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.
Armyworms and loopers may be present during the spring, summer or fall. Armyworms and loopers differ from sod webworms in size and feeding habits. Armyworms, cutworms and loopers grow to about -1/2 in length, or about twice the length of the full grown sod webworm.