Harlequin Bug
Harlequin bug

Related Topics

*This is an excerpt from Insect Pest Scouting for Crucifer Crops, ANR-2241

Identification

Adult beetles are 5 mm long and dark brown with a yellow wing margin; eggs are bright orange, oval shaped, and laid in masses; caterpillars are dark brown with black head; body is covered with stout hair.

Plant Injury

Adult beetles and caterpillars cause extensive leaf feeding and crop damage occurs rapidly; also feed on exposed tubers of turnips and radishes.

Sampling Method & Economic Threshold

  • Early detection and management will prevent rapid colonization of this pest.
  • Look for adult beetles that migrate into the field during late September or early October. Early morning or late evening when beetles are most active is the best time to scout.
  • Highly attracted to turnips and napa cabbage compared to other crucifers.
  • Turnips should be scouted at least weekly to detect rapidly growing populations (turnip and napa cabbage can be used as a trap crop).

 

Read here to learn more about Insect Pest Scouting for Crucifer Crops.

Download a PDF of Insect Pest Scouting for Crucifer Crops, ANR-2241.

 

*This is an excerpt from Insect Pest Scouting for Crucifer Crops, ANR-2241

Identification

Small insects that jump readily using muscles in their hind legs; hind legs appear swollen.

Plant Injury

Common in spring on seedlings; shot-hole feeding symptoms on small leaves.

Sampling Method & Economic Threshold

  • Use a good quality magnifying lens when scouting seedling.
  • Shot-hole leaf injury is distinctive.
  • Scout on field edges that usually get the worst damage from flea beetles.
  • No economic thresholds are available.
  • Young plants are susceptible to flea beetle damage.

 

Read here to learn more about Insect Pest Scouting for Crucifer Crops.

Download a PDF of Insect Pest Scouting for Crucifer Crops, ANR-2241.

 

*This is an excerpt from Citrus Pest Identification and Management Guide, ANR- 2270.

The most characteristic symptom of HLB is blotchy mottling that appears asymmetrically on the leaf blade. Green islands may also occur; these are small, circular, dark green dots that contrast with the light yellow/green background. Foliar symptoms that resemble nutrient deficiencies may be present. A tree may exhibit yellow shoots or other nutrient deficiency symptoms on one or more branches randomly in the canopy. Fruit may be small and lopsided or ripen backward, with the stylar end remaining green as the fruit colors.

Management tips: Citrus greening has not been found in Alabama to date. If citrus greening is suspected, contact your local diagnostic lab.

 

Read more about Citrus Pest Identification and Management Guide.

Download a PDF of Citrus Pest Identification and Management Guide, ANR- 2270.

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