The Asian citrus psyllid is currently the top pest threat in the California and Arizona citrus industries. The psyllid vectors Huanglongbing, the worst citrus tree disease in the world. An adult psyllid (pictured) without HLB must feed on an HLB-infected tree for many days before infection with bacterium can occur.
Psyllid nymphs developing on HLB-infected trees can acquire the disease just before reaching the adult stage and can immediately transmit the disease to uninfected trees, USDA says.
Glenn Wright, University of Arizona citrus specialist, is very concerned about the potential spread of HLB from Mexico into the United States.
Researchers check yellow sticky traps for the Asian citrus psyllid in a backyard citrus tree.
Western Farm Press
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