01757naa a2200169 a 450000100080000000500110000800800410001910000110006024500910007126000090016252012460017165300310141765300230144865300270147165300220149877300670152010841922012-03-29       2003    bl uuuu     u00u1 u    #d1 aEpagri  aFeeding and survival of citrus sharpshooters (HemipterabCicadellidae) on host plants.  c2003  aThe liquid excretion and surival of sharphooters Dilobopterus costalimai Young and Oncometopia facialis (Signoret), vectors of Xylella fastidiosa in citruis, were measured on various host plants as an indirect approach tos assess their feeding and performance on these hosts and determine suitable plants of laboratory rearing. Adult females of D. costalimai showed the higgest excretion rate on Vernonia condensata (Asteraceae). O. facilis excretede larger volumes on three especies of Vernonia and Lantana camara (Verbeneaceae). On average, single D. costalimai females excreted a l??quid to 292 times its body volume per day when feeding on V. consensata,whereas O. facialis females excreted 430 times their body volume on the same host. In contrast, the excretion rates of D. costalimai and O. facialis females on Citrus sinensis did not exceed 248 and 140 times their body volume per day, respectivvely. The mortality of adults after 96 h was lower on hosts upon which higher liquid volumes were excreted; therefore, there is a positive relationship between the excretion rate by the sharphooters and their nutritional adquacy to hosts. V. condensata is a suiteble host to mainain adult populations of both sharphooters in a laboratory.  aCitrus variegated clorosis  aHoneydew excretion  aHost plant suitability  aLeafhopper vector  tFlorida Entomologist, Fl??ridagv. 86, n. 2, p. 154-157, 2003.