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INDEX
S. No. | Heading |
1. | Introduction |
2. | Distribution |
3. | Symptoms |
4. | Management: Prevention and Control |
5. | Explanation |
6. | Frequently Asked Questions |
1. Introduction
Citrus Gummosis (photo/image 01) is education of gum from the citrus plant.
Photo/Image 01

Cause of the disease | Abiotic factor– Physical injuries. Biotic factor– Fungus. |
Common Name of causal organism | Fungus– Phytophthora species |
Scientific name of causal organism | Phytophthora spp. 1. P. parasitica 2. P. palmivora 3. P. citrophthora |
Family of causal organism | Peronosporaceae |
2. Distribution
Photo/Image 02

(This is a hand drawn picture of the world. This is just for illustration purpose. This does not represent the actual political map of the world).
Citrus gummosis can be seen in all citrus growing regions in the world.
List: Citrus growing Countries and Territories in the world
Countries/Continent | Territories |
India | Maharashtra, Tamilnadu, Madhya Pradesh, Uttar Pradesh, Gujarat, Chhattisgarh, Odisha, Andhra Pradesh, Karnataka, Telangana, Punjab, Haryana etc. |
Mediterranean Regions | Mediterranean Basin, Southern Spain |
United States of America | Arizona, Florida, Texas, Hawaii, California |
Asia | South Asia, East Asia |
Australia | |
South America | Brazil, Peru, Northern Regions |
Africa | South Africa, Northern Africa |
3. Symptoms
Photo/Image 03

- Abiotic: Physical injuries
- Exudation of fresh gummy substance.
- Colour of gum is brown.
- Biotic: Fungus (Phytophthora spp.)
- Attack is first seen in bark.
- Bark turns into dark or black colour.
- Bark starts to rot.
- After bark, woody part of the stem turns black.
- Clot of gum can be seen.
- Colour of clotted gum is dark brown.
Photo/Image 04

4. Management: Prevention and Control
Photo/Image 05

Photo/Image 06

- Cleaning practice in garden is required.
- Avoid physical injuries.
- Remove the affected patches from stem in case of fungus attack.
- Use Bordeaux mixture.
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5. Explanation
Bordeaux Mixture
Bordeaux mixture is a mixture of copper sulphate and calcium oxide and water.
6. Frequently Asked Questions
Question- 1. How to prepare bordeaux mixture?
Ans.- Copper sulphate, lime and water is mixed at 5kg:5kg:50l ratio.
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