Reduced Brood Production of Southern Pine Beetles by Diflubenzuron

J.W. van Sambeek

doi:10.2737/SO-RN-284

Treesearch

Reduced Brood Production of Southern Pine Beetles by Diflubenzuron

Informally Refereed

Authors:

J.W. van Sambeek

Year:

1982

Type:

Research Note

Station:

Southern Research Station

DOI:

https://doi.org/10.2737/SO-RN-284

Source:

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

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Abstract

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

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.