Hand held ULV sprayers

Abstract

In normal spraying, using a pressure pump, most of the droplets produced are too large to efficiently cover the leaf surface of a crop. Some of the drops join together and run off the leaves to the ground where they are wasted. When the size of the drops is controlled, it is possible to produce a fine mist which will drift onto all the exposed areas of the plant not just the top leaves. A fine , even deposit is then formed rather than a series of large blobs. The right size of drop l et can be chosen to make sure that the pesticide in the spray mixture has the maximum effect on the target (plant or insect) . Consequently, the amount of spray mixture can be greatly reduced, even to the extent that it needs to be applied only at very low or ultra low volumes (ULV).