All the used plant extracts improved the 1000-kernel weight with two-spray application being more effective than one spray.
With two-spray application, extracts of clove, Brazilian pepper, neem, and garlic were the best treatments, improving 1000 kernel weight by 19.13%, 19.11%, 19.06%, and 19.06% increase over the control, respectively. Their effect was significantly equivalent to that of the fungicide Sumi-8 (20.23% increase in 1000-kernel weight) (Table 6).