Method for controlling grey speck disease of corn by early planting of corn

A gray spot disease and corn technology, applied in the field of plant protection, can solve problems such as environmental pollution, loss of corn yield, poor control effect, etc., and achieve the effect of reducing the incidence rate, reducing the infection of pathogenic bacteria, and reducing the amount of application

Inactive Publication Date: 2009-05-20
YUNNAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

From July to August, corn is in the stage of earing and milk maturity (susceptible period), and the climatic conditions such as a large amount of precipitation and high temperature meet the occurrence and prevalence of corn gray spot disease. Therefore, corn gray spot disease has caused serious problems in production Severe losses in maize production
The control of corn gray spot mainly adopts chemical pesticide control, and chemical control not only has poor control effect, but also easily causes environmental pollution
There is no method to control corn gray spot by early sowing of corn

Method used

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  • Method for controlling grey speck disease of corn by early planting of corn
  • Method for controlling grey speck disease of corn by early planting of corn
  • Method for controlling grey speck disease of corn by early planting of corn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] In the comparative experiment in the same field, the control was sown according to the conventional sowing date of corn, sowing on April 20, and the sowing specifications were large and small rows, with small rows of 50 cm, large rows of 120 cm, and plant spacing of 25 cm. The treatment is early sowing of corn, sowing on January 10, planting in a single row, with a row spacing of 100 cm and a plant spacing of 25 cm. The variety of corn is Xundan 7. The incidence rate, disease index and control effect of maize gray spot were investigated, and the results are shown in Table 1.

[0009] Table 1 Effects of treatments and controls on controlling corn gray spot

[0010]

Embodiment 2

[0012] In the comparative experiment in the same field, the control was sown according to the conventional sowing date of corn, sowing on April 30, and the sowing specifications were large and small rows, with small rows of 50 cm, large rows of 120 cm, and plant spacing of 25 cm. Treatment is corn early sowing, sowing on January 25, single row planting, row spacing 110cm, plant spacing 25cm. The corn variety is Huidan 4. The incidence rate, disease index and control effect of maize gray spot were investigated, and the results are shown in Table 2.

[0013] Table 2 Effects of treatments and controls on controlling corn gray spot

[0014]

Embodiment 3

[0016] In the comparative experiment in the same field, the control was sown according to the conventional sowing date of corn, sowing on May 5, and the sowing specifications were large and small rows, with small rows of 50 cm, large rows of 120 cm, and plant spacing of 25 cm. Treatment is corn early sowing, sowing on February 10, single row planting, row spacing 120cm, plant spacing 25cm. The corn variety is Gengyuan 135. The incidence rate, disease index and control effect of maize gray spot were investigated, and the results are shown in Table 3.

[0017] Table 3 Effects of treatments and controls on controlling corn gray spot

[0018]

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Abstract

The invention relates to a method for controlling a corn gray speck disease through corn early sowing, which belongs to the field of plant protection. The method comprises a technical proposal that the conventional corn sowing mode, the fertilization level and the field management method are kept unchanged; the difference is to sow corn early; and corn is sowed from January to February and is harvested from May to June. Corn is planted in a single row with the row spacing of 100 to 120cm; and 2,000 to 3,000 corn stocks are sowed for every mu. The method can also be applied to sugarcane, vegetable, orchard and mulberry fields. The method can effectively give play to the advantages of corn early sowing and harvesting, avoid the weather conditions favorable for the occurrence and popularity of the corn gray speck disease concerning time, effectively control the hazard of the corn gray speck disease, and simultaneously reduce the dosage of chemical pesticides and the adverse effect of the chemical pesticides on the ecological environmental pollution of farmland.

Description

Technical field: [0001] The invention relates to a method for controlling corn gray spot by early sowing of corn, and belongs to the field of plant protection. Background technique: [0002] Maize gray spot, also known as cercospora leaf spot, is a worldwide disease. In 1991, maize gray spot disease occurred in Dandong, Zhuanghe and other places in Liaoning. In 1996, the diseased area in Liaoning Province reached more than 200,000 hectares, and more than 200 million kilograms of corn were lost. The disease is more serious in the coastal areas, and the yield reduction reaches more than 50%. In Yunnan Province, corn gray spot disease also occurs and is prevalent seriously. In 2007, Gejiu corn gray spot disease occurred in an area of ​​28,000 mu, resulting in the failure of corn harvest in most mountainous areas. In Wenshan Prefecture, Yuxi District, Baoshan District, etc. in Yunnan Province, maize gray spot disease has occurred and prevailed. Climatic conditions have a sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
Inventor 杨静朱有勇李成云何霞红王海宁朱书生李炎谢勇孙雁刘林纪韵祚
Owner YUNNAN AGRICULTURAL UNIVERSITY
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