SB5h Plant Diseases

Question 1

how is stress identified in plants? 4

Answer 1

~cameras can take photos to compare images of growth rates
~soil tests to check for nutrients
~water samples
~pest analysis

Question 2

why does disease reduce yield?

Answer 2

plants would put more energy into repairing damage from the disease and less energy into growth

Question 3

visible symptoms of a diseased plant? 4

Answer 3

~change in growth
~change in colour
~blotching on leaves
~lesions

Question 4

what can plant diseases be detected by if suspected? 4

Answer 4

~gardening manuals
~gardening websites
~test kits containing monoclonal antibodies
~taking infected plants to a lab to get checked

Question 5

what may a plant be lacking, causing it to appear to be diseased because it looks unhealthy? 2

Answer 5

~lack of nitrate ions - stunted growth
~lack of magnesium - chlorosis

Question 6

what is chlorosis?

Answer 6

yellowing of leaves due to lack of chlorophyll

Question 7

what do plant pathologists analyse and why?

Answer 7

the distribution of plants with disease to identify the most likely pathogen

Question 8

what distribution do airborne diseases cause?

Answer 8

random distribution