Plastic film for use in agriculture

A polymeric, multilayer, photoselective mulch film for use in agriculture, comprising at least two layers, an upper layer facing the sky and a lower layer facing the ground, both layers being light-transmissive;

• wherein said upper layer is of a yellow color and said lower layer is of a blue color;
• whereby the solar radiation transmitted by said film and reaching the ground is in the green and the far-red range of the solar spectrum, with the green component largely depriving weeds of essential photosynthetically active radiation and the far-red component being absorbed by, and heating, the soil, and
• whereby the yellow color of said upper layer serves to repel insects liable to act as vectors of plant diseases.

A method of crop cultivation, comprising the steps of:

• providing a multilayer, light-transmissive mulch film, one layer of which is of a color which repels insects, and the other layer of which is of a color whereby the solar radiation transmitted by said film and reaching the ground is of such a spectral composition as will largely deprive weeds of essential photosynthetically active radiation, while having a spectral component that will be absorbed by, and will heat, the ground;
• spreading said mulch film along the ground with the insect-repelling layer facing the sky and said other layer facing the ground, and
• providing suitably spaced holes in said film, or using pre-prepared holes in said film, to sow seeds or plant seedlings.

A method of crop cultivation, comprising the steps of:

• providing a multilayer, light-transmissive mulch film, one layer of which is yellow, and the other layer of which is blue;
• spreading said mulch film along the ground with the yellow layer facing the sky and the blue layer facing the ground, and
• providing suitably spaced holes in said film, or using pre-prepared holes in said film, to sow seeds or plant seedlings.