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Frontiers of Agricultural Science and Engineering >> 2014, Volume 1, Issue 3 doi: 10.15302/J-FASE-2014025

Modeling of the overwintering distribution of

1. College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China.2. National Agro-Tech Extension and Service Center, Ministry of Agriculture, Beijing 100125, China.3. China Animal Agriculture Association, Beijing 100028, China

Accepted: 2014-12-12 Available online: 2015-01-27

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Abstract

Wheat stripe rust caused by f. sp. occurs widely in China and seriously affects wheat production. Global warming could profoundly impact the incidence and prevalence of low-temperature diseases such as stripe rust. Studies on the effects of temperature on the distribution of overwintering stripe rust could help us understand the incidence and prevalence of the disease and could also provide support for monitoring, forecasting and developing control strategies. An exponential model and a spherical model of the ordinary Kriging method in the ArcGIS platform were used to predict the overwintering regions of stripe rust based on the probability that the average temperature of the coldest month from December to February was higher than -6 or -7°C from 2001 to 2012. The results showed that the areas with a probability between 70% and 90% were transition regions for the overwintering of stripe rust. Based on annual mean temperature of the coldest month from December to February for 2001 to 2012, overwintering distribution of stripe rust was likewise evaluated. The boundary for overwintering of stripe rust was consistent with the areas where the probability was predicted to be 70% to 90% for the overwintering distribution of stripe rust, but the boundary was shifted northward toward Beijing in North China. Some areas in Xinjiang, including Akto, Pishan, Hotan and Yutian, were also predicted to be suitable for the overwintering of stripe rust.

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