Some inject toxic compounds into the plant and some are capable of transmitting plant diseases. The symptoms of sucking pests often go unnoticed until the insects have become established in high numbers on the plant. Nuisance pests cause no real damage. They are considered pests simply because their presence is not desirable. Such insects flying, crawling or hopping about detract from the beauty of a plant.
Some nuisance pests multiply rapidly and are found in overwhelming numbers.
You can easily stop such infestations with careful cultural management and properly applied insecticide treatments. In cases where only a few plants are infested and the pests are relatively easy to find, remove the pests by handpicking. Caterpillars and beetles can often be eliminated by physically removing them. Mealybugs can often be removed with the aid of a cotton swab and alcohol. Cutworms, slugs and snails can be collected from their hiding places and destroyed.