Apple-Lygus bug

Lygus spp.

Pest description and crop damage Adult lygus bugs are oval, about 0.19 inch long with a light yellow 'V' on the back. The bugs feed on developing leaves, flowers and fruit, which kills the tissue around the feeding site and can cause cat -facing damage, a fruit deformity that occurs when cells surrounding the feeding site continue to grow as the fruit matures.

Biology and life history These insects overwinter as adults in protected areas such as leaf debris, in bark cracks or similar. Adults become active in early spring, feeding on buds of trees and shrubs before moving to other plants. Eggs are laid in the stems and other tissues of host plants. The nymphs hatch and feed. There may be several generations per year.

Management-cultural control

Eliminate weeds that serve as protection and early season food for the insect.

Spring and summer

Management-chemical control: HOME USE

  • azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
  • Beauveria bassiana-Some formulations are OMRI-listed for organic use.
  • carbaryl-Highly toxic to bees.
  • esfenvalerate-Highly toxic to bees.
  • gamma-cyhalothrin-Highly toxic to bees.
  • kaolin clay-Applied as a spray to leaves, stems, and fruit, it acts as a repellant to some insect pests. Some formulations are OMRI-listed for organic use.
  • malathion-Highly toxic to bees.
  • permethrin-Highly toxic to bees.
  • pyrethrins-Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin-Highly toxic to bees.

Management-chemical control: COMMERCIAL USE

  • acetamiprid (Assail 70WP) at 5.3 to 8.0 oz/a in up to 100 gal of water per application. Do not make more than 4 applications per year or exceed 13.5 oz/a per growing season. Do not make more than 4 applications per year or exceed 13.5 oz/a per growing season. Will provide suppression. Do not apply during bloom. PHI 7 days. [Group 4A]
  • lambda-cyhalothrin (Warrior II, generics available) at 1.28 to 2.56 oz in enough water to achieve thorough coverage. PHI 21 days. [Group 3A]
  • zeta-cypermethrin (Mustang Maxx) at 1.28 to 4.0 oz/a in a minimum of 100 gal of water for dilute spray. PHI 14 days. [Group 3A]