Plants disease 4.3.3.1

Question 1

How can plant diseases be detected?

Answer 1

-Areas of decay (rot)
-Spots on leaves
-Stunted growth
-The presence of pests
-Discolouration
-Malformed
stems/leaves

Question 2

How to identify a plant disease

Answer 2

-Use a gardening manual/website
-Take infected plants to a laboratory
-Use testing kits that contain monoclonal
antibodies

Question 3

What are 3 examples of plant pathogens?

Answer 3

TMV (tobacco mosaic virus)

Black spot (fungal disease)

Aphids (pests)

Question 4

What are aphids?

Answer 4

extract nutrients such as sugars from the plant, stunting its growth

Question 5

What are 2 examples of plant ion deficiencies?

Answer 5

• Lack of nitrate ion causes stunted growth-nitrate is needed for photosynthesis
• Lack of magnesium ion causes chlorosis because magnesium is required to make chlorophyll-plants loss their green colour