Decontamination of potato tubers grown in soil infested with potato cyst nematodes

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Abstract
Hypochlorite solutions destroyed cyst walls and cyst contents of potato cyst nematode. Sodium hypochlorite (1% available chlorine) was the most effective compound tested, destroying cysts in 30–45 min. Rate of cyst destruction was temperature dependent but independent of pH above 7. Immersion of potato tubers destroyed cysts associated with the tubers. A process for decontamination of 300 -kg batches of tubers is described. Potato tubers with mature skins were not adversely affected by treatment when thoroughly rinsed after immersion. Appearance was enhanced, surface load of superficial pathogens was reduced, and dormancy and apical dominance of dormant ‘Ilam Hardy’ tubers was broken.

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