11 April 2016 Tinggalkan komentar
Istilah-istilah dan pengertiannya di bawah ini, berasal dari artikel Stern et al. (1959).
Biological control. The action of parasites, predators, or pathogens on a host or prey population which produces a lower general equilibrium position than would prevail in the absence of these agents.
Biotic insecticide. A biotic mortality agent applied to suppress a local insect pest population temporarily.
Biotic reduction. Deaths or other losses to the population (e.g., dispersal, reduced fecundity) caused or induced by biotic elements of the environment in a given period of time.
Economic control. The reduction or maintenance of a pest density below the economic-injury level (q.v.)
Economic-injury level. The lowest population density that will cause economic damage.
Economic threshold. The density at which control measures should be determined to prevent an increasing pest population from reaching the economic-injury level.
Ecosystem. The interacting system comprised of all the living organisms of an area and their nonliving environment.
General equilibrium position. The average density of a population over a period of time (usually lengthy) in the absence of permanent environmental change.
Governing mechanism. The actions of environmental factors, collectively or singly, which so intensify as the population density increases and relax as this density falls that population increase beyond a characteristic high level is prevented and decrease to extinction is made unlikely.
Integrated control. Applied pest control which combines and integrates biological and chemical control.
Microbial control. Biological control that is effected by microorganisms (including viruses).
Natural control. The maintenance of a more or less fluctuating population density within certain definable upper and lower limits over a period of time by the combined actions of abiotic and biotic elements of the environment.
Natural reduction. Deaths or other losses to the population caused by naturally existing abiotic and biotic elements of the environment in a given period of time.
Population. A group of individuals of the same species that occupies a given area.
Population dispersion. The pattern of spacing shown by members of a population within its occupied habitat and the total area over which the given population may be spread.
Selective insecticide. An insecticide which while killing the pest individuals spares much or most of the other fauna, including beneficial species, either through differential toxic action or through the manner in which the insecticide is utilized (formulation, dosage, timing, etc.).
Supervised insect control. Control of insects and related organisms supervised by qualified entomologists and based on conclusions reached from periodically measured population densities of pests and beneficial species.
Temporary equilibrium position. The average density of a population over a large area temporarily modified by a procedure such as continued use of insecticides.