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Thrips: Scrapping marks on buds


Pest: Scirtothrips dorsalis and Rhipiphorothrips cruentatus


Symptoms

Scrapping marks on buds noticed as rough light greenish-brown patches.


Control

  • Do not intercultivate crops like chilli and onion.

  • Remove and destroy affected plant parts.

  • Use of blue sticky traps @ 1trap / 10 plants.

  • Spray with acetamiprid 20 sp @ 0.005% to 0.01% i.e. 25 to 50 g /100 L or spinosad 45 SC @ 0.25 ml/L i.e. 25 ml/100 L or NSKE 5% or Verticillium lecani (2x108 cfu/g) @ 200 g / 100L starting from prior to flowering at the interval of 10 days.

  • Spray chloropyriphos @ 0.02% or imidacloprid @ 0.04% or deltamethrin @ 0.15 or dichlorovos @ 0.05% as prophylactic or on observing the symptoms.

  • Spray dimethoate 0.06% prior to flowering. In severe conditions, spray methyl oxydemeton 0.05% and repeat after fruit set.


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