GB/T 15795-2026Technical specification for the monitoring and forecasting of wheat stripe rust (Puccinia striiformis) (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 15795-2011 "Technical Specification for Monitoring and Forecasting of Wheat Stripe Rust". Compared with GB/T 15795-2011, except for the structure... Aside from adjustments and editorial changes, the main technical changes are as follows:

a) The term and definition of "disease point rate" have been added (see 3.3);

b) Added classification or calculation methods for survey items (see Chapter 4);

c) The severity rating system has been simplified from 8 levels to 5 levels (see 4.2,

2.2 of the.2011 version);

d) The relevant content of the systemic investigation of the disease condition has been revised, and the systemic investigation time has been shortened (see Chapter 5, Chapter 4 of the.2011 edition);

e) The monitoring of aerial spore capture from invasive fungal sources has been removed (see

4.2 in the.2011 edition);

f) The term "disease survey" was changed to "disease dynamic survey" and related content was simplified, while a fixed-location survey was added (see Chapter 6,.2011). Chapter 5 of the edition);

g) The content related to the summering survey has been revised, and a survey of the alternate host barberry has been added (see

7.3 and Table B.5,

6.5 in the.2011 edition). Table A.5);

h) The severity grading criteria have been changed, and the lower limit for Level 1 occurrence has been adjusted (see Chapter 8, Chapter 3 of the.2011 edition);

1 Scope

GB/T 15795-2026 is the Chinese national standard covering tracking wheat stripe rust - a wind-borne disease that oversummers in the western highlands and sweeps east across the plain each spring, so the forecast in one province depends on the survey in another. China runs a national pest forecasting network, and standards like this one are what make a report from one county comparable with a report from another. The document fixes the survey design and timing, the sampling and counting, the records and the forecast issued from them. It replaces GB/T 15795-2011 and has been in force since 1 October 2026. It was issued on 31 March 2026 and takes effect on 1 October 2026, replacing GB/T 15795-2011. The document is under the responsibility of the Ministry of Agriculture and Rural Affairs. This page is published from the official record of the 2026 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

This document specifies the requirements for collecting and summarizing data on wheat stripe rust surveys, forecasts, and monitoring, and describes the corresponding verification methods. This document applies to the monitoring, surveying, and forecasting of wheat stripe rust.

5 Systematic investigation of the disease

5.1 Survey Location Select one to two fields with favorable conditions for disease development and a history of early onset of the disease as systematic survey fields, with each field having an area of not less than 333m2; the area of mountainous fields can be appropriately reduced. If disease-resistant varieties are commonly planted locally, pre-treatment should be conducted in areas with favorable disease-causing conditions and convenient observation. Plant susceptible varieties in blocks, establish observation nurseries, and systematically investigate fields or observation nurseries without using fungicides throughout the entire process.

6 Disease progression survey

6.1 Survey period When wheat stripe rust appears in the systematic survey field or observation nursery, the survey begins. If no disease is found in the systematic survey field or observation nursery, then... Surveys should begin at the jointing stage and be conducted every 7 days. During the peak of disease outbreaks, surveys can be conducted every 3-4 days. The final survey should be conducted at the waxy ripening stage. A final investigation is underway.

6.2 Survey Location Based on wheat cultivation zoning and annual disease incidence, several representative areas were selected. Within each representative area, susceptible varieties were selected for early sowing and appropriate sowing time. A survey of wheat-sown fields was conducted, covering no fewer than 20 fields in total.

7 Disease survey in summering areas

7.1 Survey period Depending on the summering region, the investigation is conducted in late August or during the peak disease season for summering hosts such as late-maturing spring wheat, winter wheat, and their own seedlings.

7.2 Survey Field Each year, following a fixed tour route, representative fields of disease-susceptible late-maturing spring and winter wheat varieties, as well as stubble fields and fallow fields where spontaneous wheat seedlings have grown, are selected. As survey fields. The number of survey fields shall be determined according to the actual area of each type of field, but the number of fields actually surveyed at each survey location shall not be less than [number missing]. 10 blocks, with a total area of no less than 5×667m2.

7.3 Survey Methodology For late-maturing spring and winter wheat survey fields, the incidence of stripe rust was estimated by visual inspection. For self-grown wheat seedling survey fields, a combination of field survey and detailed sampling was used for estimation. A combined method was used to estimate the density and disease status of volunteer wheat seedlings; the specific method is described in 6.3.1.The occurrence of barberry rust within a 100m radius of the wheat field was also assessed. The findings were investigated together (see Appendix C for symptoms of barberry rust), and the results were recorded in Table B.5.

8.Occurrence severity grading index The severity of wheat stripe rust was primarily indicated by the average disease index, with the disease incidence rate within the region serving as a reference. Severity was determined by... Table 1 classifies the indicators into 5 levels. mild occurrence (Level 1), moderate occurrence (Level 2), moderate occurrence (Level 3), severe occurrence (Level 4), and major occurrence (Level 5). Student (Level 5).

9 Prediction Methods

9.1 Ultra-long-term forecasting Based on the prevalence of autumn seedling diseases nationwide, the planting area of susceptible varieties, the temperature and snowfall conditions in the main overwintering areas, and the period from March to May of the following year... The meteorological forecast of rainfall, after consultation with experts and comprehensive analysis, will be completed by the end of the year to predict the prevalence of stripe rust in the following year.

9.2 Medium- and Long-Term Forecasts The county-level weekly wheat stripe rust report data was input into the wheat stripe rust spore transmission prediction model to predict the weekly wheat stripe rust transmission. Numerical simulation analysis was conducted on the main directions, pathways, and spore dispersal concentrations to generate weekly dynamic prediction maps.

10 Collection, summarization, and reporting of monitoring and forecasting data

10.1 Data Collection The data collected is as follows:

a) Wheat cultivation and management data, including but not limited to major varieties and planting area of different varieties, sowing period and wheat area at different sowing periods. Area, wheat growing season, irrigated land area, number of irrigations and timing;

b) Variety resistance data, including the rust resistance of major varieties or their resistance to currently prevalent stripe rust races;

c) The area of late-maturing spring and winter wheat cultivation in the summering area, and the area of spontaneous wheat seedling occurrence;

d) Predicted and measured values of major local meteorological elements (including daily average temperature, relative humidity, rainfall, and dew conditions);

e) Area affected by wheat stripe rust. If the disease is found in a contiguous planting area, record the total area of that planting area multiplied by the disease incidence rate, or 1000 × 667 m2. (Representative area) is the diseased area; if the disease is found in non-contiguous planting areas, the area of the diseased field is recorded as the diseased area.

10.2 Data Summary The occurrence period and extent of wheat stripe rust were statistically summarized, and the wheat planting, stripe rust occurrence and control situation were recorded to estimate yield loss. Summarize the circumstances of the loss, identify its characteristics, and analyze the causes. Record the investigation results in Table B.6.

10.3 Data Reporting Provincial-level plant protection agencies shall regularly submit data according to Tables B.4 and B.5, while county-level plant protection agencies shall regularly submit data according to Table B.7. GB/T 15795-2026. Technical Specification for Monitoring and Forecasting of Wheat Stripe Rust ICS

15 National Standards of the People's Republic of China Replaces GB/T 15795-2011 Technical Specifications for Monitoring and Forecasting Wheat Stripe Rust Published on 2026-03-

31 Implemented on October 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.