Publication Type: | Journal Article |
: | 2011 |
Authors: | C. G. Martin, Mannion, C., Schaffer, B. |
Journal: | Florida Entomologist |
Volume: | 94 |
Pagination: | 279-289 |
Date Published: | Jun |
: | 0015-4040 |
: | Diaprepes abbreviatus |
: | Effects of flooding and herbivory by Diaprepes abbreviatus L. (Coleoptera: Curculionidae) larvae on leaf gas exchange (net CO2 assimilation (A), transpiration (E), and stomatal conductance (gs)) and growth of green buttonwood (Conocarpus erectus L.) and Swingle citrumelo (Poncirus trifoliata (L.) Raf. x Citrus paradisi Macf.) trees were tested. Growth and survival of the larvae were also examined. For each plant species, there were 2 larval infestation treatments (infested and non-infested) and 2 flooding treatments (flooded and non-flooded). Beginning 6 d after larval infestation, plants were flooded in three 1-wk cycles each with 2 d of flooding followed by 5 d of non-flooding. For green buttonwood, E was higher for non-flooded than flooded plants on the third of 5 measurement dates and A and gs were higher for non-flooded than flooded plants on the fifth (final) measurement date. For Swingle citrumelo, E and gs were higher for non-infested than infested plants on the fifth (final) measurement date. Root dry weight of Swingle citrumelo was higher for flooded, infested than for non-flooded, infested plants and for non-flooded, non-infested than for non-flooded, infested plants. Larval survival rate, head capsule width, and root damage rating of Swingle citrumelo were lower for flooded than for non-flooded plants, whereas flooding did not affect larval survival or growth on green buttonwood. Thus, short-term cyclical flooding of three 2-d cycles may control D. abbreviatus larvae on Swingle citrumelo but did not control larval populations or reduce damage on green buttonwood. |
LEAF GAS EXCHANGE AND GROWTH RESPONSES OF GREEN BUTTONWOOD AND SWINGLE CITRUMELO TO DIAPREPES ABBREVIATUS (COLEOPTERA: CURCULIONIDAE) LARVAL FEEDING AND FLOODING
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