Oecologia

, Volume 99, Issue 3–4, pp 366–373 | Cite as

Cold hardiness and overwintering strategy of the pink maize stalk borer,Sesamia nonagrioides Lef (lepidoptera, noctuidae)

  • N. Gillyboeuf
  • P. Anglade
  • L. Lavenseau
  • L. Peypelut
Original Paper

Abstract

The cold-hardening capacity of larvae of the pink maize stalk borer,Sesamia nonagrioides Lef., was examined. Supercooling points (SCPs) of field collected diapausing larvae from south-east and south-west France and non-diapausing and diapausing laboratory-reared larvae did not differ and ranged between −5 and −8°C. Thus, this insect possesses sufficient supercooling ability to avoid freezing over its normal environmental temperature ranges. Despite this, we found thatSesamia presents paradoxical cold reactions. Mortality of cold acclimated diapausing larvae after short-term exposure to temperatures above the SCP is high, supporting the view thatSesamia is cold-sensitive. On the other hand,Sesamia could survive freezing for at least 24 h to temperatures close to the SCP. This ability does not seem to be related to haemolymph trehalose, the sole cold-accumulated compound detected by gas chromatography and mass spectrometry. Despite the mildness of the winter 1990–1991, only 5% of the field population survive and pupate in April. The main part of the population died from November to January, the period during which larvae were mainly located in the part of the corn stem above the ground and experienced air temperatures. After January, all surviving larvae were excuusively located in the root, 10 cm below the soil, where they experienced milder temperatures than air. They exhibited a constant low rate of mortality, possibly independent of the cold. In their current distribution area, survival of overwintering larvae ofS. nonagrioides is only related to the microclimate of the overwintering site and freezing tolerance capacity seems to be irrelevant. This study allows us to propose a non-pollutant pest control method based on the “behavioral strategy” of this insect.

Key words

Sesamia nonagrioides Trehalose Overwintering site Freezing tolerance Pest control 

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Copyright information

© Springer Verlag 1994

Authors and Affiliations

  • N. Gillyboeuf
    • 1
  • P. Anglade
    • 2
  • L. Lavenseau
    • 1
  • L. Peypelut
    • 1
  1. 1.Laboratoire de Neuroendocrinologie de l'Insecte, URA CNRS 1138Université Bordeaux ITalence CedexFrance
  2. 2.Station de Zoologie INRAVillenave d'OrnonFrance

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