Harvester adapter with stalk shredder for harvesting grain crops, particularly sunflower

The harvester adapter has a frame structure, for attachment to a combine harvester. At least two crop gathering units are secured to the frame structure. Adjacent crop gathering units are arranged such that a channel with an open leading end is formed between them, with a stalk gathering unit being disposed in driving connection with a harvesting mechanism on at least one side of the channels. The adapter has a collecting auger disposed rearward from the harvesting mechanism and at least one stalk shredder unit attached to the frame structure. The speed of the stalk gathering unit is continuously adjustable by control orders given by the combine harvester and/or by a speed meter disposed on the adapter and/or by the operator, and the stalk shredder units are attached to the frame structure such that their position is adjustable in a direction perpendicular to the direction of travel.