Natural Pest Control

Q.

Why are Baculoviruses excellent biological control agents?

Q.

Do blue whales eat humans?

Q.

Why should preventive measures and biological control methods be preferred for protection of crops? [3 MARKS]

Q.

Make a chart showing various diseases of some major crops, their symptoms, pathogen and measures applied for their control.

Q. Mixed cropping system controls pests and crop diseases.

1. True
2. False

Q. Question 13
Poultry fowl are susceptible to the following pathogens

(a) Viruses
(b) Bacteria
(c) Fungi
(d) All of the above

Q. Which of the following micro-organisms are used in the biological control of pests?

1. Trycoderma
2. Bacillus thuringiensis
3. Stem borer
4. Tungro virus

Q. Which of the following animals hide their food?

1. Squirrels
2. Both of them
3. None of them
4. Scrubjay

Q. Natural pest controlling methods are useful to biodiversity. Comment on it.

[3 Marks]
[APSCERT]
[Crop Protection Management]

Q. Mosquito larvae can be prevented to grow in ponds$/$ rice fields by inoculating them with

1. Microcystis
2. Aphanizomenon
3. Oscillatoria
4. Aulosira

Q. Mixed cropping system controls pests and crop diseases.

1. False
2. True

Q. Modern tool used for ploughing is________.

1. plough
2. sickle
3. hoe
4. cultivator

Q. Suggest some of the features of plants that will prevent insect and pest infestation.

Q. Some animals and birds used in biopest control are?

1. Snakes
2. All of the above
3. Lizards
4. Owls and Peacocks

Q. Which of the following is the living factor that affects crop production?

1. Temperature
2. Rainfall
3. Salinity
4. Pests

Q. Which of the following is used to preserve food grains at home?

1. Curry leaves
2. Spinach leaves
3. Tulsi leaves
4. Neem leaves

Q. ___________ are let out in the fields to destroy pests selectively.

1. Birds
2. Insects
3. Ladybirds
4. All of the above

Q. In California, citrus orchards were badly damaged by scale insects. To control these scale insects, ladybird beetles were released into these orchards. This type of pest control is known as:

1. Chemical control
2. Beetle control
3. Disease control
4. Biological control