Phytosanitary irradiation of Diaphorina citri (Hemiptera: Liviidae) on Citrus × aurantium (Sapindales: Rutaceae)
Keywords:
Asian citrus psyllid, citrus greening disease, huanglongbing, Citrus reticulata, ‘Kinnow’, prevent disease transmission, radiotolerance, acute lethal dose, sterilizing doseAbstract
Eggs, nymphs, and adults of the Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae)—vector of citrus greening disease—were exposed to a series of gamma irradiation doses and examined for post irradiation development to the next stage and mortality. A dose of 150 Gy was found to prevent egg hatching and 185 Gy was sufficient to stop further development of 1st and 2nd instar nymphs. The 3rd and 4th instar nymphs were more tolerant, and an estimated dose of 204 Gy prevented their further development. A dose of 864 Gy was estimated to be required for complete adult mortality within 3 d after irradiation, although the fit of the adult mortality data to the model was very poor.
Resumen
Los huevos, ninfas y adultos del psílido de los cítricos, Diaphorina citri Kuwayama (Hemiptera: Liviidae)—vector de la enfermedad de enverdecimiento de los cítricos—fueron expuestos a una serie de dosis de irradiación gamma y luego examinados para su mortalidad después de la irradiación y su desarrollo al siguiente estadio. Se encontró que una dosis de 150 Gy previene la eclosión de los huevos y 185 Gy fue suficiente para detener un mayor desarrollo de la primera y segunda ninfas. Las ninfas del tercer y cuarto estadio fueron más tolerantes, y una dosis de 204 Gy se estimó para prevenir su desarrollo posterior. Una dosis de 864 Gy fue estimada para resultar en la mortalidad de todos los adultos dentro de 3 días, aunque el grado de ajuste de los datos de mortalidad de adultos en el modelo fue muy pobre.
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