SURVIVAL OF DIAPHORINA CITRI (HOMOPTERA: PSYLLIDAE), AND ITS TWO PARASITOIDS, TAMARIXIA RADIATA (HYMENOPTERA: EULOPHIDAE) AND DIAPHORENCYRTUS ALIGARHENSIS (HYMENOPTERA: ENCYRTIDAE), UNDER DIFFERENT…

By C. McFarland, M. Hoy. 2001

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The ability of an exotic citrus pest, Diaphorina citri Kuwayama, and its two parasitoids, Tamarixia radiata (Waterston) and Diaphorencyrtus aligarhensis (Shafee, Alam & Agarwal), to survive under different relative humidities (7%, 33%, 53%, 75% and 97%) at 25 and 30°C was compared. The data obtained may help to predict potential climatic limitations to their establishment in Florida and indicate whether the pest has different climatic tolerances compared to these parasitoid populations. Adult survival was evaluated under relative humidities maintained by saturated salt solutions. D. citri survived longer than the parasitoid populations at all experimental conditions, suggesting it has a lower net water loss rate. The T. radiata (Taiwan) population showed the greatest moisture requirement at all temperatures and relative humidities tested. The T. radiata (Vietnam) population survived longer than the Taiwan, suggesting that the two populations may perform differently in different geographical regions. D. aligarhensis and T. radiata (Vietnam) survived similar lengths of time, except at the higher relative humidities, so the moisture requirements for these two populations are comparable.

Subfields: Insect Science, Plant Science

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Citations in the corpus

ASIAN CITRUS PSYLLIDS (STERNORRHYNCHA: PSYLLIDAE) AND GREENING DISEASE OF CITRUS: A LITERATURE REVIEW AND ASSESSMENT OF RISK IN FLORIDA (2004, background): “Both T. radiata and D. aligarhensis were released into Florida (McFarland & Hoy 2001), but with mixed results.”
Asian citrus psyllid, Diaphorina citri, vector of citrus huanglongbing disease (2013, background): “Female T. radiata attack third through fifth instars of ACP (Figure 2B; McFarland & Hoy, 2001; Skelley & Hoy, 2004).”
Behavioral evidence for a female‐produced sex attractant in Diaphorina citri (2008, background): “Excessive use of pesticides poses several potential problems, including increased development of physiological resistance in the target pest and reduction in populations of natural enemies that may otherwise contribute to control of D. citri (McFarland & Hoy, 2001; Michaud, 2002a,b, 2004).”
SEASONAL ABUNDANCE OF THE ASIAN CITRUS PSYLLID, DIAPHORINA CITRI (HOMOPTERA: PSYLLIDAE) IN SOUTHERN FLORIDA (2002, background): “Since the discovery of D. citri in south Florida, the biology of this psyllid and associated parasitoids including Tamarixia radiata (Waterston) and Diaphorencyrtus aligarhensis (Shafee, Alam & Agarwal) have been studied in Florida laboratories (Tsai & Liu 2000, Liu & Tsai 2000, McFarland and Hoy 20”
Biology and management of Asian citrus psyllid, vector of the huanglongbing pathogens. (2013, background): “Although moisture requirements for the two species are comparable (87), infection with Wolbachia has been cited as a possible explanation for the difficulty of establishing D.”
A synchronous rearing method for the Asian citrus psyllid and its parasitoids in quarantine (2004, background): “Because the T. radiata colonies from Taiwan and Vietnam respond differently to temperature and humidity (McFarland and Hoy, 2001), we wanted to release them separately.”