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GB/T 27781-2026Field efficacy test methods and criterions of public health insecticides - Sprays (English PDF)

卫生杀虫剂现场药效测定及评价　喷射剂

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 27781-2026 is the English-translated version of 卫生杀虫剂现场药效测定及评价　喷射剂.

GB/T 27781-2026 is the Chinese standard "Field efficacy test methods and criterions of public health insecticides - Sprays". Its scope clause reads: This document describes the field measurement methods and evaluation of the effects of sprays on mosquitoes, flies, and cockroaches through space spraying and indoor residual spraying.

In addition, the field measurement methods and evaluation of the effect of mosquito hedge spraying. This document applies to the field evaluation of the effectiveness of sprays on mosquitoes, flies, and cockroaches through space spraying and indoor residual spraying, as well as the evaluation of mosquitoes...

On-site evaluation of the effect of hedge spraying. Its clauses include terms and definitions.

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Document preview — GB/T 27781-2026

National Standard of the People's Republic of China

ICS: 11.020
Classification: C 05
Replacing: GB/T 27781-2011

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1.Scope1
2 Normative references1
3.Terms and Definitions1
4.Methodology and Principles2
5.Test insects2
6.Reagents2
8.Test conditions3
9.Operating Steps3
9.1 Determination of the spatial spray effect3
9.2 Determination of Indoor Residual Spraying Effect3
9.3 Determination of the effect of hedge spraying3
10.Expression of Measurement Results4
10.1 Mortality rate4
10.2 Relative density decrease rate4
11 Evaluation Indicators5
Appendix A (Informative) Schematic diagram of hanging cage locations in the evaluation of spatial spray effects6
Appendix B (Informative) Specifications of Hanging Cages7
Appendix C (Informative) Calculation of Movement Speed During Space Spraying and Hedge Spraying8
Appendix D (Informative) Travel Route of Space Sprays9
Appendix E (Informative) Schematic diagram of a forced contactor10

1 Scope

This document describes the field measurement methods and evaluation of the effects of sprays on mosquitoes, flies, and cockroaches through space spraying and indoor residual spraying.

In addition, the field measurement methods and evaluation of the effect of mosquito hedge spraying.

This document applies to the field evaluation of the effectiveness of sprays on mosquitoes, flies, and cockroaches through space spraying and indoor residual spraying, as well as the evaluation of mosquitoes...

On-site evaluation of the effect of hedge spraying.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 23797 Methods for monitoring vector density (Mosquitoes)

GB/T 31715 Technical Guidelines for the Biochemical Control of Disease Vectors - Residual Spraying

GB/T 31721-2015 Terminology and Classification for Vector-borne Disease Control

3 Terms and Definitions

The terms and definitions defined in GB/T 31721-2015, as well as the following terms and definitions, apply to this document.

3.1 spray fluid

Liquid formulations containing insecticidal active ingredients, after dilution, can be used for space spraying, indoor residual spraying, hedge spraying, etc.

Note. This mainly includes microemulsions, wettable powders, suspensions, microencapsulated suspensions, ultra-low volume liquids, thermal atomizers, etc.

space spray

The liquid insecticide is dispersed into tiny mist particles with a diameter of less than 50 µm through an insecticidal device.

[Source. GB/T 31721-2015, 4.5.1.6]

3.3 Ultra-low volume spray

Using an ultra-low volume nozzle or high-speed vortex airflow, insecticide crude oil or high-concentration formulations are dispersed into very small, high-concentration mists.

Particles (< 30 µm) can cause target organisms to be poisoned by contact with fog particles.

[Source. GB/T 31721-2015, 4.5.1.10]

3.4 low volume spray

The insecticide formulation is propelled through a centrifugal nozzle by a high-speed airflow generated by a high-speed fan, and the liquid is atomized by the vortex airflow.

The particles are pulverized into droplets with a diameter of 75 µm or less, which kill the target organisms.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Editions of GB/T 27781

Edition	Title	Revision	Status
GB/T 27781-2026	Field efficacy test methods and criterions of public health insecticides - Sprays	current edition	Current
GB/T 27781-2011	Field efficacy test methods and criterions of public health insecticides - Sprays	previous edition	In force until 1 February 2027

This page sells the current edition, GB/T 27781-2026. Earlier editions are listed for reference only.

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