. Cooperative economic insect report. Beneficial insects; Insect pests. - 801 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES TWO-SPOTTED CITRUS PSYLLID (Spanioza erythreae (Del Guercio)) Economic Importance: The two-spotted citrus psyllid causes conspicuous pitting and curling of citrus leaves on the east coast of Africa, from Ethiopia south to the Cape. Serious damage to citrus nursery stock, particularly new growth, may occur. Nymphs cause pitting of the leaves by feeding on the underside of the foliage. Pitted leaves do not regain their shape after the insect leaves. In Ethiopia, serious
. Cooperative economic insect report. Beneficial insects; Insect pests. - 801 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES TWO-SPOTTED CITRUS PSYLLID (Spanioza erythreae (Del Guercio)) Economic Importance: The two-spotted citrus psyllid causes conspicuous pitting and curling of citrus leaves on the east coast of Africa, from Ethiopia south to the Cape. Serious damage to citrus nursery stock, particularly new growth, may occur. Nymphs cause pitting of the leaves by feeding on the underside of the foliage. Pitted leaves do not regain their shape after the insect leaves. In Ethiopia, serious damage to lemon was reported in 1961 and to orange in 1963. Distribution: East Africa, Ethiopia, South Africa, and Sudan. Hosts: Citrus and plants of the citrus Life History and Habits more noticeable when pi succulent shoots. Hate settle on the underside shallow pit unless dist are often mistaken for days in summer and 30 i appearance of the leave Adults fly rapidly and both nymphs and adults a severly infested tree The insect breeds all during the year; however, it is ants produce new growth. Adults deposit eggs only on hing occurs in 5-7 days in the summer and the small nymphs of leaves where they feed. Each individual remains in a urbed. Because nymphs are stationary on the leaves, they scale insects. The nymphal stage lasts on the average 20 n winter. There are five nymphal instars. The pocked s is the primary indication of the presence of the insects, are not easily captured on the foliage. Excrement from resembles tiny white eggs. The ground or vegetation under appears as though dusted with powder. Hemiptera:Psyllidae No. 168 of Series. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bure
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