Describe the diseases of plants?

Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter14: Diversity Of Plants
Section: Chapter Questions
Problem 13CTQ: What adaptations do plants have that allow them to survive on land?
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Describe the diseases of plants?

Expert Solution
Step 1

Plant disease is any pathological condition that affects the appearance or functions of the plant.

- The physical changes observed are changes in colour, texture, smell etc while functional changes are fruiting, flowering, growth of the plant etc

- The occurence of plant diseases depend on 3 factors:

1. A viable pathogen

2. Favourable environment

3. A suscetible host

Step 2

Diseases of the plant are:

1. Infectious:

-Fungi:Rhizoctonia.

- Bacteria: Bacterial spot disease

-Virus: Tobacco mosaic virus

- Nematodes:  Ectoparasites or endoparasites. Example: Root know nematodes

-Parasites: Dodder, red rattle

- Mycoplasmas

2. Non infectious: Nutritional deficiency like Zn, harsh environmental conditions

 Based on the appearance:

- Rots

-Leaf spot

-Rust

-blight

-wilt

 

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