Thrips
problems in agriculture and horticulture. Thrips are small insects (0.5-14 mm), with the largest species found in the tropics. In temperate regions they are not [...] of the surface tissue and sucking out their contents, causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black [...] dots of their excreta indicate their presence in the crop. At a later stage, the empty cells become desiccated and the adjacent cells turn brown. The vigour