Definitions

The techniques used for SPB control are based on biological and cost effectiveness. Furthermore, they reflect the reality of SPB outbreaks and focus on the achievable goal of controlling spot growth. Four techniques or methods are used to control SPB spot growth. A brief definition of each follows:

1. Cut and remove--felling and removal of infested trees and a buffer of adjacent, uninfested, green trees. (Figure 1) This technique reduces the number of beetles available to attack new trees.
2. Cut and leave--felling of infested trees and a buffer of adjacent, uninfested, green, trees toward the center of the spot. This technique disrupts pheromone production and beetle attack behavior.
3. Cut and hand spray--felling, limbing and bucking infested trees into manageable lengths and hand spraying with Lindane or Dursban (Chlorpyrifos). This technique destroys beetle broods before and during emergence.
4. Pile and burn--felling, piling and burning infested trees to destroy beetle broods before they emerge.

Figure 1: The buffer strip should be at least the width of the tallest trees in the spot, and should encompass the active head.