Phytosanitary Irradiation of Diaphorina citri (Hemiptera: Liviidae)

Guy J. Hallman, Deanna L. Chapa

Abstract


Asian citrus psyllid (Diaphorina citri Kuwayama; Hemiptera: Liviidae) adults reared on orange jasmine (Murraya paniculata (L.) Jack; Sapindales: Rutaceae) were evaluated for acute mortality and prevention of reproduction when adult insects were irradiated for phytosanitary purposes. At 2 kGy all adults (n = 60) were dead by 72 h post irradiation. A dose of 150 Gy did not prevent oviposition (n = 1,200 adults), but no nymphs were observed to emerge from the eggs. At the next lowest dose (100 Gy) some nymphs developed. These results indicate that a minimum PI treatment dose significantly greater than 1.5 kGy but less than 2 kGy is required for total mortality within 72 h and the minimum PI treatment dose to prevent egg hatch is greater than 100 Gy, but less than 150 Gy.

 

Resumen

Adultos del sílido asiático de los cítricos, Diaphorina citri Kuwayama Hemiptera: Liviidae), criados en jazmín naranja, Murraya paniculata (L.) Jack (Sapindales: Rutaceae), se evaluaron para mortalidad aguda y la prevención de la reproducción después de irradiación con fines fitosanitarios. A los 2 kGy, todos los adultos (n = 60) se murieron en 72 h. La dosis de 150 Gy no impidió la oviposición (n = 1.200 adultos), pero no se observó emergencia de ninfas de los huevos. En la siguiente dosis más baja (100 Gy) se desarrollaron algunas ninfas.


Keywords


citrus greening disease; huanglongbing; acute lethal dose; prevent disease transmission; radiotolerance; sterilizing dose

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