Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Evaluation of monosodium methane arsenate for the suppression of native elm bark beetles, Hylurgopinus rufipes (Eichhoff) (Coleoptera: Scolytidae).

Abstract

The native elm (Ulmus americana) pest, Hylurgopinus rufipes, is the major vector of Dutch elm disease (Ophiostoma ulmi [Ceratocystis ulmi]) in Manitoba. The herbicide Glowon, monosodium methane arsenate (MSMA), was applied to a chainsaw cut in U. americana trunks to determine whether the treated elms would become effective trap trees for H. rufipes. Three treatments were compared: treated with herbicide and girdled, girdled, and control. All herbicide-treated elms died within 18 days after application. Significantly higher numbers (P<0.01) of native elm bark beetles were attracted to the herbicide-treated elms, compared with the other treatments. Beetles bred only in the elms treated with herbicide. Of the total brood galleries constructed, 72% had no egg hatch while the remaining 28% had larval tunnels. Progeny adults emerged from less than 1% of the larval tunnels. It is concluded that MSMA application could supplement the Dutch elm disease management program in Manitoba.