Do you know that in low-temperature areas, pests and diseases that prevent the growth of coffee trees are not easy to live? Taking leaf rust as an example, this is a fungus that invades the leaves of coffee and prevents the leaves proceed photosynthesis so that they cannot get enough nutrients to sustain their growth. It is said that one of the deadly point of leaf rust is - temperature. Leaf rust has destroyed the Latin American planting region and resulted in more than $ 100 million in economic losses in just two years. The ideal temperature for leaf rust outbreaks is 21-25 ° C and cannot survive at temperatures below 15 ° C. The ideal growth temperature of coffee is 17-23 ° C, when the temperature is lower than 14 ° C, or higher than 30 ° C, it is not conducive to the growth of coffee trees.
Not all coffee varieties are susceptible to leaf rust, but those less susceptible to leaf rust are often poorly flavored because they are usually derived from the more stiffness and bitter taste Robusta. To reduce the risk of disease, more and more growers are tend to grow high quality but less susceptible varieties.
It means that the propagation of leaf rust is slowed down at low temperatures. Similarly, coffee borers cause millions of dollars in losses and they can thrive at temperatures between 20-30 ° C. If temperature range higher than 30° C, coffee farms is less susceptible to leaf rust, coffee borers and other pests are not easy to live in cold conditions, accordingly, the final cup test was less affected by bad flavor.
It’s a long story, for many reasons, our one way valve tends to reduce causality to – the higher altitude area produces better coffee bean.