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

Is biological control an effective way of controlling pests?

Extracts from this document...


Is biological control an effective way of controlling pests? Over 40% of the world's food production is destroyed by pests, diseases, and weeds each year. Another 20% is lost to pests after harvest. (Paoletti, Maurizio G. and Pimentel D.) Farmers usually use chemicals to control pests. However, pesticides and herbicides are an extremely harmful factor for our environment. They cause pollution in our water, air, and food. They can also kill off many beneficial insects and make infestation worse. Worst of all, it can take years for some of these chemicals to breakdown and decompose. Therefore, the use of biological control is now important. We have our environment to think about. Practicing biological pest control gives us a promising way of reducing the use of chemicals and developing alternatives that are compatible nature. So agricultural scientist tried to control unwanted plants, insects and fungi by biological methods in order to increase crop yield considerable. Biological control does not use chemical. It uses other organisms that are predators or parasites of the pest. (Indge B., Rowland M. and Baker M.) It is very important in struggle against pests that damage our agriculture and environment. ...read more.


So the generalist behavior of predators is frequently very useful for regulating a variety of pests. (iv) Parasitoid requires only one host to complete development. Usually parasitoids attack very specific pest organisms, thus they can be used in a very selective manner against particular pests. They are easily to rear, because each individual parasitoid develops within a single host. They destroy the host within which they develop. (v) Control organisms will increase in number and spread spontaneously. (vi) For large scale farmers these costs will be high to start but in the end you will have all you need and the costs will decrease. Biological control, in the long scheme of things, it costs less because it is self-sustaining and non-destructive. (vii) Biological control is a long term pest control tactic. It can be a permanent solution to a pest problem and it is highly unlikely that a pest would evolve resistance to a natural enemy, as the two interacting species both would change. There are some examples of biological control in reality * An example of this long term and permanent tactic is the Vedalia beetle. ...read more.


It requires users of the most dangerous pesticide - called restricted use pesticides -to have a special license to use them. The federal government may order people who use pesticide improperly to pay large fines.(Anderson M., Dede C. etc) Therefore more pest managers use biological control methods, such as encouraging a pest's natural enemies, to instead of the use of chemicals. To conclude, biological control can offsets the disadvantages of the use of chemicals. Therefore, biological control should be implemented whenever possible because it does not pollute the environment. It uses natural enemies of the pests for their control. Biological control should be the preferred method as chemical method causes many disadvantages when using it. Some of the reasons for using of biological control are the aspects of environmentally sound, economically feasible, time tested technique, not fully exploited, potential for use because natural enemies exist for all organisms, role in sustainable agriculture and federal mandate. (www.ento.vt.edu) Although these points are showing that using biology control is such an effective to control pests. However, there are still some people do not want practicing biology control to control pests, the reasons may be the following, need for fix, lack of patience, potent pesticides, industry advocates or easy application of pesticides. These factors lead farmers to use chemicals or other methods to control pests. ...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 Energy, Respiration & the Environment 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 Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Home Economics - Why is nutrition important to sports people?

    5 star(s)

    General points from research From the detailed research that has been carried out, the following are some general points that can be concluded concerning the ideal nutrition for a rower: o Energy is very important o This can vary from complex carbohydrates (most often, for sustained energy)

  2. Field trip report Mangrove ecosystem

    Mosses are generally found on the stone at a higher attitude ? ii. Kandelia candel Family: Rhizophoraceae General features: The tree varies in height, from 1.5 to 5 m with stilt prop root system, pale brown knee joints can be found around the tree.

  1. The advantages and disadvantages of the biological control method of pest management?

    Despite the advantages, there are also numerous disadvantages of the biological control method of pest management, which are - * Potential risk to non-target animals. * An effective biological control programme keeps numbers of the pest at a low level, however it rarely exterminates the pest completely.

  2. Heart Disease

    Pre-beta-lipoproteins are also known as low density lipoproteins (LDL), and beta lipoproteins are also called very low density lipoproteins (VLDL). They are most significant in the development of atheroma. The smallest lipoprotein particles, the alpha lipoproteins, contain a low concentration of cholesterol and triglycerides, but a high level of proteins, and are also known as high density lipoproteins (HDL).

  1. Isolation and identification of individual microbes and growth and monitoring of microbes.

    Inserting glass tubing or thermometers into bungs is generally best left to technicians, who may themselves need training. Task 3 Many different types of nutrients can be added to agar. Plan and set up a practical, which will investigate the effect of growing a micro-organism on agar containing different nutrients.

  2. Investigating the effects of different lead chloride concentrations on the growth of cress seedlings

    From here, many different molecules are produced from triose phosphate, e.g. glucose, amino acids, lipids, sucrose, starch, and cellulose. The remaining or other triose phosphates use ATP and the enzyme Ribulose bisphosphate carboxylase to create RuBP so the cycle can start again.

  1. the role of pathology service

    Suspected impaired B12 absorption can be investigated using the Schilling test. This involves giving the patient radioactive vitamin B12 and collecting urine samples over a number of days. Measuring Cholesterol levels Introduction Cholesterol is a STEROL present in most body tissues.

  2. How effective is tuberculosis (TB) treatment in less economically developed countries?

    It is important this is not left unattended as it will cause permanent scarring to the tissues of organs. Diagnosis The main method of diagnosing TB is a harmless skin test. This is performed by injecting a small amount of fluid under the skin around the forearm; this is a

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