Weedicides

Q.

What precaution should be taken while spraying weedicides? Why?

Q.

What are weedicides ? Name one weedicide.

Q.

Distinguish between pesticide and insecticide.

Q.

$2,4-\mathrm{D}$ is used:

1. For higher yield

2. As weedicide

3. As insecticide

4. None

Q. Name a common weedicide .

Q.

Weedicides are used to destroy?

Q.

Define weed and weedicides.

Q. Weedicides are chemicals used to destroy

1. Weeds
2. Pests
3. Bacteria
4. Insects

Q.

Why is weeding necessary?

Q.

Weeds are controlled by chemicals called as

1. manure

2. weedicide

3. fertilizers

4. antibiotics

Q. Name one weedicide and the precaution farmers must take during its application.

Q. Weedicides are poisonous only to the unwanted plants growing in the farm land.

1. True
2. False

Q. 2, 4-D is an example of weedicide.

1. False
2. True

Q. Name the most commonly used weedicide .

Q. What is weeding? Why is weeding necessary?

Q. Which of the following are used for weeding?

1. Khurpi
2. Weedicides
3. Sickle
4. Seed drill

Q. Chemicals used to kill the weeds are .

1. weedicides
2. insecticides
3. fungicides

Q.

Weeding is necessary because:

1. weeds are poisonous

2. weeds interfere in crop harvesting

3. weeds compete with crop plants for nutrition and space

4. all the above

Q. Which of the following are used for weeding?

1. Khurpi
2. Weedicides
3. Sickle
4. Seed drill

Q. The process of removal of unwanted plants growing along with the crops is known as:

1. Ploughing
2. Winnowing
3. Sowing
4. Weeding

Q. Chemicals used to control weeds are known as ______.

1. pesticides
2. insecticides
3. weedicides
4. fungicides

Q. Weeds are controlled by chemicals called _________.

1. insecticides
2. weedicides
3. pesticides
4. fungicides

Q. Weedicides help in crop production by killing unwanted plants in the crop field.

1. True
2. False

Q. What are the necessary characteristics of a weedicide?

1. They should not affect crops
2. They should be able to kill weeds
3. They should be toxic to humans
4. Necessarily both A and B

Q. Weedicides are poisonous only to the unwanted plants growing in the farm land.

1. True
2. False