Browsing by Author "Moehrke, Axel H."

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    Evaluation of the effect of microclimate differences on activity of codling moth, Cydia pomonella (Lepidoptera : Tortricidae), using pheromone trap capture data collected in apple and pear orchards in the Langkloof Region
    (Stellenbosch : Stellenbosch University, 1999-11) Moehrke, Axel H.; Pringle, K. L.; Stellenbosch University. Faculty of AgriSciences. Dept. of Conservation Ecology and Entomology.
    ENGLISH ABSTRACT: Catches of male codling moth, Cydia pomonella (L.), using 400 pheromone-baited sticky traps in 200 orchards in the Langkloof during 1992 - 1995 were associated with four geographically distinct areas. These were Misgund in the west, Nuweplaas, Louterwater and Joubertina in the east. Within each area cool and warm slopes as well as dry and moist areas were identified. In Joubertina, the area with the lowest average altitude, high numbers of moths were caught in dry, cool areas. High moth catches were associated with warm, dry microclimates at Nuweplaas and Louterwater, while the least number of moths was caught in cool, moist micro climates at Misgund, the area with the highest average altitude. InĀ· view of the variability of the data there does not appear to be much scope for reducing the number micro climates in which representative traps are placed.