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Differences between Arabica and Robusta

  Arabica Robusta
Date species described 1753 1895
Chromosomes (2n) 44 22
Time from flower to ripe cherry 9 months 10-11 months
Flowering after rain irregular
Ripe cherries fall stay
Yield (kg beans/ha) 1500-3000 2300-4000
Root system deep shallow
Optimum temperature (yearly average) 15-24° C 24-30° C
Optimal rainfall 1500-2000 mm 2000-3000 mm
Growth optimum 1000-2000 m 0-700 m
Hemileia vastatrix susceptible resistant
Koleroga susceptible tolerant
Nematodes susceptible resistant
Tracheomycosis resistant susceptible
Coffee berry disease susceptible resistant
Caffeine content of beans 0.8-1.4% 1.7-4.0%
Shape of bean average 1.2% average 2.0%
Typical brew characteristics flat Oval
Body acidity bitterness, full

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