Solid-Stemmed Wheat Does Not Affect Overwintering Mortality of the Wheat Stem Sawfly,Cephus cinctus
| Autor: | Brian L. Beres, Héctor A. Cárcamo, Sean McGinne, Hugh McLean, Carolyn E. Herle |
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| Rok vydání: | 2011 |
| Předmět: |
Acclimatization
Population cold-hardiness Hymenoptera Article Host-Parasite Interactions Animals Cultivar novel solid wheat germplasm Cephidae education Triticum Overwintering Larva education.field_of_study winter survivorship biology fungi food and beverages supercooling General Medicine biology.organism_classification Cold Temperature Sawfly wheat stem sawfly Agronomy Insect Science Female Seasons PEST analysis |
| Zdroj: | Journal of Insect Science |
| ISSN: | 1536-2442 |
| Popis: | The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), is a key pest of wheat in the northern Great Plains of North America. Host plant resistance in the form of solid-stemmed wheat cultivars is the main control strategy for C. cinctus. This study investigated the effect of novel and traditional solid wheat hosts on the overwintering mortality and cold-hardiness of C. cinctus. Field conditions from 2003–2005 showed that overwintering mortality in various wheat cultivars averaged 8% and was not related to the type of wheat cultivar. Similarly, supercooling points (-22° C) were not influenced by wheat host type. C. cintus are cold-hardy; up to 80% survive 10 days at -20° C and 10% survive 40 days. Its overwintering microhabitat near the crown area of the plant is well insulated for temperatures above -10° C and remains ∼ 20° C above ambient minima. These data suggest that winter mortality is a minor factor in the population dynamics of wheat stem sawfly, and despite clear detrimental effects on larval weight and adult fitness, solid-stemmed cultivars do not reduce the ability of larvae to survive winters. |
| Databáze: | OpenAIRE |
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