Common Orchids Pests : Sap Feeding Insects : Thrips

Thrips

Symptoms: 

Thrips are very small sucking insects that feed on flowers and occasionally leaves and can transmit disease from plant to plant. Infested buds may not open and flowers may be deformed exhibiting water soaked spots. Leaves may appear pitted, stippled, silvery or bleached.

Symptom Thrips on Orchids

Treatment: 

Plants and flowers can be sprayed with a pesticide like Orthene,
Malathion or Safer Soap, applied in accordance with label instructions. Repeat applications will be required because thrips remain hidden on the plant or can be reintroduced to the plant from other flowers in the landscape.

Control: 

 Good sanitation will help prevent infestation as will keeping plant hosts (flowers, citrus, gardenias, eucalyptus, etc.) separate from your orchids