Biological Control
Biological Control - Related Videos
01:28
Biological Methods for Microbial Control
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2025
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
15:14
Establishing Fungal Entomopathogens as Endophytes: Towards Endophytic Biological Control
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Cited by 197 •
2013
This protocol demonstrates two inoculation methods to introduce the fungal entomopathogen Beauveria bassiana as an endophyte in the common bean (Phaseolus vulgaris), in preparation for subsequent evaluations of endophytic biological control.
07:28
Synthetic Biology
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2023
This video presents synthetic biology and its role in bioengineering. Synthetic biology refers to the methods used to genetically modify organisms in order to make them capable of producing large quantities of a product. This product could be a protein that the cell already makes or a new protein that has been encoded in a newly-inserted DNA sequence. Here, we discuss how an organism's genetic material is modified using transformation or transfection. Then, the process is shown in the...
13:19
The Use of Chemostats in Microbial Systems Biology
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Cited by 73 •
2013
Cell growth rate is a regulated process and a primary determinant of cell physiology. Continuous culturing using chemostats enables extrinsic control of cell growth rate by nutrient limitation facilitating the study of molecular networks that control cell growth and how those networks evolve to optimize cell growth.
02:59
Biological Effects of Radiation
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2020
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
FAQs
These natural enemies suppress target populations through different biological interactions. Predators consume individuals, parasitoids develop in or on hosts, and pathogens cause infection. Competitors can also reduce access to limited resources. The resulting level of suppression depends on species interactions and population dynamics, so biological control must be evaluated as an ecological relationship rather than as a single treatment.
Temperature, habitat conditions, and resource availability can influence interactions between natural enemies and their targets. These conditions may affect whether predators, parasitoids, competitors, or pathogens can act effectively. A program that performs well in one setting may produce different results elsewhere. Understanding environmental influences helps explain variable outcomes and supports more reliable management decisions.
Biological control relies on living organisms or their natural products, whereas broad-spectrum chemical control uses chemicals that may affect a wide range of organisms. The biological approach can help limit pesticide use and may reduce pressure associated with pesticide resistance. Its ecological effects still require careful assessment because introduced or augmented organisms can influence non-target species.
These approaches differ in how they use beneficial organisms. Introducing adds a natural enemy to a management system, conserving protects or supports enemies already present, and augmenting increases their availability or impact. Choosing among them depends on the target population, existing species interactions, environmental conditions, and the possibility of effects on organisms that are not intended targets.
A program begins by identifying the pest, disease, or invasive species and examining its interactions with potential natural enemies. Researchers then consider whether predation, parasitism, infection, or competition could reduce the target population under local conditions. They must also evaluate population dynamics, environmental influences, and possible non-target effects before selecting an appropriate management approach.
Biological control is applied in crop protection, forest management, and ecosystem restoration. In these settings, it can help reduce populations of pests, diseases, or invasive species while supporting an ecological alternative to broad-spectrum chemical control. Its outcomes depend on effective species interactions and suitable environmental conditions, and successful use requires attention to both target suppression and non-target effects.