SN/T 3442-2012Detection and identification of Witchweed(Striga Lour.) (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard is proposed and managed by the National Certification and Accreditation Administration Committee.

This standard was drafted. China Inspection and Quarantine Science Research Institute, People's Republic of China Shanghai Exit Inspection and Quarantine, the People's Republic of China State and Ningbo CIQ.

1 Scope

This standard specifies the export plant quarantine Striga (StrigaLour.) Quarantine and identification methods.

This standard applies to the entry and exit of plants, plant products Striga weeds quarantine and identification.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

SN/T 1157 export plant seedlings quarantine rules SN/T 1809 export plant quarantine rules for seed SN/T 2122 entry and exit quarantine of plants and plant products sampled

3 Terms and Definitions

The following terms and definitions apply to this document.

Textured reticulumpattern Distribution of plant seeds into a mesh surface ornamentation.

Capsule

By two or more carpels formed, containing numerous seeds, there are several ways to crack when ripe.

Grid reticulate

The seed coat raised rib surrounded by a small gap of a regular polygon.

Net wall linesofreticulum Mesh around the raised edge.

Mesh mesh

Net recessed area surrounded by walls.

Semi-parasitic plant Grab the host attached to the host plant nutrients and moisture, have chloroplasts, photosynthesis can do, and normal growth and development, flowering and fruiting.

Principle 4

4.1 Striga (StrigaLoureiro, FI.Cochinch.1. 22.1790) belongs to Scrophulariaceae (Scrophulariaceae), a semi-send