Effects of Pratylenchus brachyurus and P. coffeae on Seedlings of Coffea arabica
AbstractTwo experiments were carried out to evaluate the effects of Pratylenchus brachyurus and P. coffeae on Coffea arabica. The first experiment was conducted in a greenhouse to determine the effects of P. brachyuras and P. coffeae on seedlings of Coffea arabica cv. Mundo Novo. Both Pratylenchus spp. reduced the growth of coffee seedlings. Higher contents of soluble sugars were detected in the leaves of infected plants. The reproduction rate of P. brachyurus was very low on cv. Mundo Novo, indicating an intolerance to this nematode. In a second experiment, C. arabica cultivars Mundo Novo and Catuaf both were intolerant hosts of P. brachyurus. Key words: caffeine, carbohydrates, chlorophyll, coffee, intolerance, Pratylenchus brachyurus, Pratylenchus coffeae, protein susceptibility.
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