biological control The control of pests by biological (rather than chemical) means. This may be achieved, for example, by breeding disease-resistant crops or by introducing a natural enemy of the pest, such as a predator or a parasite. This technique, which may offer substantial advantages over the use of pesticides or herbicides, has been employed successfully on a number of occasions. Examples include the control of the prickly pear cactus (Opuntia) in Australia by introducing the cactus moth (Cactoblastis cactorum), whose caterpillars feed on the plant's growing shoots, and the use of the ladybird to prey upon the scale insect (Icerya), which kills citrus fruit trees. Insect pests have also been subjected to genetic control, by releasing large numbers of males of the pest species that have been sterilized by radiation: infertile matings subsequently cause a decline in the pest population. This method has been used to control the screw worm fly (Cochliomyia hominivora), which lays its eggs in the open wounds of domestic cattle. Biological control is considered to reduce a number of the problems associated with chemical control using pesticides, but care should be taken to avoid upsetting the natural ecological balance; for example, a particular predator may also destroy harmless or beneficial species.
biological control In general, the control of the numbers of one organism as a result of natural predation by another or others. Specifically, the human use of natural predators for the control of pests, weeds, etc. (e.g. the control of rabbits in Australia by the introduction of the myxomatosis virus, and the control of citrus scale insects in California by the introduction of an Australian species of ladybird). The term is also applied to the introduction of large numbers of sterilized (usually irradiated) males of the pest species, whose matings result in the laying of infertile eggs (e.g. to control the screw-worm fly in the USA).
biological control The control of a pest species by the introduction of other organisms (e.g. the control of rabbits in Australia by the introduction of the myxomatosis virus, and the control of citrus scale insects in California by the introduction of an Australian species of ladybird). The term is also applied to the introduction of large numbers of sterilized (usually irradiated) males of the pest species, whose matings result in the laying of infertile eggs (e.g. to control the screw worm fly in the USA).
More From encyclopedia.com
Controlled Pollination , controlled pollination Weeds , Weeds WEEDS. Etymologically, "weed" derives from the Old English word for "grass" or "herb," but during the Middle Ages the meaning has changed to in… Locus Of Control , A personality orientation characterized either by the belief that one can control events by one's own efforts (internal locus of control) or that the… Integrated Pest Management , Integrated pest management (IPM) is a newer science that aims to give the best possible pest control while minimizing damage to human health or the e… Air Traffic Control , Education and Training Varies—see profile Salary Median—$102,030 per year Employment Outlook Fair Air traffic controllers coordinate the movement of… (whence , pest •abreast, arrest, attest, beau geste, behest, bequest, best, blessed, blest, breast, Brest, Bucharest, Budapest, celeste, chest, contest, crest,…
About this article
All Sources -
Updated About encyclopedia.com content Print Topic
You Might Also Like