T/HNXGJSH 02-2022 Quality Standards for Early-ripening Wenzhou Mandarin Oranges

Scope

Main Technical Content: I. Huaining Early-Ripening Wenzhou Mandarin Grading Standards 1. Basic Requirements for Fruit Shape: - The fruit should have the inherent shape of the variety, with a wider top and a narrower base. The shape should be consistent, without deformities. The fruit stem should be intact and flush with the surface, without wilting. - **Extra Grade**: Flat-round shape, with a fruit shape index of 0.79±0.1. - **First Grade**: Highly flattened round shape, with a fruit shape index ≤0.95. No obvious bulges near the fruit stem. - **Second Grade**: Highly flattened round shape, with a fruit shape index ≤1.1. Slight bulges or short necks near the fruit stem. 2. Basic Requirements for Color: - The fruit should have the inherent color of the ripe fruit of the variety, with uniform coloration. - **Extra Grade**: Orange-yellow to orange-red, with a coloration rate ≥90%. No discoloration spots. - **First Grade**: Orange-yellow, with a coloration rate ≥80%. No significant discoloration spots. - **Second Grade**: Orange-yellow to orange, with a coloration rate ≥70%. 3. Basic Requirements for Fruit Surface: - The fruit surface should be clean, with smooth skin and large, protruding oil glands. No cracked or rotten fruits. - **Extra Grade**: Very few injury spots, disease/insect marks, or pesticide residues. All combined marks ≤1.0cm2, with the largest single mark ≤0.2cm2. - **First Grade**: Minor injury spots, disease/insect marks, or pesticide residues. All combined marks ≤2.0cm2, with the largest single mark ≤0.5cm2. - **Second Grade**: Permitted minor injury spots, disease/insect marks, or pesticide residues. All combined marks ≤4.0cm2, with the largest single mark ≤1.0cm2. 4. Skin Thickness (mm) - **Extra Grade**: Fruit stem thickness ≤1.5mm at the waist, and base skin thickness ≤1.8mm. - **First Grade**: Fruit stem thickness ≤1.8mm at the waist, and base skin thickness ≤2.0mm.

Development Information

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