Whitefringed weevil

Naupactus leucoloma

Overview:

Type of Pest: Naupactus leucoloma, commonly known as the Fuller Rose Beetle, is a weevil species that poses a threat to various ornamental plants and crops.

Physical Characteristics:

  • Adults: Medium-sized weevils, typically 6 to 8 mm in length.
  • Color: Brownish-gray with a distinctive pattern of spots and stripes on the elytra.

Life Cycle:

  • Egg Stage: Eggs are laid in the soil.
  • Larval Stage: Larvae hatch and feed on plant roots.
  • Pupal Stage: Pupation occurs in the soil.
  • Adult Stage: Fully developed weevils emerge, and the cycle repeats.

Identification of Crop Infestation:

  • Root Feeding Damage: Larvae feed on the roots, causing damage to plants.
  • Foliar Feeding: Adult beetles may also feed on foliage, causing notching on leaves.
  • Presence of Adults: Adult weevils are active at night and may be observed on plants.

Management Strategies:

  1. Cultural Practices:

    • Mulching: Apply mulch to the base of plants to discourage egg-laying.
    • Regular Inspection: Monitor plants regularly for signs of adult feeding and larval damage.

  2. Biological Control:

    • Nematodes: Beneficial nematodes that parasitize beetle larvae in the soil can be effective.
    • Predatory Insects: Encourage natural predators such as ground beetles and rove beetles.

  3. Chemical Control:

    • Insecticides: Application of insecticides may be necessary, especially during periods of high beetle activity.
    • Soil Drench: Apply insecticides to the soil to target larvae.

  4. Traps:

    • Pheromone Traps: Use pheromone traps to monitor adult beetle populations.
    • Light Traps: Attract and trap adult beetles using light traps at night.

  5. Crop Rotation:

    • Rotate Crops: Avoid planting susceptible crops in the same location in consecutive seasons.

Note: Fuller Rose Beetle can damage a variety of plants, including roses, ornamentals, and crops. Integrated pest management (IPM) practices that combine cultural, biological, and chemical control methods are essential for effective weevil management. Always follow recommended guidelines and consider the potential impact on beneficial insects and the environment.