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

[摘要] ENGLISH ABSTRACT: Catches of male codling moth, Cydia pomonella (L.), using 400 pheromone-baited sticky traps in 200orchards in the Langkloof during 1992 - 1995 were associated with four geographically distinct areas. Thesewere Misgund in the west, Nuweplaas, Louterwater and Joubertina in the east. Within each area cool andwarm slopes as well as dry and moist areas were identified. In Joubertina, the area with the lowest averagealtitude, high numbers of moths were caught in dry, cool areas. High moth catches were associated withwarm, 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. In· view of the variability of thedata there does not appear to be much scope for reducing the number micro climates in which representativetraps are placed.

[发布机构] Stellenbosch University