2010 Florida Citrus Pest Management Guide: Asian Citrus Psyllid and Citrus Leafminer
Asian Citrus Psyllid
The Asian citrus psyllid (Diaphorina citri Kuwayama) has become the most important insect pest of Florida citrus due to the presence of citrus greening disease, which is spread by the psyllid. In other regions of the world where citrus is grown and greening disease is present, use of insecticides to control the psyllid vector has been a major component of greening management strategies. While no scientific data has been collected in these countries to demonstrate that insecticide use has indeed provided a benefit in terms of reducing or slowing the spread of greening disease, anecdotal evidence suggests that reducing psyllid populations via insecticide application does help to slow the rate of spread of the disease. However, it should be noted that elimination of the disease from an area has never been successful.
Adults of the citrus leafminer (Phyllocnistis citrella) are tiny moths that hide within the canopy during the day and emerge at night to lay eggs individually on young, expanding leaf flushes. The egg first appears as a tiny dew drop, usually alongside the midvein on the underside of an unexpanded leaf. The larva emerges directly into the leaf tissue, mining first along the midvein, then back and forth as it makes its way to the leaf margin where pupation occurs.