Guy Davies, an inspector for the Florida Division of Plant Industry, on Monday checks an orange tree for the Asian citrus psyllid, an insect that carries the bacterium which causes the disease known as citrus greening, or “huanglongbing,” from tree to tree in Fort Pierce, Florida. Davis is part of a team trying to track the movement of the insect. There is no known cure for the disease, which spreads when the insect deposits the bacterium on citrus trees, causing the leaves on the tree to turn yellow, the roots to decay and bitter fruit to fall off the dying branches prematurely.May 15, 2013
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