METHODS OF PEST CONTROL
Crop pests can be prevented or controlled through the following methods:
- Physical control
- Cultural control
- Biological control
- Chemical control
This involves the physical removal of pests by:
- Hand picking of insects and larvae
- Setting traps to catch rodents
- Shooting rodents with gun
- Fencing round the farm with wire nets.
- Use of scarecrow.
- List the methods of pest control
- List three ways by which pests can be removed physically
This method involves the use of farm practices to prevent or control pests, examples of cultural control are:
- Practicing crop rotation
- Use of pest resistant varieties of crops
- Appropriate tillage operations
- Burning crop residues
- Timely planting of crops
- Proper weeding or sanitation
- Timely harvesting
- Close season practices (no living plant is allowed for a certain period).
This involves the introduction of natural enemies of pests to control or keep the pests population under control. Such enemies eat up or feed on these pests, thereby reduce the population of the pests.
- List two cultural control of pests
- Explain biological pest control
This involves the use of chemical called pesticides to control pest of crop plants. Examples of pesticides are insecticide, rodenticide, avicide etc.
Examples of chemicals used to control pests are:
- Insecticides – for controlling insect pest e.g grasshopper
- Rodenticides – chemical control for rodents such as rats
- Avicides – for controlling bird pest
- Nematicides – chemical used to control nematodes. E.g worms
FORMS OR GROUPS OF INSECTICIDES
The four groups and the mode of action are:
|Group||Mode of action|
|3. Granules||Stomach (Ingestion)|
SIDE EFFECT OF THE VARIOUS PREVENTIVE AND CONTROL METHOD OF DISEASE AND PEST OF CROPS
Use of these control methods have their effect, these effects includes
- Death of some beneficial insect and soil organism, toxic exposure to animals and man, chemical residue in the environment, washing away of chemicals into aquatic life e.t.c when chemical control method is employed.
- Organisms introduced may attack cultivated crops or stored grains, predators might not feed on targeted pest and deviate to feeding on beneficial organisms, the activities of new organism might cause an ecosystem imbalance when biological control method is employed.
- When cultural control method is employed, the use of bush burning method might get out of hand thereby destroying soil structure, spread to other farms, loss of organic matter and lead to death of beneficial microbes.
- What are insecticides?
- List the three forms of insecticides and their mode of action
- What are avicides, rodenticide and nematicides are used to control
- List five economic importance of crop pests.
Revision question 10, 14 and 16 Essential agricultural science for senior secondary schools chapter 26, pages 247-248.
- Avicides are used to control _____. A. rodents B. birds C. insects D. pests
- The mode of action of liquid insecticide is_____. A. contact B. systemic C. stomach D. fumigation
- Weevils are _____ insects. A. biting B. chewing C. burrowing D. piercing
- The following are pests except. A. rodents B. earthworm C. monkeys D. nematodes
- The following are biting chewing insects except _____. A. butterfly B. locust C. grasshopper D. cricket
List two side effects each of using
- Cultural control of pests
- Biological control of pests
- Chemical control of pests
- Physical control of pests
- prevention and control of crop pests
- ways of preventing crop pests
- how do you control crop pests
- what are the control measures of pests
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