Nature of damage and control of Whitefly

Nature of damage and control of Whitefly:-

  • The whitefly is a sap-sucking insect that is often found in thick crowds on the undersides of leaves. When infested plants are disturbed, great clouds of the winged adults fly into the air.
  • Both nymphs and adults damage plants by sucking the juices from new growth causing stunted growth, leaf yellowing and reduced yields. Plants become weak and susceptible to disease.
  • Like aphids, whiteflies secrete honeydew, so leaves maybe sticky or covered with a black sooty mould.
  • They are also responsible for transmitting several plant viruses.
  • Host plants include more than 250 ornamental and vegetable plants. Citrus, squash, potato, cucumber, grape, tomato, Chilli and hibiscus are commonly infested.
  • Control Triazophos 40% EC @ 45 Ml/ 15 litre water or Difenthiuron 50% WP 10 Gm/ 15 litre water or Acetamiprid 20 SP @ 10 Gm/ 15 litre water
    are effective against whiteflies.

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Management of Yellow Mosaic Disease in Okra/Bhindi

Yellow Mosaic Disease in Okra/Bhindi:-

  • This is the most important and destructive viral disease in bhindi.
  • The disease infects at all the stages of crop growth and severely reduces growth and yield.
  • The disease is transmitted by whitefly.
  • The characteristic symptoms of the disease are a homogenous interwoven network of yellow veins enclosing islands of green tissues.
  • Initially, infected leaves exhibit only yellow coloured veins but in the later stages, the entire leaf turns completely yellow.
  • The fruits of the infected plants exhibit pale yellow colour, deformed, small and tough in texture.

Control-

  • Remove and destroy disease-affected leaves/plants from crop fields to avoid secondary spread.
  • Parbhani Kranti, Janardhan, Haritha, Arka Anamika and Arka Abhay can tolerate yellow vein mosaic.
  • Do not use high fertilizer during plant growth.
  • Do not roted okra with other hosts of virus.
  • If possible, choose early planting to the controlling of yellow mosaic virus disease.
  • Keep sanitation while using any tools that are using in crop.
  • Use 4-5 sticky trap/acre to the controlling of whitefly infestation.
  • Spray imidacloprid 17.8% SL 80 ml/acre for the controlling of whitefly.
  • Spray dimethoate 30% EC 250 ml/acre of water.

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Control of white fly in watermelon

  • Nymphs and adults suck the cell sap from the leaves.
  • The affected leaves curl and dry.
  • The affected plants show stunted growth.
  • Whiteflies are also responsible for transmitting yellow vein mosaic virus or leaf curl disease.
  • 4-5 foliar spray of dimethoate 30% EC @ 300 ml/acre or profenophos 50% EC @ 400 ml/acre at 10 days intervals.

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Control of White fly in Green Gram

Control of White fly in Green Gram:-

  • Nymph and adults suck the cell sap from the leaves. The affected leaves curl and dry.
  • The affected plants show stuned growth. White flies are also responsible for transmiting yellow vein mosaic virus or leaf curl disease.
  • 4-5 foliar spray of Dimethoat 30 ml/pump or thaimathoxam 5 gm/pump or Acetamiprid 20% SP 15 gm/pump at 10 days interval.

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Control of White fly in Okra

Control of White fly in Okra:-

  • Nymph and adults suck the cell sap from the leaves. The affected leaves curl and dry.
  • The affected plants show stuned growth. White flies are also responsible for transmiting yellow vein mosaic virus or leaf curl disease.
  • Soil application of Carbofuran 3 G 20 Kg/ha at the time of sowing.
  • 4-5 foliar spray of Dimethoat 30 ml/pump or thaimathoxam 5 gm/pump or Acetamiprid 20% SP 15 gm/pump at 10 days interval.

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