DB33/T 943.3-2014 Technical Specifications for Survey and Forecast of Major Maize Pests and Diseases Part 3: Maize Sheath Blight DB33/T943.3-2014 Standard compression package decompression password: www.bzxz.net
This part of DB33/T 943 stipulates the survey of maize sheath blight, the record of seedling conditions and farming activities, and the record of meteorological conditions. This part is applicable to the systematic survey and forecast of maize sheath blight.
DB33/T 943 "Technical Specifications for Survey and Forecast of Major Maize Pests and Diseases" is divided into the following 4 parts:
——Part 1: Maize Dwarf Disease;
——Part 2: Maize Large and Small Spot Diseases;
——Part 3: Maize Sheath Blight;
——Part 4: Maize Aphids.
This part is part 3 of DB33/T 943.
This part was drafted according to the rules given in GB/T 1.1-2009.
This part was proposed by the Zhejiang Provincial Department of Agriculture.
This part is under the jurisdiction of the Zhejiang Provincial Crop Standardization Technical Committee.
The drafting units of this part are: Zhejiang Provincial Plant Protection and Quarantine Bureau, Wenling Plant Protection Station, Yuhang District Agricultural Ecology and Plant Protection Management Station, Shangyu Agricultural Technology Extension Center, Zhejiang Dongyang Corn Research Institute. The
main drafters of this part are: Wang Huadi, Ye Jianren, Wang Aijuan, Han Hailiang, Cao Tingting, Xu Fasan, Wen Yutian, Zhang Yunfei.

ICS65.020
DB33/T943.32014
Technical specification for investigation and forecast on major maize pestsPart 3:Corn sheath blight
Published on 2014-10-27
Zhejiang Quality and Technical Supervision Bureau
Implemented on 2014-11-27
DB33/T943 "Technical specification for investigation and forecast on major maize pests" is divided into the following 4 parts: Part 1: Corn dwarf disease; Part 2: Corn large and small spot diseases; Part 3: Corn sheath blight; Part 4: Corn aphids. This part is Part 3 of DB33/T943. This part was drafted according to the rules given in GB/T1.1-2009. This part was proposed by the Zhejiang Provincial Department of Agriculture.
This part is under the jurisdiction of the Zhejiang Provincial Crop Standardization Technical Committee. DB33/T943.32014
The drafting units of this part: Zhejiang Provincial Plant Protection and Quarantine Bureau, Wenling Plant Protection Station, Yuhang District Agricultural Ecology and Plant Protection Management Station, Shangyu Agricultural Technology Extension Center, Zhejiang Dongyang Corn Research Institute. The main drafters of this part: Wang Huadi, Ye Jianren, Wang Aijuan, Han Hailiang, Cao Tingting, Xu Fasan, Wen Yutian, Zhang Yunfei, I
1 Scope
Technical specifications for the survey and investigation of major diseases and insect pests of corn Part 3: Corn sheath blight
DB33/T943.32014
This part of DB33/T943 stipulates the investigation of corn sheath blight, the record of seedling conditions and farming activities, and the record of meteorological conditions. This section applies to the systematic monitoring and investigation of corn sheath blight. 2 Disease investigation
2.1 Systematic field disease investigation
2.1.1 Investigation time
Investigation is carried out according to spring, summer, autumn corn or local main planting season corn. The investigation time is from seedling stage to filling stage, and the investigation is carried out once every 5 days. 2.1.2 Investigation method
Select 3 representative local corn fields, investigate 50 corn plants in each field, observe the corn disease situation, and grade the severity, see Appendix A, calculate the plant incidence rate and disease index, see Appendix B. The investigation results are recorded in Appendix C Table C.1 "Corn Sheath Blight Disease Investigation Record Form".
2.2 Field disease surveywww.bzxz.net
2.2.1 Investigation time
Investigate once or twice during the stable disease period of spring, summer, autumn corn or local main planting corn. 2.2.2 Survey method
Divide the fields into types according to corn type, variety and growth period, and investigate 3 fields for each type. The survey method is the same as 2.1.2. Calculate the plant incidence rate and disease index, see Appendix A and Appendix B, and record the results in Appendix C Table C.1 "Corn Sheath Blight Incidence Survey Record Table". 3 Seedling condition and agricultural activity records
According to the conventional recording standards for corn growth period, observe and record the main growth and development stages such as sowing period, transplanting period, jointing period, booting period, heading period, and filling period of spring, summer, and autumn corn or the main varieties of corn in the local main planting season, investigate the cultivation conditions such as sowing period, sowing amount, sowing density, and basic seedling number, investigate the different types of maturity, varieties and area ratios in the observation area, and the control of pesticides, etc. 4 Meteorological condition records
Observe and record meteorological conditions such as temperature, sunshine, and precipitation, analyze the relationship with the occurrence and epidemic of diseases, and record the observation results in Appendix C Table C.2 "Meteorological condition observation record table".
DB33/T943.32014
Appendix A
(Normative Appendix)
Grading Standard for the Severity of Corn Sheath Blight The severity of corn sheath blight is shown in Table A.1. Table A.1
No lesions on the leaf sheaths and leaves.
Grading of the Severity of Corn Sheath Blight
Spot Condition
There are lesions on the leaf sheaths, and the area of ​​lesions is less than 25% of the area of ​​the leaf sheaths. There are lesions on the leaf sheaths, and the area of ​​lesions accounts for 26% to 50% of the area of ​​the leaf sheaths. There are lesions on the leaf sheaths, and the area of ​​lesions accounts for 51% to 75% of the area of ​​the leaf sheaths. There are lesions on the leaf sheaths, and the area of ​​lesions exceeds 76% of the area of ​​the leaf sheaths, and the leaves below the ear are diseased. The leaf sheaths and bracts are diseased, and the plants are dead or close to death. B.1 Calculation of plant incidence
Plant incidence calculation formula:
Calculation of disease index
Disease index calculation formula:
Appendix B
(Normative Appendix)
Calculation of corn sheath blight incidence and disease index Plant incidence %=number of diseased plants
Number of surveyed plants
(Number of diseased plants × corresponding disease level)
)×100
Disease index=
Total number of surveyed plants × highest disease level
DB33/T943.32014
DB33/T943.32014
Appendix C
(Normative Appendix)
Data sheets for crop disease and insect pest survey
Corn sheath blight
Name of pest and disease monitoring station
(North Latitude
Monitor
Person in charge
Compiler: Zhejiang Provincial Plant Protection and Quarantine Bureau Seal
C.1 Survey record table of corn sheath blight incidence Survey record table of corn sheath blight incidence See Table C.1. Table c.1
Survey record table of corn sheath blight incidence Survey date
Infected plants
Severity classification
DB33/T943.32014
DB33/T943.32014
2 Meteorological observation record table
Meteorological observation record table See Table C.2.
Survey date
2 Meteorological observation record table
(hours)
Weather condition record
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