Word: elme
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Last December, the HEW Commission on Pesticides and their Relationship to Environmental Health suggested that Carbaryl-an insecticide sprayed to combat the elm leaf beetle-was a potential health hazard to man. It apparently causes bone malformations in litters of mice and beagle dogs...
However, the Commission recommended that Carbaryl use "be immediately restricted to prevent risk of human exposure." Last year, a Harvard contractor sprayed some 25 gallons of Carbaryl, and elm sprayings are again scheduled for early June and possibly later this summer...
Beech, maple, ash, elm...
Hardy Siberians. Now there is new hope for elm lovers. Funded with a $30,000 grant from Hansel's institute, Entomologist Dale Norris of the University of Wisconsin recently discovered a subtle chemical reaction that occurs when beetles attack elms. It is the quinol compounds in elm bark, he found, that make the tree delectable to beetles. Paradoxically, when the insects begin to munch, oxidation changes the tasty quinols into quinones that repel the beetles. By this time, unfortunately, the beetles have already infected the tree with deadly fungus. To ward off the beetles, Norris is now working...
...parallel attack on elm disease, the U.S. Department of Agriculture intends to cross the disease-prone American elm with the hardy Siberian variety. Even if the hybrid is a success, elm lovers are not likely to be pleased. The new tree clearly lacks the grace of its American parent. "It has a single, central trunk rather than our beautiful vaselike division," says Hansel. "Who will want a tree that looks more like a maple than an elm...