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Harvesting Hops


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Humulus lupulus L.

Harvesting cones shall be made at technical maturation, when evidenced by their color change from green to green - yellow, bracts harden and become sticky lupulin color change from silver to yellow. By tightening between the fingers, the cones rustle and return to original shape, at this stage (lasting 8-10 days) cones were highest in lupulin content, bitter substances and flavor, depending on the variety.

Technical maturation occurs before physiological maturation (represented by reaching fruit at full development), depending by the period of vegetation of variety and riding time, technical maturation, in temperate zone occurs in the second half of August and the first half of September.

At harvest cones before or after the optimal (technical maturation) is deprecated production quantity and quality. When is harvested too early a pear in cones (the top of the strings) are incompletely developed, with flavor and lupulin reduced, resulting in lower production and lower quality. If harvesting is delayed beyond optimum, the cones turn red gradually (from the top of the cone), bracts are increasingly open and are removed from the cob and lose some of lupulin, lupulin quality depreciates, reduce oil content, and soft resin becomes and hard resins.

View Plant Profile of: Humulus lupulus L.


Humulus lupulus L.

Hops are harvested manually or mechanically, in good weather, after high dew, when cones are aired.

Manual harvesting hops cones include the following: separation upper end of the vertical wire (string) which falls to earth with strings attached to it; collection (by pinching) of the cone with about 1 cm of peduncle, gathering cones harvested into the baskets, weighing and transport production (big bags) at drying place. A worker collects daily 20 to 30 plants, respectively 30 - 50 kg green cones. After harvesting wound strings remain near the hub for a period, than the backup substances to migrate to the hub.

Mechanical harvesting with stationary picking machines (LCCH - 1, LCCH - 4, Jugo - Wolf etc.), involves the following operations: cutting strings height of 1 - 1.5 m above the ground, peeling off the upper end of the wire (string ), chargers and transport the strings with special hop trailers (length of strings) on picking machines. They separated cones and leaves on the string (through a device consisting of two cylinders fitted with steel wires which rotate in the opposite toward each other), followed by a stream that separates the leaf from cones, and cones are directed through the conveyor into the drying system.


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