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Turnip aphid

Lipaphis erysimi

 

General

  • Aphid widely distributed throughout the world and native to Europe.
  • Also present in tropical to temperate climate zones.
  • Occasionally encountered on cabbage leaves.
  • A vector of several viruses, including turnip mosaic virus and cauliflower mosaic virus.
  • Observed in the open field as well as under shelters.

 

  • Sensitive botanical family (s)
Brassicas

 

  • Affected production areas :
Mayotte Reunion Guyana
Guadeloupe Martinique New Caledonia
French Polynesia    

  

  • Organs attacked
Leaves

 


Symptoms, damage

  • Aphids generally located on the underside of leaves, on both sides of cabbage leaves in the event of outbreaks
  • Leaf curling and curling.
  • General weakening of plants in case of high population.
  • production of honeydew on the limb causing the appearance of sooty mold.

Biology

  • Reproduction by parthenogenesis, without fertilization. Larvae or eggs are directly produced by adult females.
  • Each female produces 80 to 100 aphids at a rate of 4 to 6 larvae per day.
  • The lifespan of the female varies from 20 to 40 days.
  • Measuring 1.4 and 2.5 mm long, the aphids have brown cornicles, and are yellow-green to dark gray in color.
  • The winged forms are visible when the colony becomes important.

Protection

  • Weed the crop and its surroundings.
  • Check the sanitary quality of the plants before and during their introduction into the crop or shelter.
  • Proper management of fertilization by limiting excess inputs limits the susceptibility of plants to attacks by aphids and other pests.
  • Plant cabbage sheltered from the wind to avoid contamination between plots.
  • Destroy contaminated crop residues after harvest.
  • Crop rotations without brassicas should reduce the presence of the pest that is confined to this botanical family.
Last change : 04/28/22
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