Chapter 21

Managing Vineyard Insect and Mite Pests

Grape Cane Borer

The grape cane borer (Amphicerus bicaudatus) is a type of beetle that is sometimes referred to as an apple twig borer. This pest is widely distributed across eastern North America and in Europe.

Symptoms

Vine damage occurs from late summer into the fall season when larvae burrow into the dead or dying canes in search of over-wintering sites. Most often they burrow into live canes where new canes meet the previous year’s wood.

Life Cycle

Cane borer overwinters in the adult stage, within burrows made in the canes (See Figure 21.5). As weather warms, they become active in the spring, and tend to fly around in evening hours.

Monitoring

Look for wilted shoots (flagging), drying leaves during the period of rapid shoot growth, and broken shoots. These broken shoots often remain hanging down from the spur after breakage.

Pest Management

Cultural Practices

Satisfactory control of grape cane borer usually is achieved through vineyard sanitation.

Applying Control Materials

Insecticide treatments should target active adults in intervals before they lay eggs in the spring. An insecticide applied at this time may help reduce populations in the vineyard. The insecticide needs to be applied prior to significant egg-laying because the eggs are well protected.

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