Cold tolerance and myo-inositol accumulation in overwintering adults of a lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae)

By Masahiko Watanabe. 2002

96 citations recorded by the source corpus.

I investigated the seasonal changes of cold tolerance and polyol content in adults of Harmonia axyridis to elucidate their overwintering strategy. Adults decreased their supercooling point and lower lethal temperature only during the winter. Although the seasonal trends for both values were almost consistent, there seemed to be considerable mortality, without being frozen, at -20°C in mid-winter. The pattern for seasonal change in tolerance at moderately low temperatures differed among the temperatures exposed: the survival time at -5°C peaked in winter, but the time at 5 or 0°C peaked in autumn. Because both autumn and winter adults were completely paralyzed only at -5°C and survived much longer at 0°C than at 5°C, the survival time at -5°C indicates the degree of chilling tolerance, whereas the time at 5 or 0°C seems to show starvation tolerance. This beetle accumulated a relatively large amount of myo-inositol during winter. Myo-inositol content synchronized seasonally with supercooling capacity, the lower lethal temperature and the chilling tolerance, suggesting that myo-inositol may play some role in the control of cold tolerance in this beetle.

Subfields: Ecology, Insect Science, Plant Science

View Paper: https://www.semanticscholar.org/paper/17089f94f89e1ea52d9860ccc5fcb1f954b34568

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In Ecology

1. P. Brown
2. Helen E. Roy
3. T. Sparks
4. R. Koch
5. Omkar
6. A. Pervez

In Insect Science

1. Helen E. Roy
2. P. Brown
3. A. Pervez
4. Omkar
5. R. Koch
6. T. Cottrell
7. T. Galvan
8. Joon-Ho Lee

In Plant Science

1. Helen E. Roy
2. Omkar
3. P. Brown
4. A. Pervez
5. T. Sparks
6. R. Koch
7. T. Galvan
8. T. Cottrell

Citations in the corpus

• The multicolored Asian lady beetle, Harmonia axyridis: A review of its biology, uses in biological control, and non-target impacts (2003, background): “Keywords: Harmonia axyridis, classical biological control, augmentative biological control, conservation biological control, non-target effects”
• Decline in native ladybirds in response to the arrival of Harmonia axyridis: early evidence from England (2011, background): “The latter scenario is suggested for H. axyridis in Japan, which is unpalatable to C. septempunctata (Yasuda et al., 2000).”
• Ecology and biological control application of multicoloured Asian ladybird, Harmonia axyridis: A review (2006, background): “The myo-inositol content is synchronized seasonally with supercooling capacity, lower lethal temperature and chilling tolerance, suggesting the importance of myo-inositol in cold tolerance (Watanabe 2002).”