Effect of Alginure (seaweed extract), Myco-SinVIN (sulfuric clay) and Polyversum (Pythium oligandrum Drechs.) on yield and disease control in organic strawberries
2012
Bocek, S., Mendelova Univ., Brno (Czech Republic). Ustav Slechteni a Mnozeni Zahradnickych Rostlin | Salas, P., Mendelova Univ., Brno (Czech Republic). Ustav Slechteni a Mnozeni Zahradnickych Rostlin | Saskova, H., Mendelova Univ., Brno (Czech Republic). Ustav Slechteni a Mnozeni Zahradnickych Rostlin | Mokrickova, J., Mendelova Univ., Brno (Czech Republic). Ustav Slechteni a Mnozeni Zahradnickych Rostlin
In 2011 and 2012 three commercial products Alginure (seaweed extract), Myco-Sin VIN (sulfuric acid clay with yeast and plant extracts) and Polyversum (spores of Pythium oligandrum) were tested in field experiment with strawberry cv. 'Induka' under the conditions of organic growing system. The aim of the study was to determine the effect of the preparations on yield, fruit quality and diseases control. The preparations were applied five times during flowering. We assessed total yield, marketable and unmarketable yields, average fruit weight, grey mould incidence on fruits caused by Botrytis cinerea and leaf spot severity caused by Mycosphaerella fragariae. The preparations tested did not show positive effect on yields. Total and marketable yields were not significantly different to untreated control in both years. Nevertheless, considerable increase of yields from 2011 to 2012 was observed in strawberries treated by the biofungicide Polyversum. The incidence of grey mould was not significantly reduced. All preparations provided very low, less than 10% efficacy to control leaf spot severity.
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