• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Biological pest control is better than chemical control.

Extracts from this document...


Biological Pest Control is Better than Chemical Control. A pesticide is any agent used to kill pests or control the incidence of insect pests, plant pathogens and weed populations. Biological control is the control of pest and weeds using specially chosen living organisms or biological products, whereas chemical control is the use of pesticides or chemicals to kill or control pests. Predators or parasites are used to keep the pest population low. Insects move, leaving their enemies behind, so by introducing their natural enemies to the environment the number of pests and their effect on the surroundings decreases. The population of the enemy can be increased by mass production in a lab. Releasing it when the pest is most susceptible makes it more likely this method will be effective. Selective breeding could also be used to breed a more effective insect to kill the pest. ...read more.


Fungi pathogens are controlled by the use of specific chemical fungicides, for instance, the rice blast and rice blight were both stopped by the use of a specific chemical. New compounds are being developed to stop fungi pathogens from adapting. Strobilurins are also being developed. These are based on naturally occurring fungi, and are toxic to other fungi pathogens. Old weed killers (such as 2,4D) are still in use because they are much cheaper than newer herbicides. However, a lot more is required to be effective in the killing of plants. Old weed killers are very good at killing a wide range of different weeds. However, many wanted plants may also be killed in the process. If it is washed into rivers or lakes, pondweed and other underwater plants will be killed, removing the source of food for many fish and insects. ...read more.


To develop alternative pesticides is expensive and the same thing could easily happen again. Biological pest control is generally cheaper and "some biological control measures can actually prevent economic damage to agricultural crops"(www.ncsu.edu/bio). They are usually specific and do not affect other insects or animals. There is less danger of impact on the surroundings. However, Biological control can take, months rather than weeks to become effective. The results are not as dramatic or quick as the results of chemical pesticide use. On building sites, rail tracks and motorways you may want all plant life to be killed. In these circumstance it would be better to use a chemical that will not break down or only kill certain pests. Generally, biological pest control is better than chemical control as it doesn't pollute the environment or affect other plants or animals. However, there are some circumstances when it would be more sensible to use a chemical. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Production - Location & Change section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Production - Location & Change essays

  1. The Role and Importance of Agriculture In the Carribean. Organisations involved in its ...

    Examples of organic fertilizers; - Fresh animal manure - Sewage - Compost - Green manure Advantages of organic fertilizers * Micro-organism breakdown organic, releasing nutrient slowly. Hence, nutrients are less likely to be wash out of the soil. * Contains less nutrients per kg, therefore it has a low burn potential and less likely to pollute ground water and rivers.

  2. Discuss the advantages and disadvantages of different methods of pest control

    This is obviously advantageous as the natural balance in the ecosystem remains undisturbed, which is not always the case with pesticides which may eradicate not only the pest but the predator itself, which consequently disrupts the flow in this food chain and overall ecosystem.

  1. Is Biological control an effective way of Controlling pests?

    Economically, biological control is a very effective way of controlling pests and turns out to be very cost efficient. "One study has estimated that successful classical biocontrol programs return $32 in benefits for each $1 invested in developing and implementing the program (i.e., a 32:1 benefit-to-cost ratio)."( David J.

  2. Issues associated with pest control.

    Herbicides can reduce vegetative cover of the ground, promoting soil erosion via runoff and wind. Pesticides can enter water either from the air or by runoff, where they can have harmful effects on human health and can cause disruption of aquatic ecosystem.

  1. Is Biological Pest Control Better Than Chemical Control?

    Chemical pest control should be specific. This means it should only have a lethal effect immediately on the pest involved, but harmless to other organisms, such as humans, its predators and processes such as photosynthesis. Pesticides should be biodegradable so that they break down in the soil into a harmless

  2. Different methods of pest control and their environmental issues.

    The hazards of chemical pesticide use are now widely recognized, although statistics are hard to gather. The World Health Organization estimates that pesticides every year and more than 200,000 die poison at least three million people. It is estimated that up to 25 million agricultural workers are poisoned every year.

  1. Issues associated with pest control.

    She continues by stating that big corporations want to maintain pesticide use strictly because pesticides brought the agro-chemical business thirty-one billion dollars in 1998. She concludes by contending that other ways of farming are just as productive as farming with the use of pesticides.

  2. Pest control.

    Biological Pest Control is a very economical method, and cost effective. Cost effective also in the sense that Biological Control is a permanent, self-sustaining method of managing Pests, once established, Biological Control exerts long term control over the target pest without further input.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work