Fumigation as a Means of Eradicating Colorado Beetle in Imports of Potatoes, Grain and Timber |
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| Authors: | DF POWELL KA MILLS |
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| Institution: | MAFF, Harpenden Laboratory, Harpenden (United Kingdom);MAFF, Slough Laboratory, Slough (United Kingdom) |
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| Abstract: | Colorado beetle is not indigenous to the United Kingdom, but is often found in imported produce and is a serious pest of potato crops. The efficacy at 10°C of five fumigants was tested against diapausing beetles in the laboratory. Phosphine was the most effective giving 100 % kill in tests with a concentration time product of 6.7 g.h/m3; 100 % kill was also achieved in tests with: methyl bromide at 166 g.h/m3; carbon tetrachloride at 4000 g.h/m3; ethylene dichloride at 6240 g.h/m3; and 1,1,1-trichloroethane at 11600 g.h/m3. A set of practical dosage schedules is given. |
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