Key periods and effects of meteorological factors affecting incidence of wheat black point in the Yellow and Huai wheat area of China. (November 2019)

• Record Type: Journal Article
• Authors: Li, Qiao-Yun; Wang, Si-Yu; Chang, Shou-Wei; Xu, Kai-Ge; Li, Meng-Yu; Xu, Qiao-Qiao; Jiang, Yu-Mei; Niu, Ji-Shan
• Is Part Of: Crop protection. Volume 125(2019)
• Publication Date: 2019-11
• Subjects: Wheat -- Black point -- Meteorological factors -- Key period; Plants, Protection of -- Periodicals; 632.05
• DOI: 10.1016/j.cropro.2019.104882
• Languages: English
• ISSNs: 0261-2194

Abstract

Abstract: To determine the key periods and effects of meteorological factors affecting the incidence of black point, the correlations between 14 meteorological variables and incidence of black point were analyzed using 23 susceptible wheat genotypes planted at three locations in two years in the Yellow and Huai Wheat Area of China. The results showed that the incidence of black point and meteorological factors varied considerably across locations and years. There was a significantly negative correlation between temperature-related variables (daily average temperature, days with temperature > 30 °C, etc.) and black point incidence at 26–40 days after heading. Humidity-related variables (daily relative humidity, rainfall days, etc.) except precipitation were positively correlated with black point incidence at 1–20 days after heading. When the daily average temperature decreased by 1 °C at 31–35 days after heading, the incidence of black point increased by approximately 5.5%, and when the daily relative humidity increased by 10% at 11–15 days after heading, the incidence increased by approximately 9.4%. There was a significant negative correlation between daily sunshine duration and black point incidence at 1–15 days and 26–40 days after heading. In conclusion, the key periods and meteorological factors affecting black point incidence are a humid environment at 1–15 days, lower temperature at 26–40 days, and a short period of sunshine after heading. These results provide important information for the control of black point in wheat. Graphical abstract: Image 1 Highlights: Using 23 representative genotypes susceptible or resistant to black point. Determine key periods and effects of meteorological factors affecting black point. Humidity variables affecting black point incidence mainly at 1–15 d after heading. Temperature variables affecting incidence mainly at 26–40 d after heading.