Continuous cropping obstacles (CCOs) refer to the phenomenon encountered when the same crop or its related species are continuously planted on the same plot, and even under normal management conditions, the yield and quality of products are still reduced, and the diseases and insect pests become serious. Continuous cropping obstacles (CCOs) refer to the phenomenon encountered when the same crop or its related species are continuously planted on the same plot, and even under normal management conditions, the yield and quality of products are still reduced, and the diseases and insect pests become serious. Ecology Agriculture Phys.org – latest science and technology news stories