Plant Diseases

Question 1

Name three plant diseases

Answer 1

Rose Black Spot
Tobacco Moasaic Virus
Aphids (insects) cause plant disease

Question 2

Name the three ways that specific plant diseases can be identified

Answer 2

1. Looking at a gardenin manual or website
2. Going to a lab to identify the pathogen
3. Using testing kits which contain monoclonal antibodies

Question 3

Name two ion defficiencies found in plants

Answer 3

1. Nitrate ion defficiency
2. Magnesium ion defficiency

Question 4

What is stunted growth caused by

Answer 4

A lack of the nitrate ion

Question 5

What is chlorosis caused by

Answer 5

A magnesium ion defficiency

Question 6

How does a nitrate ion defficiency cause stunted growth in plants

Answer 6

The nitrate ion is needed for protein synthesis which helps plants grow.
So a nitrate defficiency results in stunted growth

Question 7

What is chlorosis?

Answer 7

A condition in plant leaves which causes leaves to turn yellow due to a lack of chlorophyll

Question 8

How does a magnesium defficiency cause chlorosis?

Answer 8

Magnesium is used to synthesise chlorophyll
Without magnesium, there will be a lack of chlorophyll, which will cause leaves to turn yellow

Question 9

State four things you may see to help you to detect a plant disease

Answer 9

1. Discolouration
2. Spots on leaves
3. Stunted growth
4. Presence of pests