Vegetable leafhopper

Austroasca viridigrisea

Overview:

Type of Pest: Austroasca viridigrisea, commonly known as the Green Leafhopper, is a small insect that belongs to the leafhopper family Cicadellidae. It is a phloem-feeding pest that can affect various crops.

Physical Characteristics:

  • Size: Approximately 3-4 mm in length.
  • Color: Green to yellowish-green, with distinctive markings on the wings.

Life Cycle:

  • Egg Stage: Eggs are laid in plant tissues.
  • Nymphal Stage: Nymphs hatch from eggs and go through several molts.
  • Adult Stage: Fully developed adults have wings and are capable of jumping and flying.

Identification of Crop Infestation:

  • Feeding Damage: Leafhoppers feed on plant sap, causing stippling, chlorosis, and distortion of leaves.
  • Honeydew Production: Excretion of honeydew, which can lead to the growth of sooty mold on leaves.
  • Vector of Plant Diseases: Leafhoppers can transmit plant diseases, making them a concern for crop health.

Management Strategies:

  1. Cultural Practices:

    • Weed Management: Control weeds, as they can serve as alternate hosts for leafhoppers.
    • Crop Rotation: Rotate crops to disrupt the life cycle and reduce pest pressure.

  2. Biological Control:

    • Natural Enemies: Encourage natural predators such as predatory beetles, spiders, and parasitoid wasps.
    • Beneficial Insects: Release or conserve beneficial insects that feed on leafhoppers.

  3. Chemical Control:

    • Insecticides: Use insecticides when leafhopper populations exceed economic thresholds.
    • Selective Insecticides: Choose insecticides that are less harmful to beneficial insects.

  4. Reflective Mulches:

    • Mulching: Use reflective mulches to deter leafhoppers from host plants.
    • Physical Barrier: Install floating row covers to protect young plants.

  5. Monitoring:

    • Yellow and Blue Sticky Traps: Use traps to monitor leafhopper populations.
    • Visual Inspection: Regularly inspect plants for signs of leafhopper feeding and damage.

Note: Green Leafhoppers can be a concern for various crops, especially due to their ability to transmit plant diseases. Integrated pest management (IPM) practices that combine cultural, biological, and chemical control methods are crucial for effective leafhopper management. Always follow recommended guidelines and consult with local agricultural experts for site-specific recommendations.

Produits phytosanitaires