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Early warning model for cucumber downy mildew in unheated greenhouses

文献类型: 外文期刊

作者: Yang, Xinting 1 ; Li, Ming 2 ; Zhao, Chunhang 2 ; Zhang, Zheng 2 ; Hou, Yanlin 3 ;

作者机构: 1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

2.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

关键词: cucumber downy mildew; early warning model; greenhouse; good agricultural practice (GAP); risk analysis

期刊名称:NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH ( 影响因子:2.161; 五年影响因子:1.988 )

ISSN: 0028-8233

年卷期: 2007 年 50 卷 5 期

页码:

收录情况: SCI

摘要: An early warning model for occurrence of cucumber downy mildew in non-heated greenhouses was developed based on disease records and microclimatic parameter analysis. It also integrated empirical and fundamental forecasting models, early warning theory and plant protection product risk analysis. The thresholds for infection were a daily temperature range 5'C, daily mean RH > 80% and daily mean temperature at 15-25'C in autumn. The temperature contribution rate for symptom appearance was measured by the reciprocal of the days of the inoculation period and the relationship was fitted by a polynomial of degree 3. Data recorded in two greenhouses were used to construct the model and its predictions were evaluated with an independent dataset. The warning source search, warning obviation and plant protection production risk analysis were based on China's Good Agricultural Practices (CHINAGAP). The implications of the variables and modules of the model in the safety production are discussed.

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