Like the coffee beetle, which we reported last week, Rust Coffee leaf is one of the original threats to the production of Arabica coffee. Rusta Leaf or Roy was first discovered in 1800 and spread to almost every region of coffee cultivation in the world. The rust of leaves caused by the mushroom causes coffee trees losing leaves, which causes lower quality and performance, up to 75% of the total crop in extreme cases.
To better understand and fight Roy, World Coffee Research conducted A research project covering GLOB This “is the widest assessment of Arabica coffee varieties in various environmental conditions”, and their arrangements have just been made public.
Recently published in the journal WCR conducted global cooperation of over 20 different research colleagues representing 23 coffee cultivation places in 15 different countries. The aim of the project was to check how CLR influenced various varieties of Arabica using real conditions.
One of the many problems with the fight against CLR is that there is no single version. So far, over 55 different CLR breeds have been identified on WCR, and each of them interacts with various varieties of coffee. This is further varied by Arabica’s own diverse resistance. Arabica coffee contains retaining genes known in the SH genes. There are a total of nine different SH genes, and Arabica varieties will contain a certain combination of these genes, but so far it has not been found that there are no variety of all nine.
To understand how these interactions interacted, in 2015, WCR initiated an international multi -lane diversity study, which placed “31 Arabica coffee varieties from 11 breeding programs around the world on 29 research plots in 18 countries.” These would be 23 sites developing in 15 countries used in the newspaper.
Comparing the effectiveness of some Arabica varieties in various locations, WCR was able to get a more pronounced picture of the fight against CLR.
Their main exit is that there is no universal solution for rust with leaves. While some varieties – such as Parainema, Kartil 1 and IPR107 – showed higher resistance in many places, they found that the environment plays a significant factor. In the case of coffee production, it will affect which CLR races are present due to climatic conditions and how crops care. This creates “mighty effects of the genotype of the environment”, which means that the variety of coffee, which is extremely resistant to CLR in one developing environment, can be very susceptible to another.
They identified four main “mega-environmental”, and also indicated which “specific places in each of them were the most effective.” This allows breeders to be better prepared to test recent Arabica varieties for CLR resistance.
Currently, the best defense against rust producers is planting varieties resistant to this, and this recent study can facilitate coffee breeders determine what it means to them. For more information about the study, visit World Coffee Research’s Official website.
