A drop hose irrigation device (1') comprising a substantially vertical pipeline section (2) which is adapted to be secured to a truss (3) of an irrigation system (4) by means of a substantially horizontal supporting rod (10) and a support (1) having a substantially U-shaped bracket (15). The bracket (15) comprises a pair of side walls (16, 17) and a curved connecting wall (18) extending along a substantially horizontal axis. The walls (16, 17, 18) have substantially cylindrical smooth inner surfaces (20, 21) with substantially parallel opposed projections for snap-fit locking engagement of the rod (10) in said bracket (15). A pair of curved appendages (28, 29) extend from one of the side walls (16) and define a pair of substantially vertical seats (30, 31) with oppositely directed concavities for receiving the substantially vertical pipeline section (2) and locking it by rotation about a substantially horizontal axis (X). A method of mounting a drop hose irrigation device (1') to a supporting rod (10) of an i
