How to recognize greenhouse thrips
Adult greenhouse thrips are approximately 1.5 mm long and females are slightly larger than males. The females live 30–40 days and lay 50-70 eggs. The body is darkly colored with a lighter section at the end. They have lightly colored legs and antennae. The wings form a light band with a longitudinal darker white section. Larvae are yellow, with lightly colored legs and antennae. Characteristic features of the greenhouse thrips are the striking colored droplets (excrements) that they carry from their abdomen. Over time, the droplets will fall and form small and sticky black spots on the leaves.
Greenhouse thrips damage and distribution
Greenhouse thrips are mainly a leaf dwelling species. Adults are usually found on the upper side of the leaves, while larvae are found in groups on the underside of the leaves. Both larvae and adults are not very mobile, but when disturbed, they will move. All stages tend to aggregate on the leaves. Greenhouse thrips damage looks like silver-gray spots on the leaf with black dots in it, which are thrips feces. During heavy infestation they damage the entire leaf surface, causing withering and early drop of leaves. In some crops, also fruits are attacked by greenhouse thrips, which causes necrotic spots.
Greenhouse thrips life cycle
Greenhouse thrips host plants
– Many different thrips species
– Greenhouse thrips