Patologias dos citrus: Diaphorina citri. Africana, asiática ou americana, vivem em rutaceas, no limão cravo e em murtas (Myrtaceae). Pode ser controlada por extrato da goiabeira (Psidium Guajava) (em estudo no Brasil).

http://en.wikipedia.org/wiki/Diaphorina_citri 

Diaphorina citri

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Diaphorina citri
Asian citrus psyllid, Diaphorina citri
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hemiptera
Suborder:	Sternorrhyncha
Superfamily:	Psylloidea
Family:	Psyllidae
Genus:	Diaphorina
Species:	D. citri
Binomial name
Diaphorina citri Kuwayama, 1908

The Asian citrus psyllid, Diaphorina citri, is a sap-sucking, hemipteran bug in the family, Psyllidae. It is an important pest of citrus, as it one of only two confirmed vectors of the serious citrus disease, Huanglongbing or greening disease.^[1] It is widely distributed in southern Asia and has spread to other citrus growing regions.

Contents 1 Distribution 2 Description 3 Life cycle 4 Damage 5 Control 6 References 7 External links

Distribution

The Asian citrus psyllid originated in Asia but it is now also found in parts of the Middle East, South and Central America, Mexico and the Caribbean. In the United States, this psyllid was first detected in Florida in 1998 and is now also found in Louisiana, Georgia and South Carolina.^[2] In Southern California, where it first appeared in backyard citrus in 2008, an eradication programme has been instituted in an attempt to prevent it becoming established.^[3][4] In the whole of the United States and its territories, areas where this psyllid are found are under quarantine restrictions.^[5]

Description

Adult D. citri

The adult psyllid is about four millimetres long with a fawn and brown mottled body and a light brown head. It is covered with a whitish, waxy secretion which makes it look dusty. The forewings are broadest at the back and have a dark edging around the periphery with a pale gap near the apex. The antennae are pale brown with black tips. These features distinguish it from the superficially similar African citrus psyllid. It typically adopts a head down, tail up posture as it sucks sap. Aphids are often also present on citrus and psyllids can be distinguished from them by being more active, jumping insects, whereas aphids are sedentery. In addition, the antennae of a psyllid has ten segments whereas those of aphids usually have four or six segments. Most aphids have cornicles on the abdomen and psyllids lack these.^[2]
The psyllid nymph moults five times. It is a yellowish-orange colour and has no abdominal spots. The wing pads are prominent, especially in the later instars.^[2]
The eggs are approximately 0.3 millimetres long, almond-shaped, thicker at the base and tapering toward the top. They are at first a pale colour but turn yellow and later orange before they hatch. The long axis is placed vertical to the surface of the leaf.^[2]