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Crop Protection : Pest of paddy

Green leafhopper: Nephotettix virescens

Symptom of damage:

  • Yellowing of leaves from tip to downwards
  • Vector for the diseases viz., Rice tungro virus, rice yellow & transitory yellowing cause direct damage to the rice plant
  • Retarded vigorous and stunted growth
  • Drying up of plant due to sucking up of the leaf

Identification of insect pest:

  • Eggs: Greenish transparent eggs are deposited in the midrib of leaf blade or sheath of rice or green grass. They are laid in batches of 10 to 15 arranged in a single row
  • Nymph: The nymphs are soft bodied, yellow white in colour. Gradually the colour changes to green.
  • Adult: Adults are 3-5 mm long, bright green with variable black markings, wedge shaped with a characteristic diagonal movement. Male insect has a black spot in middle of the forewings that is absent in females. The insect is active during July to September.

 

Yellowing Virus particles under electron microscope
Adult - Green leaf hopper

Management:

ETL: 60/25 net sweeps or 5/hill at vegetative stage or 10/hill at flowering or 2/hill in tungro endemic area

  • Nursery should not be located near the street lamps
  • Spray any one of the following insecticides
    • Phosphamidon 40 SL 50 ml
    • Phosalone 35 EC 120 ml
  • Maintain 2.5 cm of water in the nursery and broadcast anyone of the following in 20 cents
    • Carbofuran 3 G 3.5 kg
    • Phorate 10 G 1.0 kg
Use resistant variety - CR 1009 Nursery should not be located near the street lamps

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