Top. A horizontal asymptote is a y-value which a function approaches. The asymptote is parallel to x axis, so is of the form y = a, for all real values of a. Thus if f(x) = y is a function, then y = a, becomes undefined for the function, then the line y = a, is called the asymptote for the function y = f(x).
The African armyworm (Spodoptera exempta) also called okalombo, kommandowurm, or nutgrass armyworm, is an African moth. It is a very deleterious pest, capable of destroying entire crops in a matter of weeks.
The only life stage that is a problem is the caterpillar, when abundant. The female moths can lay as many as 2000 eggs during their life, so populations can build up quickly. The larvae are smooth caterpillars, not hairy like gypsy moth larvae or woolly bears. These âwormsâ can reach 1Â½ inches in length. The main body color varies among individuals from almost yellow, to yellow-green, to dark brown or blackâand there are distinctive stripes running along the length of the armyworm. The stripes are alternating dark and a salmon pink.