Word: multistriatus
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Dates: during 1930-1939
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...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...