biological control


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biological control

The natural control of one species by another, as is the use of biological pesticides.

biological control

a method of pest control using natural predators (harmless to other organisms) to regulate the size of pest populations. The technique has been mainly used against arthropod pests causing economic or medical problems. For example, red spider mites (Tetranychus urticae), which are pests of glasshouse crops such as cucumbers, are routinely controlled by application of commercially available samples of predatory mites (Phytoseilus persimilis) that feed on the red spider mites, thus reducing their numbers below an economically harmful level. See also BACILLUS THURINGIENSIS.

biological

1. pertaining to biology.
2. a medicinal preparation made from living organisms and their products; these include serums, vaccines, etc.

biological clock
the physiological mechanisms which govern the rhythmic occurrence of certain biochemical, physiological and behavioral phenomena in living organisms. See also biological rhythm.
biological control
control of a parasite by making use of its natural enemies, especially other pests. The target may also be a vector or a reservoir for infection.
biological data
usually comprise a list of vital statistics about an animal or plant species, recording such things as preferred growth medium, temperature and humidity and details of the internal milieu including blood pH, normal blood electrolytes and the like.
biological environment
includes the influence of all biological factors such as warmth, moisture and humidity, but also the plant ecosystem in which the animal lives and the associated populations of vertebrates and invertebrates that may compete for food and space, and may also act as reservoirs for infectious diseases.
biological filters
are used for the treatment of sewage effluent. They comprise a column of stones or plastic pieces which become covered with bacteria which degrade the organic matter in the effluent.
biological significance
is an estimate of the biological importance of a statistical or apparent causal association between two variables, e.g. feed supply and the occurrence of bovine acetonemia. The estimation takes into account the possible biological relationship between the two; an estimate of statistical significance would take only the mathematical relationship into account.
biological value
relationship between the amount of nutrient absorbed and the amount utilized by the body. Expressed as a percentage. Called also BV.
References in periodicals archive ?
Cotton mealybug, Hyperparasitism, Cytochrome c oxidase I, Internal transcribed spacer 1, Biological control.
These new arrivals may be introduced either accidentally or intentionally as biological control agents.
There are several types of pests used against biological control including Pathogens (bacteria, virus, fungi, nematodes) insect pest and weeds.
Agency researchers have determined that the surfaces on plums are able to harbor several species of yeast that have potential for use as biological controls against the brown rot disease found on stone fruits.
Also, training deficiency and lack of adequate awareness about pests management especially biological control using Tricogramma bee and growers' denial from held training courses were another obstacles against taking biological control in studied society.
The farmers are now also using cultural, mechanical, physical, biological control in addition to chemical methods of pest control in Pakistan (Khaliq, 2005).
Keywords: Lythrum salicaria, Galerucella, Nanophyes marmoratus, Hylobius transversovittatus, biological control, invasive species, geospatial distribution
This ability to affect the development of the hosts gives to the parasitoids a potential value to be used in biological control programs (Coudron and Brandt 1996).
Biological control is a subject area that is amenable for a constructivist pedagogical approach that facilitates student-centered inquiry for all grades, meets National Science Education Standards (NSES; National Research Council, 1996), and, as previously mentioned, promotes scientific literacy.
Encouragingly, many California citrus growers have incorporated biological control (biocontrol) -- the use of predaceous, parasitic or pathogenic organisms -- into their IPM programs.

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