Predicting common bean (<i>Phaseolus vulgaris</i>) productivity according to <i>Rhizoctonia</i> root and stem rot and weed development at field plot scale.

The second principal component, accounting for 19.2% of the total bean-disease-weed data variance, demonstrated the moderately significant contributions of the initial bean dry matter (constant term or exponential parameter a ) and the dry matter increase factor (exponential parameter b ) to characterize a diverse range of bean-disease-weed development curves developed during two growth seasons ( Table 5 ).

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