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Relationship between coffee bean yield, levels of foliar macronutrients and severity of coffee leaf rust

, : Relationship between coffee bean yield, levels of foliar macronutrients and severity of coffee leaf rust. Revista Ceres 224(39): 365-377

Coffee beans of cultivar Catuai Vermelho were totally removed from plants (100%), partially removed (50%) or not removed at 3 different stages: milk stage, maturation, and just before harvesting. Each plant had 4 branches marked on 4 positions (north, south, east and west) and inoculated with a urediospore suspension of Hemileia vastatrix (0.5 mg/ml of water + Tween 80, 0.125%). Leaves were collected from branches at the 3 stages to determine the N, P, K, S, Ca and Mg contents.

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