b. Determination of Growth Inhibition Category (GIC)
Plant growth inhibition (PGI) was categorized on a
growth inhibition category (GIC) scale from 0 to 4 [20],
as, no growth inhibition (0); 1-25% growth inhibition
(1); 26-50% growth inhibition (2); 51-75% growth
inhibition (3) and 76-100% growth inhibition