Crop Protection

Q. How do weeds affects the growth of crops?

Q.

Define silo.

Q.

Define insect pests.

Q.

What are the three ways in which insect/pests attack the plants

Q. Chemicals used to kill insects that affects plant growth are called .

Q. Is a weed a monocotyledons or dicotyledon

Q.

How does an insect pest attack the plant and affect it?

Q. Undesirable plants growing along with the crops are called .

1. weeds
2. pests
3. shrubs

Q.

Match the following:

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{A) Pesticides}& \text{1) Removes unwanted plants in the field}\\ \text{B) Weedicides}& \text{2) Provides nutrients to plants}\\ \text{C) Fertilisers}& \text{3) Protection from diseases and insects}\end{array}$

1. A - 1, B - 3, C - 2

2. A - 1, B - 2, C - 3

3. A - 3, B - 1, C - 2

4. A - 2, B - 1, C - 3

Q. Identify the microorganism which causes disease in plants.

1. Pencillium
2. Tungro virus
3. Trichoderma
4. Bacillus thuringiensis

Q. What are weeds? Why should they be removed?

Q.

In which three ways small insects attack the plants? Give example of each.

Q.

explain three general methods by which insects pests attack the crop plant.

Q. During the crop cultivation, Rahul observed that plant 'X' was growing along with his crops. He sprayed a chemical 'Y' to remove this plant. Identify X and Y.

1. X is a cash crop; Y is an insecticide
2. X is a weed; Y is a weedicide
3. X is a weed; Y is a fertiliser
4. X is a fodder crop; Y is a herbicide

Q. Chemicals destroy harmful as well as useful insects.

1. True
2. False

Q. Chemicals used to kill the weeds are .

1. weedicides
2. insecticides
3. fungicides

Q. Xanthium and parthenium are examples of weeds.

1. False
2. True

Q.

Some plants are grown to be used as manure. Yet, some are removed from the field. These unwanted plants are called __.

Q. Pesticides cause water and soil pollution.

1. True
2. False

Q. Weed increases the crop yield.

1. False
2. True

Q. Discuss various methods for weed control.

[5 Marks]
[Crop Protection Management]

Q. Among the following which harms the sugarcane crop

1. Pyrilla
2. Termites
3. Locusts
4. Piricularia

Q.

Some plants are grown to be used as manure. Yet, some are removed from the field. These unwanted plants are called __.