TY - JOUR
T1 - Effects of constant and fluctuating temperatures on development of the coconut hispine beetle, Brontispa longissima (Coleoptera: Chrysomelidae) and two species of parasitoid
AU - Htwe, A. N.
AU - Murata, M.
AU - Takano, S.
AU - Nakamura, S.
N1 - Funding Information:
We sincerely thank Wiwat Suasa-ard, Sopon Uraichuen, Phueng Chomphukhia (National Biological Control Research Center, Kasetsart University, Bangkok, Thailand), and Amporn Winotai (Plant Protection Research and Development Office, Department of Agriculture, Bangkok, Thailand), and Dang Van Manh and Nguyen Le Lanh Da (Plant Protection Subdepartment, Tuy Hoa City-Phu Yen Province Vietnam) for providing the insects. We also thank Yuriko Akagi and Aki Konishi for technical assistance. We thank the two anonymous referees who made significant comments to improve the manuscript. This research was supported by a JIRCAS project (Development of Biological Control Against Invasive Insect Pests on Coconut Trees).
PY - 2013/5
Y1 - 2013/5
N2 - The larval parasitoid Asecodes hispinarum Bouček has been used to control the coconut hispine beetle, Brontispa longissima (Gestro) in Vietnam. Although A. hispinarum has succeeded in suppressing B. longissima in southern Vietnam, biocontrol has not succeeded in central Vietnam. One factor underlying this failure might be the high temperature during the hot season. In the present work, we examined whether A. hispinarum parasitises the beetles within the range of temperatures that occur during the hot season in central Vietnam and we evaluated the potential use of the pupal parasitoid Tetrastichus brontispae Ferrière. Development of the beetle and two parasitoids was investigated at two constant temperatures (28 and 30°C) and at fluctuating temperatures from 25 to 35°C (corresponding to temperatures during the hot season in central Vietnam). B. longissima reached adulthood in all the temperature treatments. More than 70% of A. hispinarum emerged from hosts at 28°C, but none emerged at 30°C or under fluctuating temperature conditions, indicating that A. hispinarum cannot be used as a biological control agent in central Vietnam. However, T. brontispae could reproduce the next generation at all temperatures. These results suggest that T. brontispae is a potential agent for continuous biological control of B. longissima in central Vietnam.
AB - The larval parasitoid Asecodes hispinarum Bouček has been used to control the coconut hispine beetle, Brontispa longissima (Gestro) in Vietnam. Although A. hispinarum has succeeded in suppressing B. longissima in southern Vietnam, biocontrol has not succeeded in central Vietnam. One factor underlying this failure might be the high temperature during the hot season. In the present work, we examined whether A. hispinarum parasitises the beetles within the range of temperatures that occur during the hot season in central Vietnam and we evaluated the potential use of the pupal parasitoid Tetrastichus brontispae Ferrière. Development of the beetle and two parasitoids was investigated at two constant temperatures (28 and 30°C) and at fluctuating temperatures from 25 to 35°C (corresponding to temperatures during the hot season in central Vietnam). B. longissima reached adulthood in all the temperature treatments. More than 70% of A. hispinarum emerged from hosts at 28°C, but none emerged at 30°C or under fluctuating temperature conditions, indicating that A. hispinarum cannot be used as a biological control agent in central Vietnam. However, T. brontispae could reproduce the next generation at all temperatures. These results suggest that T. brontispae is a potential agent for continuous biological control of B. longissima in central Vietnam.
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U2 - 10.1080/09583157.2013.788132
DO - 10.1080/09583157.2013.788132
M3 - Article
AN - SCOPUS:84877856626
SN - 0958-3157
VL - 23
SP - 574
EP - 583
JO - Biocontrol Science and Technology
JF - Biocontrol Science and Technology
IS - 5
ER -