Abstract

Working with the sprout inhibitors IPC and CIPC we compared 3 treatment methods: (1) a 10 ppm dosage of powder distributed over the tubers, (2) a Swingfog treatment (atomizing a solution in the air duct, dosage up to 20 ppm), (3) a porous cartridge containing the inhibitor placed in the air duct. To obtain good sprout inhibition in connection with accumulated IPC/CIPC residue values below the legal level of 0.5 mg per kg peeled tubers we advise the powder treatment only for relatively long storage (up to May–June); a 10 or 20 ppm Swingfog treatment for short storage (up to January–February) or longer storage respectively. With the cartridge system we obtained promising results; good sprout inhibition and satisfactorily low residue values.

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