T/YNRZ 006-2025 Longan Fruit Grading Standard

Scope

Scope: This document specifies the terminology and definitions of atemoya fruit, grading standards, and inspection methods. This document applies to fresh atemoya fruit (Psidium guajava) grading. Main technical content: 1. Terms and definitions The following terms and definitions apply to this document: 1.1 Fruit shape The external contour shape of the fruit, divided into conical, heart-shaped, oval, and round-hearted. [Source: NY/T 1809-2009, Definition 4.2.23] 1.2 Fruit shoulder shape The contour shape of the fruit shoulder, divided into double-shouldered convex, double-shouldered flat, one flat and one convex, and double-shouldered oblique. [Source: NY/T 1809-2009, Definition 4.2.24] 1.3 Fruit top shape The contour shape of the fruit top, divided into pointed round, shield round, and smooth round. [Source: NY/T 1809-2009, Definition 4.2.25] 1.4 Pericarp scale shape The contour shape of the protruding scales on the pericarp, divided into flake-shaped protrusions, elliptical protrusions, chicken-beak-shaped protrusions, spiky protrusions, flake-shaped concavities, and none. [Source: NY/T 1809-2009, Definition 4.2.26] 1.5 Pericarp scale quantity The number of protruding scales on the pericarp. 1.6 Squamosal groove The degree of prominence of the squamosal grooves on the fruit surface, divided into not prominent, relatively prominent, and prominent. [Source: NY/T 1809-2009, Definition 4.2.27] 1.7 Pruinose A waxy layer on the fruit skin. 1.8 Cracks Fruit cracking caused by adverse growing conditions, overripeness, or mechanical forces. 1.9 Fruit surface defects Damage to the fruit surface caused by natural or human factors, including compression marks, scratches, cracks, and puncture marks. 1.10 Rust spots Woody phenomena on the fruit surface caused by external factors such as frost damage, cold damage, pesticide damage, and sunburn. 1.11 Pest and disease-damaged fruit Fruit showing pests and diseases such as scale

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