Differential effects of weather, plant phenology and predators on the seasonal variation of aphids on cabbage

The aphids Lipaphis erysimi pseudobrassicae (Davis) and Myzus persicae (Sulzer) pose serious threats to the production of cruciferous crops in tropics. Understanding their population dynamics is important for developing integrated pest management programmes minimize damage crops. This study investigated effects climatic factors, natural enemies plant age on these pests. density 20 cabbage plants, weather conditions were monitored five cropping seasons from 2019 2021 two agroecological zones Ghana (Coastal Savannah Deciduous Forest zones). highest L. e was recorded January (dry season) both zones, while M. occurred September (minor rainy August spell) Coastal respectively. aphid densities noted occur during periods with low relative humidity rainfall. e. significantly negatively related age, air temperature humidity, positively syrphids (Paragus borbonicus) spiders zone, it coccinellids. On other hand, coccinellids zone. Rainfall affected Coccinellids had a significant positive relationship provides insights into key factors that regulate will support development timely interventions manage