The organic farmer works to create a system where pests are not eradicated but instead are kept at manageable levels by a complex system of checks and balances.ĥ. The more variety a landscape has, the more sustainable it is.Ĭlarification: The more variety a landscape has, the more sustainable it is. A key belief of the organic farmer is that biodiversity furthers health and the use of chemicals sometimes kills both useful and harmful life forms.Ĥ.
What is the method of controlling pests in agriculture by the organic farmer?Ĭlarification: In agriculture, there is a method of controlling pests that relies on natural predation rather than introduced chemicals. Our soil is also polluted through our use of weedicides to remove weeds.ģ. Which of the following is generally not polluted by the use of chemical fertilisers?Ĭlarification: The chemical fertilisers have been polluting our environment-soil, ground, water, fruits, vegetables and crop plants. Fertilisers of biological origin are of two types-manures and bio-fertilizers.Ģ. Biology Multiple Choice Questions on “Microbes as Biocontrol Agents”.Ī) Use of biological methods for controlling plant diseasesī) Use of chemical methods for controlling plant diseasesĬ) Use of morphological methods by the plants to control the attack of pathogensĭ) Use of physical methods by the plants to control the attack of pathogensĬlarification: Biocontrol refers to the use of biological methods for controlling plant diseases and pests.
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