Banded greenhouse thrips

Hercinothrips femoralis
Appearance:

Reproduction is mainly parthenogenetic, males are rare. Adult females are about 1.5 mm long and are initially mostly yellow, but color gradually turns brown to black. The abdomen is usually convex. The eyes are red. The wings are gray brown with three white cross bands that are just visible by the naked eye. Legs are yellow except parts of back and middle legs that are brown. Larvae are white or yellow with red eyes. They range in length from 0.48 to 1.5 mm. Larvae, pre-pupae and pupae stick together in groups on the leaves. Pre-pupae and pupae are located on the leaves, mostly on the underside.

Damage and distribution in the crop:

The thrips sit both on the upper and on the underside of leaves. They are not very mobile and even if disturbed they will stay  and not move away. They pierce leaf cells and suck plant juices. Larvae usually carry a drop of faeces at the tip of the abdomen. These droplets grow in size until they fall off and stick to the leaves. Larvae will start again producing new droplets. This results in a typical pattern of damage: silvery spots on the leaves with dark dots among them.

lifecycle banded greenhouse thrips:

  • all stages of the plant, also the pupae
  • development time 4 weeks
  • life 5-8 weeks
  • males rare
  • parthenogenetic reproduction
  • several generations per year

host plants banded greenhouse thrips:

  • occurs on many plant species
  • mainly monocotyledons
  • herbaceous plants

Products against banded greenhouse thrips:

Thripobius javae:

PARATRIP

Franklinothrips vespiformis:

PREDATRIP

Amblyseius swirskii:

SWIRSKI MITE