• 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...

Introduction

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.

Middle

"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.

Conclusion

"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 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.

  1. 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.

  2. How are Africa's problems of poverty, hunger, debt and environmental deterioration inter-related?

    deforestation and the removal of nutrients from the soil, along with the incline of the land (causing surface run-off), soil erosion is prevalent. Eventually, there is not enough soil left to farm and the peasants are unable to produce food to feed themselves, generally this leads to hunger, but over

  1. Assignment on Computer Integrated Manufacturing

    In this production plant a technology called PROFIBUS is being used to link up various aspects of manufacturing of the car to better coordinate the efforts of the automation. Using real time monitoring systems the steel sheets that are used in the making of the body can be effectively pressed

  2. Issues associated with pest control.

    A bio control agent is also an introduced species, and many survive without controlling the target pest. Some may even attack non-target organisms. (10) Cultural control methods such as crop rotation, tillage, mixed cropping, removal of crop residues and sowing times to favour crop or natural enemies rather than pest may also be considered as bio control.

  1. As a region, state, and nation, we are being challenged to become more efficient, ...

    Proximity increases the concentration of information and thus the likelihood of its being noticed and acted upon. Proximity increases the speed of information flow within the national industry and the rate at which innovations diffuse. At the same time, it tends to limit the spread of information outside because communication

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

    then there is the potential of the crop being infected by diseases, fungi, unwanted plants and insects which will then lead to the rapid destruction of large areas of the crop. There are a number of different pests, for example, insects, fungi and weeds that effect individual crops in different ways; like insects, fungi and weeds.

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