Efficacy of potato seeds disinfection products to control Erwinia spp.
Erwinia spp. provokes soft rot on potato tubers during storage. No disinfection products are available on the market in the European Union to control these bacteria. We tested 3 products presented as good candidates to cure potato tubers from bacterial diseases. First, Anthium 500 (Du Pont de Nemours) a product based on chlorine dioxyde, then Phostrol (Nufarm) with phosphoric acid as a.i. and finally Solucuivre (Proval), a copper based product. We firstly managed disinfection trials: high Erwinia contaminated potato seed samples were treated by immersion and were then incubated, we observed the percentage of tubers rotting. Secondly, we managed protection trials: protected healthy tubers were incubated during 23 days in contact with rotting tubers. We evaluated weight loss after symptoms development. No tested product was effective to control Erwinia spp. on seed tubers in our trials conditions. Furthermore, we observed more rot development after Phostrol and Solucuivre application. We suppose that the product couldn't reach the latent bacteria and weakened the tubers. No protection effect was observed.
Dupuis
B
B
Farming Systems Section, Walloon Agricultural Research Centre, Rue du Serpont 100, BE-6800 Libramont, Belgium.
Garcia
N
N
Boels
G
G
D017606:Chlorine Compounds / Q000009:adverse effects / Q000494:pharmacology; D015169:Colony Count, Microbial; D003300:Copper / Q000009:adverse effects / Q000494:pharmacology; D004202:Disinfectants / Q000009:adverse effects / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004885:Erwinia / Q000187:drug effects* / Q000254:growth & development*; D008826:Microbial Sensitivity Tests; D010087:Oxides / Q000009:adverse effects / Q000494:pharmacology; D010756:Phosphoric Acids / Q000009:adverse effects / Q000494:pharmacology; D010935:Plant Diseases / Q000382:microbiology*; D011198:Solanum tuberosum / Q000382:microbiology* / Q000592:standards
D017606:Chlorine Compounds; D004202:Disinfectants; D010087:Oxides; D010756:Phosphoric Acids; D003300:Copper; C025109:chlorine dioxide