DIAPAUSE INDUCTION OF EGGS OF SIMULIUM ARCTICUM MALLOCH (IIS-10.11) (DIPTERA: SIMULIIDAE)

• Published in: The Canadian Entomologist
• Main Author: Shipp, J.L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1987
• Subjects: Insect Science; Molecular Biology; Physiology; Ecology, Evolution, Behavior and Systematics; Structural Biology; Athabasca River
• Online Access: http://dx.doi.org/10.4039/ent119497-5; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00046113

The Simulium arcticum Malloch sibling (IIS-10.11), which breeds in the Athabasca River (Procunier et al. 1984), is a major pest of cattle in central Alberta (Haufe and Croome 1980). Insecticide treatment of the river is the primary control method with the number of applications per season having increased from one to two treatments since 1978. The timing and number of applications per season are determined from information on larval instar and abundance, which is obtained from an extensive larval monitoring program that is conducted annually from late April to mid-September. Prediction of embryonic development and hatching rates of S . arcticum (IIS-10.11) eggs and when eggs enter diapause would provide for more accurate determination of the timing and number of treatments required each season.