicides and biofungicides in the control of spur blight of raspberries in Serbia
2011
Rekanović, E., Institute of Pesticides and Environmental Protection, Belgrade (Serbia) | Stepanović, M., Institute of Pesticides and Environmental Protection, Belgrade (Serbia) | Potočnik, I., Institute of Pesticides and Environmental Protection, Belgrade (Serbia) | Milijašević-Marčić, S., Institute of Pesticides and Environmental Protection, Belgrade (Serbia) | Todorović, B., Institute of Pesticides and Environmental Protection, Belgrade (Serbia) | Gavrilović, V., Institute for Plant Protection and Environment, Belgrade (Serbia) | Duduk, B., Institute of Pesticides and Environmental Protection, Belgrade (Serbia)
In order to control the causal agent of spur blight of raspberry (Didymella applanata), the efficacy of five conventional fungicides and two biofungicides was evaluated during 2009 and 2010 in one locality in Serbia where a strong epidemic of the target disease was expected. The following materials were tested; Acanto plus, applied at 1.0 l/ha (picoxistrobin + ciproconazol, DuPont); Amistar Extra, applied at 1.0 l/ha (azoxystrobin + cyproconazole, Syngenta); Folicur EM 50-WP, applied at 2.5 kg/ha (tolylfluanid + tebuconazole, Bayer CropScience); F-stop, applied at 10.0 l/ha (Bacillus subtilis, Bio-eko centar); Polyversum, applied at 1.0 kg/ha (Pythium olygandrum, Biopreparaty); Signum (boscalid + pyraclostrobin, BASF); and Switch 62.5-WG, applied at 1.0 kg/ha (fludioxonil + cypronil, Syngenta). The trials were arranged as randomized plots (row 10 m long), replicated four times with 90-100 plants/plot. Mean percent disease control values were calculated from the evaluations made towards the end of the trials, when differentiation between treatments was the most obvious. Data were analyzed by one-way completely randomized ANOVA and means comparison performed by test by Duncan. The infection of raspberry canes in untreated control plots was 2.47 (2009) and 3.82 (2010) (expressed as the class of cane infection). In both years of experiment biofungicides F-stop (7.98% and 11.16%) and Polyversum (14.19% and 16.94%) exhibited the lowest efficacy compared to the other tested products. Acanto Plus, Amistar Extra, Folicur EM 50-WP, Signum and Switch 62.5-WG were effective against the spur blight pathogen and significantly reduceddisease severity compared to the untreated plots. Among the tested conventional fungicides, Acanto Plus (81.29% and 87.63%) and Switch 62.5-WG 982.28% and 85.29%) showed the highest efficacy in all trials. There was no statistically significant difference in the efficacies of the tested conventional fungicides.
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