DAVIS--Most people have never seen the walnut twig beetle, a tiny insect that spreads a fungal pathogen that kills walnut trees.
No wonder. The insect, measuring about 1.5 millimeters long, is much smaller than a grain of rice.
DAVIS--Most people have never seen the walnut twig beetle, a tiny insect that spreads a fungal pathogen that kills walnut trees.
No wonder. The insect, measuring about 1.5 millimeters long, is much smaller than a grain of rice.
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