Prevention method for predicting and forecasting potato blight of medium resistant variety

A potato late blight and potato technology, applied in the field of prediction and forecasting of potato late blight, can solve the problems of excessive application of pesticides, not strong, blind application of different resistant varieties, forecasting and forecasting, and achieve the effect of improving control efficiency

Inactive Publication Date: 2017-05-31
黑龙江省农业科学院植物脱毒苗木研究所
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Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of excessive application and blind application of pesticides in the existing potato late blight disease control process and the problem that the prediction and forecast of different resistant varieties existing in the late blight control process is not strong, and provide a Methods of Prediction and Control of Potato Late Blight of Moderately Resistant Varieties

Method used

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  • Prevention method for predicting and forecasting potato blight of medium resistant variety
  • Prevention method for predicting and forecasting potato blight of medium resistant variety
  • Prevention method for predicting and forecasting potato blight of medium resistant variety

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specific Embodiment approach 1

[0015] Specific embodiment one: the method for preventing and treating the potato late blight prediction and forecasting of resistant varieties in the present embodiment is carried out in the following steps:

[0016] 1. Take medium-resistant potato as the target seed potato, control the relative humidity of the environment ≥ 90% as the wet period, and establish a prediction model for different infestation degrees based on the average temperature of the environment every day and the duration of the wet period, and obtain the mild infestation. Dyed model curve is y=-0.048x 2 -0.247x+16.74, the area surrounded by the x-axis and y-axis below the light infestation model curve is the non-infestation area, and the moderate infestation model curve is y=-0.031x 2 +0.051x+20.56, the area between the moderate infestation model curve and the light infestation model curve is the light infestation area, and the severe infestation model curve is y=-0.004x 2 -0.686x+28.20, the area between ...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the medium-resistant potato variety described in Step 1 is Kexin 13, Zao Dabai or Eugene 885. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that step 1 controls the average temperature within a range of 7-30°C. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a prevention method for predicting and forecasting potato blight of medium resistant variety, and belongs to the field of plant protection. The invention aims at solving the defects of excessive pesticide application and blind pesticide application in the existing potato blight control process and the problem of low pertinency of prediction and forecast of different resistant varieties in the potato blight control process. The prevention method comprises the following steps: 1, separately establishing model curves of mild infection, moderate infection, severe infection of infection and extreme infection; 2, establishing scores of different average temperature disease development; 3, establishing a field weather station, and collecting real-time meteorological data after germination of potatoes; and 4, substituting the meteorological data in a prediction model to analyze the potential occurrence degree of the disease, if the infection conditions exist, accumulating scores obtained every day, and spraying pesticide for prevention when sigma (Si) = 7-8. By adoption of the prevention method provided by the invention, the specific occurrence time, the development trend and the optimal prevention time of the potato blight can be clarified, scientific pesticide spray is carried out to reduce the pesticide spray times, and the prevention efficiency of the potato blight of the medium resistant variety is improved.

Description

technical field [0001] The invention belongs to the field of plant protection, and in particular relates to a method for preventing and forecasting potato late blight of moderately resistant varieties. Background technique [0002] Late blight caused by Phytophthora infestans (Mont.) de Bary is currently the most serious disease that harms potato production. It has a high epidemic rate and is difficult to control. In general years, it can cause a 30% to 50% reduction in production, or even extinction in severe cases, seriously restricting the development of my country's potato industry. Chemical control has always been the most effective and easiest way to control potato late blight. However, in the process of disease prevention and control, problems such as untimely application of drugs and abuse of pesticides generally exist, which lead to a series of problems such as drug residues, environmental pollution, and secondary diseases. Therefore, disease prediction and early ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 闵凡祥吕典秋高云飞杨帅董学志魏琪王文重张静华胡林双李辉张君
Owner 黑龙江省农业科学院植物脱毒苗木研究所
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