Stem borers

The larval stage of various species of insect, so called because they bore a tunnel up the stem of herbaceous plants, often killing the stem. Stem pitting

See: Tristeza. Sterile

A sterile organism is one that is unable to reproduce. A sterile container or environment is one that is completely devoid of life of any description. Sterile males

An entomological technique for controlling certain insect pests. Large numbers of male insects are made sterile, usually by radio-active radiation, and are then released. They mate with females which then lay infertile eggs. The technique works best with species in which the males mate many times but the females mate only once.

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