No remaining rust observed, stronger foliage, and a measurable pH shift.

After two months and four Crop Booster irrigation applications, the supplied field documentation reports no remaining presence of rust fungi on the treated coffee trees. Foliar development became more abundant, leaf color became brighter green, and measured soil pH increased from 4.9 to 5.2.

This case study documents a before-and-after field observation rather than a separate side-by-side control plot. The supplied source reports active coffee rust before treatment and no remaining rust fungi after two months. It does not provide numerical disease-severity scores, fungicide-use data, yield measurements, chlorophyll readings, or a measured biological mechanism explaining the observed changes.

Why this matters for coffee growers: This Huila observation documented changes in disease presence, foliage condition, and soil pH during the same two-month period. Coffee rust was present before treatment and was no longer observed afterward, while foliar growth became more abundant and soil pH increased from 4.9 to 5.2. These results were reported across a field containing Colombia, Caturra, and Castillo cultivars, with no fertilization applied during the observation.