Marine powder, 100% marine calcium, by its composition and structure has a deterrent effect on biting or sucking insects that leave (very effective on aphids), which avoid landing on treated surfaces. The thin film does not alter photosynthesis in any way. Applied by spraying, marine powder leaves a thin whitish film, made up of a multitude of long microscopic crystals with sharp edges forming a natural physical barrier. Marine powder comes from the micronization of scallops from northern Brittany. Marine powder constitutes a physical barrier against insects. Dosing cup (5g) included. How to use the marine barrier? Use from February to November. Measure the necessary quantity of product, dilute with a little water in the sprayer, then top up the water volume by mixing. Pleasure garden: 10 to 20 g/L of water as soon as vegetation resumes. In the vegetable garden: 15g/L of water as soon as the first attacks appear on the leaves. In the orchard: 20 to 30 g/L of water to be applied preventively after flowering or as soon as attacks appear. Shake the sprayer from time to time. Spray all of the vegetation, wetting both sides of the leaves if possible. Avoid the flowers. Repeat the operation if necessary. A thin whitish film appears after spraying; it constitutes the natural physical barrier.