Insecticide disruption of biological insecticide control and the resulting pesticide treadmill have serious public health implications. One is the increased burden of pesticides in the environment. The other is the acceleration of pesticide resistance in insect vectors of diseases. Biological control requires more intensive management and planning.
May take longer, require more records, and require more patience and education or training. Chemical pesticides are potent substances designed to destroy pests. This damage is generally reduced because farmers often have to follow strict laws regarding the use of pesticides. These laws include regulations on permitted levels of pesticides in crops and on the storage, transportation and application of chemicals.
However, despite all regulations, we ingest pesticides in our food and beverages, inhale them from the air we breathe, and absorb them through our skin.
Biological pest controlinvolves human action and is often achieved through the use of beneficial insects that are natural enemies of the pest. Biological control is not the natural control of pests by their natural enemies, the resistance of the host plant, or the prudent use of pesticides. Researchers go to the pest's native habitat, study and collect the natural enemies that kill the pest there, and then send promising natural enemies back to analyze and release them.
Biological control can be used against all types of pests, including vertebrates, plant and weed pathogens, as well as against insects, but the methods and agents used are different for each type of pest. It can also be used as a preventive technique by releasing small numbers of natural enemies early in the pest's lifecycle. Biological control is defined as the suppression or prevention of a pest outbreak by intentionally manipulating natural enemies. Over the years, additional natural enemies have been added to control other pests, such as thrips, leaf miners, aphids, caterpillars, and additional whitefly species, as needed.
However, adult females of certain parasites (such as many wasps that attack scales and whiteflies) feed and kill their hosts, providing an important source of biological control, in addition to host mortality caused by parasitism. I need the reason biological control is better than chemical control in pest and parasite control.
Biological pest controloften takes longer to work than the chemical method and often reduces the pest population to a low level rather than completely eliminating it. The need for pesticides can be reduced through the use of resistant varieties, cultivation methods that reduce pest abundance or damage, methods of manipulating mating behavior or host search, and, in some cases, physical methods of control.
The imported red ant, a serious pest in the southern United States, is parasitized by a small forid fly native to its South American range. Populations of some aphids, caterpillars, mites and other invertebrates are sometimes drastically reduced by natural pathogens, usually under conditions such as prolonged high humidity or dense pest populations. Insects that were once of little economic importance often become harmful pests when they break free from the control of their natural enemies. A major benefit of biological control is its relative safety for human health and the environment, compared to the widespread use of broad-spectrum pesticides.
In addition to an outbreak of natural disease (epizootic), some beneficial pathogens are commercially available as biological or microbial pesticides. Each of these control agents is a natural enemy that can be used to reduce, delay, or prevent pest infestations. .