Abstract
SUMMARY: Post‐harvest applications of relatively low concentrations of benomyl (0.0125 per cent a. i.), phenylmercuric chloride (0.005 per cent), thia‐ bendazole (0.0125 per cent a.i.) and triarimol (0.003 per cent a.i.) were effective in preventing the production of perithecia of Venturia inaequalis. Urea (5 per cent) was also effective. Phenylmercuric chloride was the only chemical effective as a spring application in preventing the release of ascospores.