• 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? A farmer's number one concern is the well being of his crops in order for them to grow efficiently and then enable him to sell them on to make money and a living for him/her and their family. A very large obstacle that is in the way of this is Pests. "Insects reduce the amount of crop harvested or damage the crop - making it unfit for use /consumption" (Revise AS Biology). These pests can affect the crop directly by feeding off them and damaging parts of the crops or indirectly by reducing the photosynthetic tissues like in the leaves so the plant has less energy to put in. There are several methods of controlling pests; one of these is Biological Control. "Biological control is a component of an integrated pest management strategy. It is defined as the reduction of pest populations by natural enemies and typically involves an active human role."(Hoffmann M.P. ...read more.


"A high reproductive rate is important so that populations of the natural enemy can rapidly increase when hosts are available." (Hoffmann M.P. & Frodsham A.C.). This quote shows us that there is a major disadvantage to biological control. When using a natural enemy it is vital that they have a good reproductive rate. If they do not then they could disperse of all the pests and then die out because of the lack of food in the area after the death of the pests. In turn this could lead to the re-appearance of the pests and no natural enemy to fight them again causing more damage again to the crops and more money needed to spent by the farmer to get more natural enemies into the environment. "Natural predators of pests can be killed/reduced in numbers, leading to increases in pest population" (Revise AS Biology). The cause of this usually comes from the fact that the natural enemies have killed off the pests and moved onto other parts and began feeding on natural predators of other pests which will again increase the pest population. ...read more.


"Unfortunately, classical biological control does not always work. It is usually most effective against exotic pests and less so against native insect pests. The reasons for failure are often not known, but may include the release of too few individuals, poor adaptation of the natural enemy to environmental conditions at the release location, and lack of synchrony between the life cycle of the natural enemy and host pest." (Hoffmann M.P. & Frodsham A.C.). In my opinion I believe that Biological Control is a very effective way of controlling pests. It has less threat to the environment unlike chemical control, people are using natural enemies to get rid of pests, and biological control is a much more cost effective away of controlling the pests. If farmers take the following steps when introducing biological control I believe that it would become very successful and few disadvantages would arise. 1). Make sure they will provide benefit in controlling the target pest 2). Make sure they will not, themselves, become pests 3). Make sure they do not harbour their own natural enemies that might interfere with their effectiveness or that of other natural enemies. ...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 ...

    The soils can be used make a quick evaluation of soils in the field. Soils colours are mainly determine by oxides of metals and organic matter. Soils display a wide range colour for example; * Reds * Browns * Yellows * Black * Green * White Organic matter cause soils

  2. Discuss the Advantages and Disadvantages of the use of Fertilisers and Pesticides in Agriculture

    Contact pesticides: these are sprayed directly onto the crop. They are absorbed by the insect through the 'spiracles' (tiny pores along the body). Contact herbicides and fungicides are absorbed directly through the surface. They have the advantage of being inexpensive but they often have to be reapplied because there would be some pests that avoid the pesticide.

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

    Conservation of natural enemies is an important part in any biological control effort. This involves identifying any factors that limit the effectiveness of a particular natural enemy and changing them to help the beneficial species. Conservation of natural enemies involves either reducing factors which interfere with the natural enemies or providing needed resources that help natural enemies.

  2. Is Biological Pest Control Better Than Chemical Control?

    In killing secondary consumers and pollinators, insecticides may do more damage than that done by the original pests by upsetting the balance of the ecosystem. Secondary consumers (birds and mammals) are not killed directly by insecticides, but they have less to eat when there are fewer insects.

  1. Assignment on Computer Integrated Manufacturing

    Pioneer Magnetics Pioneer Magnetics is a profitable power supply manufacturing that has successful utilise the concept of CIM [13]. However they have been implementing CIM for at least 10 years, showing that CIM is not an easy to use ideology, it takes time and careful planning in order to fully gain the advantages from CIM.

  2. "Bottom up not top down!" Is this the way ahead for Aid and Investment ...

    Governments in some developing countries tamper with their indicators of development to make them appear poorer than they are so they receive extra aid payments. Projects encouraged are often inappropriate to the needs of the poorest e.g. a new international airport.

  1. Is biological pest control better than chemical pest control?

    Also weeds can sometimes have broad leafs that cover the crops and so take all the sunlight and restrict the amount of sunlight reaching the crop. The competition between the crops and weed, which is organisms of different species, is known as interspecific competition.

  2. Issues associated with pest control.

    Unlike some insecticides, bio controls are often very specific for a particular pest and other helpful animals, or people can go unaffected or disturbed by their use. However, bio control programs typically cost more. In addition to bio control agent(s), more labour in the areas of scouting is required, compared to applying of a conventional pesticide.

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