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.
Common in vegetable gardens throughout North America, the corn earworm (Helicoverpa zea) is one of the most destructive insect pests attacking corn. Itâs also known to bore into other fruiting vegetables and feed on lettuce. One worm can do extensive damage, and often a single larvae is all thatâs found on a fouled ear. The corn earworm is also a serious pest of cotton where it is known as the cotton bollworm. On tomatoes it is known as the tomato fruitworm.