Peach Twig Borer

Disease

Peach Twig Borer

Anarsia lineatella

insect

In a Nutshell

    Wilting of leaves and flagging of new shoots in the spring, more conspicuous in young treesHoles, shallow tunnels or surface grooves at the stem end or at the contact zone between two fruits

Hosts: %1$s

· Cherry · Apricot · Plum · Peach · Almond

Symptoms

First signs of the presence of this pest in the orchards may be the wilting of leaves or the flagging of new shoots in the spring. This loss of vigor in leaves, shoots and is particularly conspicuous in young trees. Later in the year, the damage can also be observed on older shoots and on fruits. In the latter, it is usually characterized by holes at the stem end, at the contact zone between two fruits or where leaves touch the fruit. The larvae feed , boring shallow tunnels and surface grooves. In high population numbers, they can cause extensive damage to young trees or nursery stock. The type of damage is very similar to that inflicted by the larvae of the oriental fruit moth.

Trigger

The damage is caused by the larvae of Anarsia lineatella, a major pest in several tree crops. Adult moths have a grayish to brown body and mottled or banded forewings. Females lay eggs on young shoots, fruit, and on the underside of leaves, next to the vein. Larvae are small and have a brown body with alternating white rings and a black head. They overwinter in shelters under the bark, crevices on old wood or in pruning wounds. During the bloom period they come to light again and migrate to twigs and branches, where they attack newly emerged leaves, blossoms and shoots. They burrow down the tender shoots, blocking the transport of water and nutrients, and causing them to wilt and die. They can also cause the destruction of the growing points in older shoots, causing the dieback of the branch and in some occasion lateral branching. The life cycle of this insect include 3 to 4 generations per year.

Biological Control

Anarsia lineatella has about 30 known species of natural enemies. The parasitoid wasps Paralitomastix varicornis, Hyperteles lividus and Macrocentrus ancylivorus lay their eggs on the larvae of the peach twig borer, something that slowly kills them. Ants also happen to feed on the larvae. These natural enemies can reduce significantly the population of larvae, but often not below economically damaging levels. Therefore, timely applications of organically-approved oils, pyrethrin, spinosad or insecticides based on Bacillus thuringiensis can be used to supplement these treatments. The disruption of mating with sex pheromones can also be used as additional strategy.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. The preferred management strategy for peach twig borer is a timely treatment with insecticides during the 1) delayed dormant phase, 2) the bloom phase and the 3) post bloom phase. Formulations based on methoxyfenozide or diflubenzuron can be used in phase 1 and 2. The former, along with chlorantraniliprole can also be used in the post bloom phase. Other products are also available for these three type of treatments.

Preventive Measures

    Examine the orchards during spring to determine if the pest is in the orchardsOpen shoot to see if the larva is insideUse pheromone traps to monitor the mothsControl insecticide use in order not to affect beneficial insects




Features

Regional Weather

Get detailed forecast and actual weather data.

Plantix offers detailed weather information on the following issues:

Precipitation

Humidity

Air Pressure

Temperature

Wind speed

Plantix Community

Get in touch with experts around the world.

Post your questions

You can post your questions and pictures and get feedback from other farmers or gardeners. Plantix' experts will answer your questions related to plant diseases and pests.

MyCommunity

Exchange with Plantix users around you, in your language and related to the crops you grow.

Global Community

Connect to farmers, gardeners, experts and interested people around the world that discuss plant diseases, remedies and best practice for sustainable farming.

AI-Driven Disease Detection

Instant diagnostics and solutions based on your picture

Image Recognition

Plantix analyzes your picture within a few seconds and gives you instant feedback on your plant problem.

Customized Management Options

On top of the detection result, Plantix offers you a detailed description of possible solutions - both biological and conventional.

Preventive measures

Plantix offers information on preventive measures to protect your crop from the next attack.