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Application of wheat gibberellic disease by wet weather forecast

A wheat scab, weather forecast technology, applied in the application, botany equipment and methods, horticulture and other directions, can solve problems such as the impact of forecast accuracy, achieve the effect of accurate forecast, reduce disease losses, and increase economic benefits

Inactive Publication Date: 2009-07-01
冯成玉
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Problems solved by technology

Therefore, most researches on the forecasting of wheat scab focus on the climate prediction of wheat heading and flowering period, and the research results are mostly fuzzy analysis or qualitative return on the past. As for the qualitative forecasting of future trend of scab It is also inseparable from citing weather forecasts, the accuracy of which is often affected by weather forecasts

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  • Application of wheat gibberellic disease by wet weather forecast

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Embodiment Construction

[0024] A method for forecasting wheat head blight by using wet weather. When wet weather occurs during the wheat growth period, the relative humidity of the air is measured at 2, 8, 12, and 20 o'clock every day, and the 2, 8, and 20 The relative air humidity at 14:00 reached 85% or more, and at 14:00 reached 82% or more for more than 30 hours, and the average temperature during this period was above 12°C, which means that wheat scab will occur; The growth period of wheat refers to the period within 5 days from 50% of wheat heading to 80% of flowering.

[0025] Quantitative prediction of wheat scab according to the following calculation formula:

[0026] Y=0.1044X 1 +8.0751×(X 2 -10) 1 / 2 +18.0432X 3 -19.7998

[0027] In the formula: Y: Disease ear rate (%)

[0028] x 1 : cumulative duration of wet weather

[0029] x 2 : Average temperature during the duration of wet weather (°C)

[0030] x 3 : The ratio of the number of precipitation hours ≥ 0.1mm i...

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Abstract

The invention discloses a method for forecasting wheat scab by using the wet weather. When the wet weather occurs during the wheat growth period, the relative humidity of the air is measured at 2, 8, 12 and 20 o'clock every day, and the 2 If the relative air humidity reaches 85% or more at 8 and 20 o'clock, or 82% or more at 14 o'clock, and lasts for more than 30 hours, and the average temperature during this period is above 12°C, it is predicted that wheat redness will occur. mildew. The present invention has a prediction error of disease ear rate of 0.29-5.2%.

Description

Technical field: [0001] The invention relates to a method for forecasting occurrence of crop scab. Background technique: [0002] Wheat head blight is a common disease that occurs in the middle and lower reaches of the Yangtze River. Its incidence and prevalence are mainly affected by three factors: one is the base of the pathogen, the other is the growth period of wheat, and the third is the meteorological conditions. Although the occurrence and prevalence of scab are the result of the joint action of many factors, it has been verified by practice that the main factor of its prevalence in each year is meteorological conditions. [0003] Existing studies believe that the prediction of wheat scab is a fuzzy problem, and the most closely related to the epidemic of wheat scab is the meteorological conditions of wheat heading and flowering period. Therefore, most researches on the forecasting of wheat scab focus on the climate prediction of wheat heading and flowering period, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00
Inventor 冯成玉张光旺凌和稳于宝富
Owner 冯成玉
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