29 Jun 2020
Cover Crops

Can cover crops save Florida’s citrus?

Citrus greening has devastated the Sunshine State’s orange industry. Researchers and pioneering farmers see cover crops as a road to recovery.

For the last couple of decades, a tiny insect called the Asian citrus psyllid has fed on the stems and leaves of the orange trees in Florida, infecting them with bacteria that cause a lethal disease called citrus greening. The bacterial disease, huanglongbing (HLB), originated in China and has destroyed 90 percent of the state’s groves, devastating its $9 billion citrus industry.

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26 May 2020
Citrus Export Covid-19

Strong demand for SA citrus at start of 2020 export season

A strong increase in global demand for citrus has so far been evident in the 2020 export season, according to Justin Chadwick, CEO of the Citrus Growers’ Association of Southern Africa.

In a statement, Chadwick said increased global demand for lemons had resulted in 4,5 million 15kg-equivalent cartons being shipped to date. This was double the 1,8 million cartons exported during the same period in 2019.

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27 Feb 2020
Soil Health

Soil Health in Orchards

Orchard soil health, or soil quality, is the capacity of soil to support productive trees over time without negatively affecting the surrounding environment. Soil health is influenced by interacting biological, physical, and chemical properties of soil. Active soil biological communities mineralize nitrogen, create soil structure, and compete with plant pathogens. Physical properties of soil determine its ability to store and release nutrients; accommodate water entry, storage, and movement; provide sufficient oxygen for roots and microbes; and moderate environmental stress. Chemical aspects of soil health include nutrient presence and availability, pH, cation exchange capacity (CEC), salinity, and the presence of any contaminants, such as heavy metals or persistent pesticide residues.

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27 Nov 2019
Endulini Fruit

Endulini Fruit introduces biological pest control in citrus

Consumers, and consequently supermarkets, demand products free of pesticide residues and with much of the citrus produced by Endulini Fruit being exported to Europe, the European Union Directive 2009/128/EC, which aims to reduce the risks and impact of pesticides on human health and the environment, has led to the popular citrus producer using softer pesticides and introducing biological pest control.

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31 Oct 2019
Cover Crops

Citrus Grower Sees Success with Cover Crops

Ed James has citrus in his veins. He has been working and thriving in the citrus business since he was a teenager — from hoeing orange trees to owning a caretaking business that serviced thousands of acres. That is, until about eight years ago.

In 2010, James looked around his personal 45-acre citrus grove and realized it was time to throw in the towel. The citrus industry in Florida had gone from over 800,000 acres to less than 400,000 acres. Citrus greening was the main culprit, but there were other factors for the decline. For James, it had just become completely unprofitable. The trees looked stunted and almost dead from foot rot, Diaprepes root weevil and HLB.

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26 Sep 2019
Greater varieties

South Africa wants greater varietal spread of citrus & table grapes in Japanese trade

Carolize Jansen
www.freshplaza.com

A recent visit to Japan for the annual Tokyo International Conference on African Development (TICAD), which was joined by the Citrus Growers’ Association at the behest of President Cyril Ramaphosa, provided the association with a salient opportunity to address some nagging aspects of fruit trade with that country, as well as to press the fruit industry’s interests.

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26 Sep 2019
Mandarins for harvest

Farmers, researchers try to hold off deadly citrus greening long enough to find cure

Diane Nelson, UC Davis
https://phys.org

In an orange grove outside Exeter, California, workers climb aluminum ladders to pick fruit with expert speed. California produces 80 percent of the nation’s fresh oranges, tangerines and lemons, most of it in small Central California communities like these.

“This may be the last place in the world where you can still grow citrus,” says farmer Richard Bennett, reaching high to pull an orange from a tree. He peels it in two long ribbons, and the scent of zest fills the air. “Citrus is so important to our health and economy, and it’s threatened by a devastating disease.”

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28 Aug 2019
Post bloom Fruit Drop

Plant hormone inhibitors for reducing postbloom fruit drop (pfd) of citrus

Hiu-Ling Liao, Huiqin Chen & Kuang-Ren Chung
University of Florida, IFAS Citrus Research and Education Center

Postbloom fruit drop (PFD) of citrus is caused by the fungus Colletotrichum acutatum. The fungus infects flower petals causing brownish lesions that result in young fruit drop, leaf distortion, and formation of persistent calyces (commonly called ‘buttons’) after the fruitlet drops. Previous studies suggested that an imbalance of plant growth regulators such as auxin, ethylene, and jasmonic acid in C. acutatum-infected flowers, may contribute to young fruit drop.

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