An important type of disease and insects control films is "UV-blocking" films, which absorb UV-radiation up to 380 nm, thus achieving: ·Reduction of the population of whiteflies, taphids and other insects in greenhouses, thereby also reducing the viruses which are vectored by these insects. · Control of the spread of certain diseases (such as botrytis), by reducing the sporulation of the relevant pathogenic fungi. · Reduction of "blackening" of red rose petals, thereby increasing their commercial value.