Short-term Storage of Adult Tamarixia radiata (Hymenoptera: Eulophidae) Prior to Field Releases for Biological Control of Asian Citrus Psyllid
Keywords:
diet, ectoparasitoid, honey, mass rear, parasitism rate, survival, temperatureAbstract
Tamarixia radiata is regarded as one of the Asian citrus psyllid’s most important natural enemies, and is thus currently being mass-reared and released by a number of laboratories in North America. It may not always be possible to immediately release newly-emerged adults, in which case it would be advantageous to store the parasitoids under optimal conditions until release. We found that newly-emerged adult T. radiata can be stored at 20 to 30 °C (14 h light photo phase) in vials containing honey with greater than 95% survival for up to 14 days. However, parasitoids stored for 14 days with honey at 25 °C parasitized fewer psyllid nymphs than newly emerged parasitoids. Thus, adult parasitoids can be stored, but they should be released as soon as possible for maximal parasitism.
Tamarixia radiata es considerado como uno de los principales enemigos naturales del psilido asiatico de los citricos, y es asi que actualmente se cria en masa y liberado por un numero de laboratorios en Norteamerica. No siempre es posible liberar inmediatamente los adultos recien emergidos, en cuyo caso seria ventajoso el almacenar los parasitoides en condiciones optimas hasta su liberacion. Encontramos que se puede almacenar de 20 a 30°C (fotoperiodo de luz de 14 horas) los adultos de T. radiata recien emergidos en viales que contienen miel con una sobrevivencia de mas del 95% por 14 dias. Sin embargo, los parasitoides almacenados durante 14 dias con la miel a 25° C parasitaban menos niinfas de psilidos que los parasitoides recien emergidos. Por lo tanto, se puede almacenar los parasitoides adultos, pero deben ser liberados tan pronto como sea posible para un parasitismo maximo.
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