Plant diseases
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Bug hunter Caption: "Bug hunter--Karl M. Maramorosch, research fellow at the Brooklyn Botanic Garden, raises the celluloid cage under which insects have been feeding... |
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The insect house Caption: "The insect house--Those infected clover plants under their individual canopies with gauze tops and tufts of absorbent cotton plugging... |
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Work of a virus Caption: "Work of a virus--Here on the stem and branches of a sweet clover plant are tumors of the Clover Big Vein disease caused by a virus first... |
