Southern Research Station

Title: Reduced Brood Production of Southern Pine Beetles by Diflubenzuron

Author: van Sambeek, J.W.

Date: 1982

Source: Res. Note SO-284. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 5 p.

Station ID: RN-SO-284

Description: Treating the female southern pine beetle (Dendroctonus frontalis Zimmerman) with the insect growth regulator diflubenzuron will decrease the hatch of eggs deposited in the first 2 dm of egg gallery. Treatment of males had no effect. Surface applications of 1 to 10 mg of diflubenzuron per female beetle and exposure to artificial diets with 100 to 1000 mg/g of diflubenzuron inhibited initial egg hatch, resulting in a larvae-free segment of gallery. The duration of the inhibiting effects depended on the level of initial exposure. Neither fecundity nor the length of gallery excavated were affected. Application of 0.3 percent diflubenzuron to host logs did not appear to have any inhibiting effects on eggs or emerging brood.

Keywords: Dimilin®, egg hatch, ovicide, insect growth regulator, bark beetles

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Citation

van Sambeek, J.W.  1982.  Reduced Brood Production of Southern Pine Beetles by Diflubenzuron.   Res. Note SO-284. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 5 p.