2Analysis on Situation Facing in Citrus Fruit Fly Prevention and Control and Its CountermeasuresZhang Qiudong, Sun Jinsong, Luo Hangang10-11
3Observation on Overwintering Pupae Eclosion of Citrus Fruit Fly in Initial Stage and Its Trap and Kill Tests12-12
4Occurrence Characteristics and Integrated Control Technique of Ponkan Acute Anthracnose in the Han River Valley13-14
6Weeding Effect Comparation Between 2 Soil Treatment Agents in Winter Transplanting Rape FieldsChang Xiangqian, Chu Shihai, Li Ruhai18-19
8Control Trials of Potato Late Blight with Different Chemicals Reduced Application in Winter Planting Potato Field27-29