e course

 

Pests of Cashew :: Major Pests :: Thrips

 

7. Thrips: Rhipiphorothrips cruentatus, Selenothrips rubrocinctus (Thripidae: Thysanoptera)

 

Distribution and status: Country wide distribution
Host range: Cashew, guava, grapes, arecanut, pomegranate, Rose

 

 

Damage symptoms
Both nymphs and adults suck and scrape underside of the leaves, mainly along the main veins, causing yellowing  that conglomerate and progressively turn gray, giving the leaves silver appearance, as a result may fall-down precociously. Heavily infested flowers may not open for fertilization, thus dramatically, lowering crop yields.

Bionomics

The adults are dull dark brown body or black in colour with reddish strip on the first three abdominal segments, 1.3 – 1.8mm long. Lays eggs on lower leaf surface.

   

Management

 

Spray dimethoate 30 EC or methyl demeton 25 EC 1.5 L in 1500 -2000 L of water per ha.