The Canon of Potato Science: 33. Haulm Killing
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What is it?
Harvesting can only be done successfully when the tubers have reached a certain level of maturity. Maturation of tubers improves skin set thus improving the resistance to scuffing and skinning, increases resistance to bruising and other types of damage during harvesting and handling, and prolongs storage life by decreasing storage decay and reducing water loss during storage. More mature tubers also have a higher starch content and lower reducing sugar content than less mature tubers.
In many potato growing areas the potato crop does not senesce naturally and tubers do not mature naturally, but growers destroy the crop when it is still partly green and tubers are still growing. So, tuber maturation is artificially induced by killing the haulm. Killing potato vine (haulm) is usually done 10−25 days prior to harvesting the potato tubers, although in some cases it is done only a few days before harvesting. Green-crop harvesting also does occur under very specific conditions or...
KeywordsSeed Tuber Diquat Black Scurf Vine Killing Seed Potato Production
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