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    Environmental conditions for Diaphorina citri Kuwayama (Hemiptera: Liviidae) take-off


    Tomaseto, A. F, and Miranda, M. P. and de Andrade Moral, Rafael and de Lara, I.A.R. and Fereres, A and Lopes, J. R. S. (2018) Environmental conditions for Diaphorina citri Kuwayama (Hemiptera: Liviidae) take-off. Journal of Applied Entomology, 142. pp. 104-113. ISSN 0931-2048

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    Abstract

    Environmental factors that influence flight activity of Diaphorina citri Kuwayama (Hemiptera: Liviidae) may have implications for Huanglongbing spread and management. In this work, four studies were conducted to evaluate the effect of environmental conditions on D. citri take-off. In the first, insects were transferred to sweet orange seedlings and confined inside an acrylic cage to verify the take-off periodicity and the effect of environmental factors on this process. In the second, take-off temperature threshold was estimated by recording the number of insects that initiated flight from a platform when subjected to gradual temperature increases from 15 to 39°C. In the other studies, we evaluated the effect of different photoperiods and temperature regimes (third study) and of constant temperatures (fourth study) on the propensity for D. citri flight. Insects were confined in clear plastic bottle cages with tubes of 50 ml placed on the cab, to collect emerged adults that initiated flights. Results showed that a small portion of the tested population (maximum 10%) tends to take off from plants and this behaviour is more prevalent in the afternoon (14:00–16:00 h), coinciding with daytimes of lower humidity and higher thermal amplitude. Adults that were submitted to lower temperatures (18°C) and short light periods (10 h) showed less propensity to flight. In contrast, at constant 27°C, the insects were more prone to flight, and this result was confirmed when individuals were submitted to increases in temperature, indicating that 27.14°C is the take-off temperature threshold of D. citri. Results show that temperature plays an important role in the flight activity of D. citri and suggest that control measures of the insect may be more effective in the morning and in temperatures below 27°C, when the probability to take off from a host is lower.

    Item Type: Article
    Keywords: Asian citrus psyllid; diel flight periodicity; flight propensity; huanglongbing; temperature;
    Academic Unit: Faculty of Science and Engineering > Mathematics and Statistics
    Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Item ID: 13259
    Identification Number: https://doi.org/10.1111/jen.12418
    Depositing User: IR Editor
    Date Deposited: 23 Sep 2020 11:31
    Journal or Publication Title: Journal of Applied Entomology
    Publisher: Wiley
    Refereed: Yes
    URI:

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