Tests with BHC Emulsion Sprays to Keep Boring Insects Out of Pine Logs in Massachusetts1

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Abstract
Single applications of BHC and lindane emulsifiable concentrates, diluted in water to 0.4% gamma iso-mer by volume, effectively kept wood and bark boring insects out of unseasoned pine logs of cordwood size all summer. The insects involved were in the beetle families Cerambycidae, Buprestidae, Curculionidae, and Scolytidae. Best results were had when individual logs were completely sprayed but excellent results were also had when piled logs, all previously uninfested, were sprayed in situ. None of the spray emulsions used (up to 0.4% gamma isomer) has yet caused any noticeable injury when sprayed on living deciduous or coniferous plants when dormant or when they were sprayed on coniferous plants during the growing season. However, foliage on living deciduous hardwoods has been injured, sometimes severely, by summer spray applications between 0.1% and 0.4% gamma isomer content.

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