Field survey of Asian citrus psyllid (Hemiptera: Liviidae) infestations associated with six cultivars of Poncirus trifoliata (Rutaceae)
Keywords:
citrus greening, huanglongbing, Diaphorina citri, LiberibacterAbstract
Summary
The Asian citrus psyllid (Hemiptera: Liviidae) transmits a bacterium responsible for huanglongbing, a serious citrus disease. Insecticidal control of the psyllid is a key tactic used to manage the disease, but host plant resistance may hold some promise and clues in the search for alternative tactics. Results of a field survey revealed that relatively large infestation densities of the psyllid developed on conventional Citrus (Rutaceae) and citrange (Rutaceae) cultivars but not on any of 6 Poncirus trifoliata (L.) Raf. (Rutaceae) cultivars. Poncirus trifoliata is a species closely related to Citrus, and citranges are hybrids of sweet orange and P. trifoliata. Reduced colonization by the psyllid on P. trifoliate was largely a result of reduced rates of oviposition. Poncirus trifoliate resistance to oviposition was not observed in 4 citrange cultivars.
Sumario
El psílido asiático de los cítricos (Hemiptera: Liviidae) transmite la bacteria responsable del huanglongbing, una enfermedad seria de los citricos. El control químico del psílido es una táctica clave utilizada para manejar la enfermedad, pero la resistencia de la planta hospedera puede ser prometedora y dar una pista en la búsqueda de tácticas alternativas. Los resultados de un sondeo del campo revelaron densidades de infestación relativamente grandes del psilido desarrollandose en cultivares convencionales de Citrus (Rutaceae) y citrange (Rutaceae), pero no sobre ninguno de los 6 cultivares de Poncirus trifoliata (L.) Raf. (Rutaceae). Poncirus trifoliata es una especie estrechamente relacionada con Citrus y las citranges son híbridos de naranja dulce y P. trifoliata. La reducción de la colonización por el psílido sobre P. trifoliate fue en gran parte resultado de una tasa de oviposición reducida. No se observó resistencia a la oviposición en Poncirus trifoliata en los 4 cultivares de citrange.
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