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Plantwise Factsheets for Farmers

Management of Green Peach Aphid

Myzus persicae
Nepal

Recognize the problem

Green peach aphids are 1.2-2.1 mm in body length. They can be solid pink, green and pink mottled or light green with a dark stripe. They are usually the most common and abundant species; infestations typically begin on the bottom most leaves of the plant.

Both adults and nymphs of the aphid have piercing-sucking mouthparts which are used to suck sap from veins, stems and growing tips. They also produce considerable quantity of honeydew. This makes the plants sticky and favours the growth of sooty mould which hinders the photosynthesis (food-making) process of the plant. Newly grown plant parts become stunted and curled. Aphid feeding affects the quality and quantity of crop yield.

Background

It is serious pest of peach, potato (during October-November and January-March), eggplant (during summer season), cabbage, cauliflower, mustard, tomato, and tree tomato in winter season. It transmits several types of virus including potato leaf roll and Virus Y.

Management

  • Conserve/release predatory insects such as ladybird beetles, green lacewings and syrphid larvae
  • Install yellow pan traps with 1% kerosene water or yellow sticky traps at crop height in the field for monitoring the occurrence of winged aphid
  • Apply a balance dose of chemical fertilizer in the crop
  • Dust wood ash on plant foliage in the morning hours. Similarly, dust red soil on plant foliage.
  • Spray wood ash and soap solution (wood ash soaked in water at a ratio of 1:4 for 12 hours then filtered through muslin cloth and mixed soap @ 10 gm per litre).
  • Soak 50 g neem fruit dust in 1 litre water overnight then spray the neem fruit extract on the crop
  • If application of chemical insecticide is required, spray malathion 50% EC @ 2 ml per litre of water or Dimethoate e.g. Rogor 30% EC @ 1 ml per litre of water

When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.

The recommendations in this factsheet are relevant to: Pakistan, Bangladesh, Sri Lanka, Bhutan, India, Nepal

Authors: Ram Krishna Subedi
PPD
tel: 977-9841701500 email: rksubediipm@yahoo.com
©CAB International. Published under a CC-BY-SA 4.0 licence.

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