Word: thuringiensus
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...practical; spruce and balsam are best adapted to the north woods and, says Fred Holt, director of Maine's bureau of forestry, "they always come back when you plant something else." Biological controls-most notably one that involves spraying the foliage with a solution containing Bacillus thuringiensus, a bacterium that kills only caterpillars-are still too expensive and difficult to apply over a wide area...
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