The effect of diapause, cold acclimation and ice-nucleating bacteria on the coldhardiness of <i>Plodia interpunctella</i>.
DOI:
https://doi.org/10.5073/jka.2010.425.167.346Abstract
Laboratory tests showed that over 50 d at 0°C, over 10 d at -5°C or 1 d at -10°C were required to control non cold-acclimated 5th instar larvae of Plodia interpunctella (Lepidoptera: Prylidae) (Indian meal moth). To control the most cold-hardy stage, diapausing cold-acclimated 5th instar larvae over 14 d at -10°C or 1 d at - 15°C were required. A freeze-out of a single floor of a seed warehouse was carried out from 23 December 1993 until 2 January 1994 by shutting off the heat and opening the windows. The lowest temperatures achieved varied with the size and location of the seed bulk. Seed packets, that had a few grams of seed, reached -17°C, whereas, the middle of a bag stack with forty 50-kg bags of maize only reached -9°C. By the end of the 10-d freeze-out all non cold-acclimated P. interpunctella larvae were killed in the packets, 90% of the diapausing cold-acclimated larvae were killed in a single bag and 65% were killed middle of the stack. Mortality in the freeze-out was higher than we would have predicted from the laboratory data. The supercooling points (temperature at which freezing begins) of the P. interpunctella larvae range from -7°C for the non-diapausing non-acclimated to -13°C for the diapausing acclimated.Keywords: Indian meal moth, Warehouse, Larvae, Supercooling point
Downloads
Veröffentlicht
2010-09-02
Ausgabe
Rubrik
Section: Non-Chemical Control
Lizenz
Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz.
Sie dürfen:
- Teilen — das Material in jedwedem Format oder Medium vervielfältigen und weiterverbreiten
- Bearbeiten — das Material remixen, verändern und darauf aufbauen und zwar für beliebige Zwecke
Unter folgenden Bedingungen:
-
Namensnennung — Sie müssen die Namen der Autoren und den Titel des Werkes angeben, einen Link zur Lizenz beifügen und anmerken, ob Änderungen vorgenommen wurden.
- Keine weiteren Einschränkungen — Sie dürfen keine zusätzlichen Klauseln oder technische Verfahren einsetzen, die anderen rechtlich irgendetwas untersagen, was die Lizenz erlaubt.