Da Xanh Pomelo
Quality Guide
By R. J. Nissen1, Nguyen Duy Duc2, Dr Nguyen Minh Chau3
1Department of Primary Industries and Fisheries, Queensland, Australia & 2Southern Sub Institute
of Agricultural Engineering and Post-harvest Technology, & 3Southern Fruit Research Institute,
Vietnam
CARD Project 050/04 VIE “Improvement of export and domestic markets for Vietnamese fruit through improved post-harvest and supply chain management”
By R. J. Nissen, Nguyen Duy Duc & Dr Nguyen Minh Chau et. al. 2008 Page 2
Acknowledgements
The authors wish to acknowledge that funding to produce this quality guide was provided by the AusAID Collaboration of Agricultural and Rural Development
(CARD) Project 050/04 VIE “Improvement of export and domestic markets for Vietnamese fruit through improved post-harvest and supply chain management”.
Contributing authors are:
DPI&F
R.J. Nissen SOFRI
P. Hofman Dr. Nguyen Minh Chau
S Ledger Ms. Le Thi Thu Hong
Ms Nguyen Trinh Nhat Hang
SIAEP Mr. Do Minh Hien
Mr. Nguyen Duy Duc Ms. Tran Nguyen Lien Minh
Professor Luu Trong Hieu Ms Nguyen Thi Ngoc Truc
Professor Nguyen Tho Mr Doan Hun Tien
Mr Vu Cong Khanh Mr. Nguyen Thanh Tung
Mr Le Minh Hung Mr Pham Hoang Lam
Mr Ngo Van Binh Mr. Le Quoc Dien
Mrs Tran Thi Ngoc Diep
Mrs Nguyen Vu Hong Ha
MS San Tram Anh
Ms Tran Thi Kim Oanh
The Department of Primary Industries and Fisheries (DPI&F), the Southern Sub Institute of Agricultural Engineering and Post-harvest Technology (SIAEP) and
Southern Fruit Research Institute has taken every care in preparation of this publication. The DPI&F, SIAEP and SFORI, accepts no responsibility for decisions
or actions taken as a result of any data, information, statement or advice, expressed or implied contained in this report.
© The State of Queensland, Department of Primary Industries and Fisheries, 2008.
Copyright protects this work. Except as permitted by the Copyright Act 1968 (Cth), reproduction by any means (photocopying, electronic, mechanical, recording
or otherwise), making available online, electronic transmission or other publication of this work is prohibited without the prior written permission of The
Department of Primary Industries and Fisheries, Queensland. Inquiries should be addressed to copyright@dpi.qld.gov.au (Ph: +61 7 3404 6999).
CARD Project 050/04 VIE “Improvement of export and domestic markets for Vietnamese fruit through improved post-harvest and supply chain management”
By R. J. Nissen, Nguyen Duy Duc & Dr Nguyen Minh Chau et. al. 2008 Page 3
How to use this guide
The pomelo quality guide is a tool to improve communication about pomelo quality between members of the whole supply chain (from nurserymen farmers,
collectors, wholesalers, traders, export agents, retailers and consumers). It provides a common product language to describe and assess pomelo quality.
This guide can be used by all members of the supply chain to:
• develop product specifications
• train staff in quality standards
• check the quality of consignments
• report on quality problems occurring in the supply chain
• evaluate new varieties of pomelo
The assessing pomelo quality section provides methods for sampling and assessing pomelo quality. It provides advice on how to sample pomelo and how to
assess external, internal and eating quality.
The external and internal quality sections provide colour photographs, along with descriptions, to illustrate pomelo characteristics and quality defects.
At the back of this booklet, there is a quality assessment quick guide that provides a summary of the external and internal characteristics and quality defects, as
well as assessment levels for eating quality.
Once you are familiar with the identification of characteristics and quality defects, the quick guide can be used as a reference for quality assessment.
CARD Project 050/04 VIE “Improvement of export and domestic markets for Vietnamese fruit through improved post-harvest and supply chain management”
By R. J. Nissen, Nguyen Duy Duc & Dr Nguyen Minh Chau et. al. 2008 Page 4
Table of Contents
Acknowledgements 2 Fruit size and weight grades 18
Fruit size/height to diameter ratio 19
How to use this guide 3 Fruit stem diameter to fruit size 20
Fruit shape 21
Pomelo fruit structure 5
External fruit quality defects 23
Assessing mango fruit quality 6 Insect damage 23
Sampling pomelo 6 Disease damage 25
External quality 6
Internal Quality 7 Internal fruit quality descriptions 27
Eating Quality 8 Peel/Rind thickness 27
Texture and Flavour 9 Seed number 28
Flesh colour 29
External quality descriptions 10 Mesocarp or albedo colour 30
Fruit shape 10 Segment firmness 31
Shape of fruit/stalk end 11 Segment separation from locule 32
Shape of fruit base/stalk end 12
Shape of fruit apex/fruit apex 13 Quality assessment quick guide 33
Shell/skin colour 15 Appendix b Food safety with pomelo 43
Oil Gland development 17
CARD Project 050/04 VIE “Improvement of export and domestic markets for Vietnamese fruit through improved post-harvest and supply chain management”
By R. J. Nissen, Nguyen Duy Duc & Dr Nguyen Minh Chau et. al. 2008 Page 5
Citrus fruit:- pomelo structure Description
Oil Glands (oil glands are dotted on the outer surface of
the skin) Citrus is a type of berry
Septa is the thin portions (walls) between
locules
(membranes that separates the
segments)
Peel or rind is the
pericarp and exterior to
the locules
Exocarp or Flavedo is the
outer rind layer (skin).
This part of the fruit is
coloured and contains the
oil glands.
(See oil glands below)
Mesocarp / Albedo located
in the middle of the rind
Segment is part of the
pulp and is the
vesicle/sacs or locules
and septa
Central axis or pith
(long stringy section
running down the of
the center of the fruit)
Endocarp is the inner
layer of the pericarp
Juice vesicle/sacs