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Control of mastotermes darwiniensis isoptera mastotermitidae with mirex baits



Control of mastotermes darwiniensis isoptera mastotermitidae with mirex baits



Australian Forest Research 10(3): 249-258



Termites from 2 field colonies of M. darwiniensis Froggatt were offered, under laboratory conditions, baits of sawdust and wooden blocks on which an acetone solution of mirex (dodecachlorooctahydro-1,3,4-metheno-2H cyclobuta(cd)pentalene) had been evaporated. Continuous feeding tests showed that the baits produced delayed poisoning, the length of delay being considerably greater at 0.01% (wt/wt) than at 0.1% concentration of mirex, but diminishing appreciably at concentrations higher than 1.0%. Tests of the transfer of poison between equal numbers of baited and unbaited insects showed that the minimum concentration of poison which would kill 90% of the termites within 9 days of exposure to the bait for 24 h was 0.07%. The lethal dose was estimated to be 9 .mu.g/g live body weight. Two field colonies of M. darwiniensis delineated by radiotracers were offered mirex baits. Both colonies were large, including 46 and 66 radioactive sites, with distances between outlying sites of 80 m and 106 m respectively. The baits of mirex and sawdust were enclosed in agar gel, and were applied to stumps of infested Pinus caribaea Morelet. After 1 wk the only termites that remained alive were those undergoing a molt. M. darwiniensis can be controlled with a minimum amount of insecticide by exposing a small number of baits to each colony.

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Accession: 005050383

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