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Written Paper

Prediction of potential geographic distribution areas of the maize downy mildew in China by using MAXENT  [2009]

Zhao Wenjuan, Chinese Academy of Agricultural Sciences, Beijing(China), Institute of Plant Protection Chen Lin, Chinese Academy of Agricultural Sciences, Beijing(China), Institute of Plant Protection Ding Kejian, Anhui Agricultural University, Hefei(China), College of Plant Protection

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The maize downy mildew caused by Peronosclerospora maydis, P. sacchari, P. philippinensis, P. sorghi or Sclerophthora rayssiae var. zeae was important quarantine disease in maize. The potential risks of these pathogens in China were analyzed by using the software MAXENT. The results indicated that P. sorghi had the largest suitable areas among the 5 kinds of pathogens in China. Areas of moderate and high risk covered the North China Plain, middle and lower plain of Yangtze River, central northeastern regions of China, Guangxi Province and Guangdong Province, Fujian Province as well as western Yunnan Province. There are large areas of maize planted in these regions, which could provide available host for maize downy mildew colonization. It is therefore necessary to quarantine and monitor maize downy mildews for maize production in China.