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No new greening disease in SA – Citrus Growers

Home Agriculture No new greening disease in SA – Citrus Growers

THE local citrus industry is not being threatened by a new greening disease, according to Justin Chadwick, CEO of the Citrus Growers’ Association of Southern Africa (CGA). African Citrus Greening (ACG) is under official control in South Africa by preventing the movement of propagation material from greening areas to greening-free areas.

It is important to note that ACG cannot be spread by fruit or seed. As a result, there is no restriction on the movement of citrus fruit – and this applies worldwide. Therefore, any suggestion that export citrus can spread this disease is incorrect.

Chadwick says some media outlets are incorrectly reporting that South Africa “faces a new disease threat” in the form of “the African strain of the citrus-greening disease”. This also incorrectly conflates two diseases.

HLB (Huanglongbing or Asian Citrus Greening, which is also sometimes casually referred to as Yellow Dragon) is a feared citrus disease that has caused devastation in some citrus-producing regions globally. This disease is not present in South Africa.

African Citrus Greening (ACG) is present in South Africa and has been managed with great success since first being reported in 1932. ACG was detected in October 2023 near Gqeberha, in an area where it has not been detected before. ACG is caused by an entirely different species of bacteria, spread by a completely different vector and is a citrus disease that is not nearly as dangerous as HLB.

Once ACG had been detected in Gqeberha, further control measures including the control of the insect vector and infected plant material, were implemented to prevent the disease from spreading to commercial citrus production areas.

Chadwick says, “To link ACG in any way with current cases at the World Trade Organisation on unnecessary and trade restrictive Citrus Black Spot (CBS) and False Codling Moth (FCM) measures, is inappropriate. The CBS and FCM cases filed against the European Union is in no way related to ACG.”

African Greening is not a threat to the future of the South African citrus industry. In fact, the future of the industry is looking bright. “Despite climatic and other economic factors that had a somewhat dampening effect on projected export volumes, the industry is well on course to continue its impressive growth trajectory in the next few years. This is a testament to the hard work of the growers, the quality of our fruit and the robust phytosanitary measures implemented by the South African government and the industry itself,” says Chadwick.

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