It causes numerous leaf spot diseases on field crops, forages and many vegetable, and is responsable for yield losses.
... sides, getting <math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math> The left side is now a perfect square; it is the square of ...