Effect of Larval Density on Development of the Coconut Hispine Beetle,<i>Brontispa longissima</i>(Gestro) (Coleoptera: Chrysomelidae)

Murata, Mika; Dung, Dang Thi; Takano, Shigeru; Ichiki, Ryoko T.; Nakamura, Satoshi

doi:10.1155/2012/981475

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Larvae and adults were provided with fresh leaves of C. nucifera. Beetles were reared as described by Murata, Dung, Takano, Ichiki, and Nakamura (2012a).…”

Section: Materials and Methods Insectsmentioning

confidence: 99%

Effects of constant and fluctuating temperatures on development of the coconut hispine beetle,Brontispa longissima(Coleoptera: Chrysomelidae) and two species of parasitoid

Htwe

Murata

Takano

et al. 2013

Biocontrol Science and Technology

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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 308C) and at fluctuating temperatures from 25 to 358C (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 288C, but none emerged at 308C 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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“…Larvae and adults were provided with fresh leaves of C. nucifera. Beetles were reared as described by Murata, Dung, Takano, Ichiki, and Nakamura (2012a).…”

Section: Materials and Methods Insectsmentioning

confidence: 99%

Effects of constant and fluctuating temperatures on development of the coconut hispine beetle,Brontispa longissima(Coleoptera: Chrysomelidae) and two species of parasitoid

Htwe

Murata

Takano

et al. 2013

Biocontrol Science and Technology

View full text Add to dashboard Cite

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Larvae Crowding Increases Development Rate, Improves Disease Resistance, and Induces Expression of Antioxidant Enzymes and Heat Shock Proteins in Mythimna separata (Lepidoptera: Noctuidae)

Dai

Zhu

et al. 2021

Journal of Economic Entomology

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High population density (crowding) becomes a stress factor in insects. The oriental armyworm, Mythimna separata (Walker), displays gregarious and solitary phases at high and low population densities, respectively. In this study, we compared life history, disease resistance, and induction of antioxidant enzymes and heat shock protein (HSPs) in two phases of M. separata larvae. Results showed that gregarious larvae had a faster growth rate and lower pupal weight compared to solitary larvae. Furthermore, gregarious individuals exhibited higher survival rates than solitary individuals after Beauveria bassiana infection. The gregarious larvae had higher malondialdehyde content compared to solitary ones, but no differences in total antioxidant capacity were observed between the two larval phases before or after infection. Superoxide dismutase and glutathione peroxidase activities were significantly lower in gregarious M. separata larvae than solitary individuals before infection, but no difference was detected in two phases after infection. However, peroxidase and catalase activities in the two phases showed no difference either before or after infection. Hsp19.8 and Hsp90 expression in gregarious larvae were up-regulated when compared to solitary individuals before or after infection. CuZnSOD expression was not different between the two phases before infection, but it was up-regulated in gregarious ones compared to solitary ones after infection. However, expression of other stress-related genes in gregarious larvae was either repressed or unchanged when compared to solitary individuals before or after infection. Thus, larval crowding changed life history, improved disease resistance of M. separata larvae, and induced variable response of antioxidant enzymes and HSPs to fungal infection.

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Effect of Larval Density on Development of the Coconut Hispine Beetle,Brontispa longissima(Gestro) (Coleoptera: Chrysomelidae)

Cited by 2 publications

References 13 publications

Effects of constant and fluctuating temperatures on development of the coconut hispine beetle,Brontispa longissima(Coleoptera: Chrysomelidae) and two species of parasitoid

Effects of constant and fluctuating temperatures on development of the coconut hispine beetle,Brontispa longissima(Coleoptera: Chrysomelidae) and two species of parasitoid

Larvae Crowding Increases Development Rate, Improves Disease Resistance, and Induces Expression of Antioxidant Enzymes and Heat Shock Proteins in Mythimna separata (Lepidoptera: Noctuidae)

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