- Hydroponic Grower - Livingston (Tennessee) USA
- Assistant Grower - Chatham (ON) Canada
- Director - Eastern U.S.
- Commercial Specialist
- Product Development Specialist Tomato
- Customer Service & Supply Chain Seeds
- Business Development Manager - Vietnam
- Senior Grower - Harrisonburg (VA) USA
- Teamleider Veredeling - Rijsenhout
- Head Grower - Telangana, India
Top 5 -last week
Top 5 -last month
Dry matter and acidity as quality index for Hayward kiwifruit
Measuring the soluble solids content of kiwifruit juice at harvesting is the official method to evaluate the fruit maturity in the most kiwifruit producing countries, such as New Zealand, Italy, France, Greece, Chile, Japan and the United States.
For harvesting the kiwifruit, the minimum level of soluble solids should range from 5.5 to 6.5%, because the researchers have observed that the fruit with a content less than 6.2% can be kept in cold storage for up to 3 months only.
A US research team (Crisosto et al., 2012) has conducted several studies on dry matter content as kiwifruit quality index from 1999 to 2008 in California. The researchers have found that the dry matter and soluble solid content changed highly among the vineyards and seasons, while the titratable acidity values changed more among the seasons than among the vineyards.
After years of observations and measurements, the results demonstrate that consumer acceptance of kiwifruit is affected by the dry matter and the acidity levels. To maximize the consumer satisfaction, the researchers propose that the minimum quality index should be with ≥16.1% of dry matter when the titratable acidity is ≥1.2%, or with 15.1% of dry matter when the titratable acidity is <1.2%.
The authors have demonstrated that the dry matter content is a reliable quality index to satisfy the consumer acceptance, but it is not a reliable maturity index, because it is fundamental to consider also the soluble solid content and the fruit firmness at harvesting to storage the kiwifruit for long periods. The studies have marked that the dry matter as quality index has some limitations in predicting the long term cold storage performance of kiwifruit.
Source: Crisosto G.M., Hasey J., Zegbe J.A., Crisosto C.H., "New quality index based on dry matter and acidity proposed for Hayward kiwifruit", April-June 2012, California Agriculture, Volume 66, No. 2, pagg. 70-75. http://escholarship.org/uc/item/9xj0f3tb#page-1
Receive the daily newsletter in your email for free | Click here
Other news in this sector:
- 2021-05-05 "By extending the UK season we avoid the unnecessary food miles from imported strawberries at this time of year.”
- 2021-05-05 Egyptian grape season started, three weeks earlier than expected
- 2021-05-05 Organic apple importer differentiates by importing as well as growing in-country
- 2021-05-05 Delayed start for domestic blueberry volumes
- 2021-05-05 Japan frustrated by Chinese and Korean strawberry and whisky copycats
- 2021-05-05 Malaysia: Ministry wants local fruit exported via airasia farm
- 2021-05-05 IPS created subsidiary in South Africa
- 2021-05-05 Strawberry prices plummeting in China
- 2021-05-05 Almeria's melons and watermelons achieve good prices at the beginning of the season
- 2021-05-05 The study to obtain new cherry varieties in the Guadalentin Valley advances
- 2021-05-05 The province of Almeria produced more than half of the watermelons that Spain exported in 2020
- 2021-05-05 Celebration caps successful season for South African table grapes in China
- 2021-05-05 "Our new greenhouses mean we can meet the early demand for redcurrants, raspberries even better"
- 2021-05-05 Key challenges of the Chilean cherry industry
- 2021-05-05 "Until mid-May there will be an apricot shortage of about 50%"
- 2021-05-05 Marisol strawberry, excellent characteristics in both traditional and soilless cultivation
- 2021-05-05 medFEL publishes European apricot harvest estimates
- 2021-05-05 Collaboration and investment signals bright future for Australia’s apple and pear industry
- 2021-05-05 New-gen rootstocks deliver earlier and more production
- 2021-05-04 Wholesale fruit prices drop in Punjab, Pakistan