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Green Leaf Hopper.pptx

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The document discusses the Green Leaf Hopper, Nephotettix virescens. It is found in rice growing areas across India and feeds on rice plants as well as grasses. The female lays 200-300 eggs in batches on rice leaves. Both nymphs and adults sap the leaves, causing hopper burn and spreading virus diseases. Management techniques include using resistant rice varieties, crop rotation, applying neem cake in nurseries, and spraying with carbofuran or phorate.

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GREEN LEAF HOPPER S.N :- Nephottetix spp. (nigropictus) Order Family Distribution Host Range Life Cycle / Bionomics Damage Symptom Management or Control Practices B.Sc.(Hons)Ag 5th Sem
Green Leaf Hopper Scientific name :- Nephotettix virescens Order :- Hemiptera Family :- Cicadellidae Host plant:- Rice but in its absence, grasses act as its alternative food. Distribution :- It is found in all rice growing areas of the country.
Key identification :- Female :- Green & Black tinge on pronotum is absent. Male:- Black spots extending up to the black distal portion on the fore wings, black tinge along the anterior margin of pronotum.
Life cycle :- Female inserts 200-300 eggs in batches of 8-16 in midrib of the leaf blade. Egg period 6-7 days. Nymphs undergo 5 instars & become adult in 25 days Adult longevity 20-30 days Population normally increase from August onwards, reaches maximum during Sep Oct and declines from November.
Nature of Damage:- Both nymphs and adult de-sap the leaves and cause hopper burn due to heavy infestation. from tip downward is the typical symptom. Vector of virus disease like tungro, rice yellow dwarf etc.
Management :- Use of resistant varieties like IR 20, UR 50 etc. Crop rotation Apply neem cake @12.5kg/800m2 in nursery as basal dose. Spray of carbofuran 3G @ 3.5kg/ha or phorate 10G@ 1.0kg/ha

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Green Leaf Hopper.pptx

  • 1. GREEN LEAF HOPPER S.N :- Nephottetix spp. (nigropictus) Order Family Distribution Host Range Life Cycle / Bionomics Damage Symptom Management or Control Practices B.Sc.(Hons)Ag 5th Sem
  • 2. Green Leaf Hopper Scientific name :- Nephotettix virescens Order :- Hemiptera Family :- Cicadellidae Host plant:- Rice but in its absence, grasses act as its alternative food. Distribution :- It is found in all rice growing areas of the country.
  • 3. Key identification :- Female :- Green & Black tinge on pronotum is absent. Male:- Black spots extending up to the black distal portion on the fore wings, black tinge along the anterior margin of pronotum.
  • 4. Life cycle :- Female inserts 200-300 eggs in batches of 8-16 in midrib of the leaf blade. Egg period 6-7 days. Nymphs undergo 5 instars & become adult in 25 days Adult longevity 20-30 days Population normally increase from August onwards, reaches maximum during Sep Oct and declines from November.
  • 5. Nature of Damage:- Both nymphs and adult de-sap the leaves and cause hopper burn due to heavy infestation. from tip downward is the typical symptom. Vector of virus disease like tungro, rice yellow dwarf etc.
  • 6. Management :- Use of resistant varieties like IR 20, UR 50 etc. Crop rotation Apply neem cake @12.5kg/800m2 in nursery as basal dose. Spray of carbofuran 3G @ 3.5kg/ha or phorate 10G@ 1.0kg/ha