Peach Twig Borer

Peach Twig Borer Control

Anarsia lineatella

The peach twig borer damages stone fruits by eating fresh, new shoots and by feeding on the fruit. Larvae emerge in early spring, usually just before and during bloom, and migrate up twigs and branches where they attack newly emerged leaves and shoots. Shoot damage on a young tree can kill the terminal growth of the plant and reduce the fruiting ability by producing negative effects on the lateral branching.

The borers attack the fruit as it matures, entering at the stem or on the suture line and feeding under the skin.

Managing the pest organically requires an understanding of the life cycle of the borer.

  • When the larvae are moving on the plant and consuming the shoots, the use of bio-rational bacillus that kill the larvae is highly effective. This usually occurs in the very early part of the growing season, just as trees are emerging from dormancy. Bacillus thurengiensis kurstaki or Spinosad are the two products that fill this function.
  • While adults are present, pheromone lures can be used to trap males. This reduces the reproductive rate and allows you to monitor an infestation. This occurs during the spring months.
  • During the winter, while the trees are dormant, horticultural oils can be used to kill overwintering larvae.

For control products and more information please see our Borer Control page.

Photo courtesy of Clemson University Department of Entomology, Soils & Plant Sciences, Cooperative Extension Service.

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