Word: multistriatus
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ASMALLER number of biologists have also taken exception to the University's spraying program for the Dutch elm disease-a fungus infection imported from Europe. Two species of bark beetle known as Scolytus multistriatus and Hylurgopinus rufipes, inadvertently carry the fungal spores that cause the disease. B and G tries to control the beetles by spraying Harvard's clms in early April before the insects emerge from hibernation...
Named after the Dutch pathologist who first described it, the disease is caused by a fungus, Ceratostomella ulmi, which is introduced into the trees by an unattractive European elm bark beetle, Scolytus multistriatus. Toxins and gummosis produced by the fungus in the tree's water-conducting vessels may kill it in six months. Once disease is detected, death may be retarded, somewhat as in cancer, by removing more and more of the affected parts. Widespread use of preventative measures, such as burning old or dying trees to kill the beetles, or spraying and feeding the trees to discourage inhabitation, have...
...disease which wiped out practically every U. S. chestnut tree. Plant pathologists have found that elms are now being killed by a fungus, Graphium ulmi. The blight reached the U. S. in 1930 in some Carpathian elm logs shipped from Le Havre. It accompanies the beetle Scolytus multistriatus. This is a small, short-beaked beetle which nips the tender elm bark and shoots near the buds. Graphium ulmi enters the wounds. First external sign of the disease is the wilting and yellowing of leaves. Internally twigs become streaked with brown. The elm is doomed and must be drastically pruned...
...ZOOLOGICAL CLUB. "The Introduction of a European Bark-beetle, Scolytus Multistriatus, into Massachusetts." Mr. J. W. Chapman. Zoological Laboratory, 4th floor, Room...
...ZOOLOGICAL CLUB. "The Introduction of a European Bark-beetle, Scolytus Multistriatus, into Massachusetts." Mr. J. W. Chapman. Zoological Laboratory, 4th floor, Room...