Procafé: Moderate Cold Damages Brazilian Coffee Farms
CoffeeNetwork (New York) – In a recent report published by Brazian-based Procafe, they noted that the first cold wave in the country, which occurred on June 19th, has shown harmful effects on the leaves of coffee trees in several higher areas in the South of Minas Gerais.
Temperatures below zero degrees Celsius can cause the leaves and plant branches to “burn
due to frost or frost like conditions. The leaves become dark brown.
Another effect of cold occurs when temperatures are above zero degrees, in the range less than 5-7 degrees, when light burning can occur and restrict the development of new leaves. It is common in the youngest leaves, which are located at the tip of the lateral branches and younger plants, where the cold accumulates at its top.
At first, low temperatures make the new leaves a light yellow color. Then, the young leaves present partial burns, that turn into dark spots. Where the cold is more intense, it also burns the tip of the branches. This process paralyzes the growth of the branch and causes the branch break, which induces the formation of secondary roots, in large numbers, giving rise to vegetative buds. These buds then flower, leading to a super-budding that is harmful to productivity.
Cold burning, even mild, caused by injuries can also facilitate the entry of fungi and bacteria, causing injury and death of tissues.
Procafe has provided some photos of recent damage, which can be seen here: http://fundacaoprocafe.com.br/sites/default/files/publicacoes/pdf/folhas/Folha%20467%20-%20Frio%20moderado%20traz%20danos%20em%20cafeeiros.pdf
CoffeeNetwork will continue to monitor the temperatures and will report on more information as it becomes available.