PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Citrus greening disease research. Scientists examining an aerial infrared image of an infected citrus grove in Florida. Trees infected with the disease have been removed from the grove as shown by the white areas and gaps along the rows. By removing infected trees, the researchers hope to prevent the disease from spreading. Also known as huanglongbing, this disease causes mottled leaves and small, bitter fruits that remain partly green even when ripe. It is caused by bacteria transmitted by the Asian citrus psyllid (Diaphorina citri). There is no cure.
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