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Which of the following bacterium is used as a biopesticide?

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Bacillus cereus

  2. Bacillus thuringiensis

  3. Bacillus polymyxa

  4. Bacillus anthracis

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Correct Option: B
Explanation:
Bacillus thuringiensis, or Bt, is a soil bacterium. Thurioside is a toxin produced by the bacterium, Bacillus thuringenesis. It is used as a bioinsecticide. , when sprayed on plants, is toxic to certain pest insects. For years, farmers and home gardeners have used Bt as a microbial spray pesticide to control caterpillars, certain types of beetles, as well as mosquitoes and blackflies. 
Therefore, the correct answer is option B.

The use of a natural predation against another pathogenic organism is called as

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Genetic control

  2. Biological control

  3. Artificial control

  4. Pesticidal control

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Correct Option: B
Explanation:
The safest method of pest control is biological control. It involves the use of natural predators, parasites to prevent the growth of harmful pests like insects, mites by natural mechanism and active human control.
So, the correct answer is 'Biological control'

Find the odd one out:

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Rodents

  2. Birds

  3. Moisture

  4. Enzymes

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Correct Option: C
Explanation:

There are biotic and abiotic factors that damage the food materials. Moisture is the abiotic factor that damages the food material if it is raised to undesirable amount.

Stopage of reproduction in an organism by creating hurdle in its biology or physiology or its distraction by use of another organism is known as

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Predation

  2. Competition

  3. Biological control

  4. Physiological control

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Correct Option: C
Explanation:

(c) Biological control methods include using natural predators of pests, using resistant varieties, crop rotation, etc.

Which one of the following is resistant to white rust disease

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Pusa Sem 2

  2. Pusa Komal

  3. Pusa Sawani

  4. Pusa Swarnim.

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Correct Option: D

When a natural predator (living organism) is applied on the other pathogen organisms to control them, this process is called as:

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Biological control

  2. Genetic engineering

  3. Artificial control

  4. Confusion technique

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Correct Option: A
Explanation:

Indiscriminate eradication of pests is undesirable because without them the beneficial predatory and parasitic organisms which depend upon them for food would also be eliminated. The biocontrol method of pest and pathogen control involves use of viruses, bacteria and other insects (which are their natural predators and pests).

In our country, vast tracts of forest are cleared and a single species of plant is cultivated. This practice promotes

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. biodiversity in the area

  2. monoculture in the area

  3. growth of natural forest

  4. preserves the natural ecosystem in the area

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Correct Option: B

There are two methods for protection of crops is.

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Chemical and biological

  2. Chemical and radiological

  3. Electrical and biological

  4. Both A and B

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Correct Option: A
Explanation:

There are two methods used for controlling the insects and pests on crops viz. chemical methods and biological methods.

Bordeaux mixture was discovered by

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Millardet

  2. Burgandy

  3. Louis Pasteur

  4. Koch

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Correct Option: A
Explanation:
Professor Pierre-Marie-Alexis Millardet of University of Bordeaux discovered the Bordeaux mixture.
So, the correct option is 'Millardet'

The planet which is farthest from the Sun is _____. 

evs - i our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

  1. $Pluto$

  2. $Uranus$

  3. $Neptune$

  4. $Mars$

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Correct Option: C