Waxy bloom of raspberry

In agronomic practice and breeding descriptions, the intensity of the waxy bloom on raspberry canes is assessed visually using a qualitative scale, categorized into weak, medium, and strong degrees of expression. This indicator serves as an important identification trait for cultivar characterization, alongside cane prickle morphology and the pubescence patterns of vegetative organs.

The presence of a pronounced waxy layer performs a protective function, preventing excessive moisture evaporation and increasing the resistance of canes to adverse environmental factors. Furthermore, a heavy bloom correlates with increased plant resistance to several fungal infections, particularly purple blotch, and reduces the risk of damage by certain types of pests.