Thrips
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Identification des bioagresseurs et de leurs dégâts
Rosier
No translated name

Thrips

One of the main pests on rose foliage, thrips are small, pale yellow to brown insects.

Adult of thrips
Adult of thrips (x8) (Copyright Christiane METAY-MERRIEN, INRA-URIH).

Adults are spindle-shaped. One can observe thrips in the flowers by heating them and decorticate them above a white paper sheet.

Thrips damage flowers and leaves by piercing the cell tissues. Thrips damages favour the installation of the €œBotrytis€ fungus.

Damages caused by thrips on young rose shoot
Damages caused by thrips on young rose shoot (Copyright Christiane METAY-MERRIEN, INRA-URIH).
Damages caused by thrips on rosebud
Damages caused by thrips on rosebud (Copyright Christiane METAY-MERRIEN, INRA-URIH).
Damages caused by thrips on rose foliole, with dejections
Damages caused by thrips on rose foliole, with dejections (x10) (Copyright Christiane METAY-MERRIEN, INRA-URIH).

 Life cycle

There are 6 distinct development stages: eggs, 2 larval instars, 1 prepupa instar, 1 pupa instar and 1 imago instar.

Thrips larvae
Thrips larvae (x 25) (Copyright Christiane METAY-MERRIEN, INRA-URIH).
Thrips larvae
Thrips larvae (x 30) (Copyright Christiane METAY-MERRIEN, INRA-URIH).
Prepupa of thrips
Prepupa of thrips (x 60) (Copyright Christiane METAY-MERRIEN, INRA-URIH).

Eggs are principally laid on sepals and sometimes on the backside of the leaves. Young larvae are translucent and develop on leaves until the pupae instar. Then they fall down on the soil and stay there until the imago emergence.

Natural enemies

Natural enemies are predatory mites, bugs and entomopathogenic fungus.

Date de modification : 25 avril 2023 | Date de création : 02 septembre 2013 | Rédaction : Roger BOLL, Christiane METAY-MERRIEN et Séverine DOISE (INRA-URIH).