by johnah on November 21, 2020
Avocado Tree Pictures:
1) Fungus Infection On Leaves (Leaf Rot):
2) Leaf Decay:
3) Fruit Rot:
4) Fungal Growth On Trees:
5) Avocado Disease Symptoms:
6) Avocado Tree Diseases Pictures:
Fungus Infection On Leaves (Leaf Rot):
The first picture shows the fungus infection on the leaves of an avocado tree. It looks like small black spots are growing on it.
This type of fungus is called Phytophthora infestans or Phytophthora cactorum. It is one of the most common types of fungi in the world. It affects all kinds of plants including fruits and vegetables. The fungus causes brownish-black lesions on leaves and stems. Usually these lesions are not visible but they may appear when there is high humidity. If left untreated, this disease can cause death within few weeks. You need to get rid of this fungus quickly before it kills your avocado tree!
How To Get Rid Of Avocado Leaf Spot?
A) Sulfur Dusting:
One of the best ways to get rid of this infection is by dusting sulfur on your leaves and trunk. Sulfur is a natural fungicide.
It will help remove the spots in no time. You need to spray it once every two weeks for 3-4 times. This is the most common way to treat this infection on an avocado tree.
B) Copper Fungicide:
There are also copper fungicides available in the market. You can try them too.
But be careful as they can also kill your tree if used excessively. You need to apply them once every two weeks for 3-4 times. This is another common way to treat this infection.
C) White Oil Emulsion:
This is one of the most natural ways to get rid of this fungal infection. It is very effective and has no side effects at all.
You can also use this spray to treat other fungal diseases on your plants. For an effective result, you need to spray the solution once every week for two months.
D) Mancozeb Fungicide:
This is another popular fungicide that you can use to treat this disease. It is a chemical based product that you can buy from any garden supply store.
It comes in liquid or powder form. To be effective, you need to mix it with water before application. For an effective treatment, it is recommended to apply this fungicide once every 1-2 weeks during the infection season.
E) Copper Fungicide:
This is another fungicide that can be used in treating and preventing this disease. It is also used in mixing with other fungicides for better results.
You can use this product either in powder or liquid form. It is very effective in treating this disease and other fungal infections.
F) Chlorothalonil Fungicide:
This is another chemical fungicide that can be used to treat this disease. It should be diluted in water before using it.
It has the ability to break the cycle of infection in both the host and the environment including the area surrounding your tree. You need to apply this solution once every month for three months during the infection season.
Thank you for reading this article about the avocado tree diseases. We tried our best to provide you with all the information that is required to identify and treat this infection.
If you want to add something to this article then please let us know in the comment section below. Have a good day!
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Sources & references used in this article:
Parasitism of avocado trees (Persea americana, Lauraceae) with Loranthaceae in the area of Yaounde (Cameroon). by B Sonké, D Kenfack, M Tindo – Fruits (Paris), 2000 – cabdirect.org
The nitrogen requirement of the avocado tree in California. by RW Hodgson – The nitrogen requirement of the avocado tree in …, 1942 – cabdirect.org
Natural balance of mite pests in an avocado grove by CA Fleschner, JC Hall, DW Ricker – California Avocado …, 1955 – avocadosource.com
Avocado growing in the Florida home landscape by JH Crane, CF Balerdi, I Maguire – Hort. Sci. Dept., Florida Coop. Ext …, 2007 – growables.org
Pests and diseases of the avocado. by JE Coit – California Avocado Society Yearbook, 1928 – cabdirect.org
Control of Phytophthora root rot of avocado with phosphorus acid by KG Pegg, AW Whiley, JB Saranah, RJ Glass – Australasian Plant …, 1985 – Springer
Potential economic impact of laurel wilt disease on the Florida avocado industry by EA Evans, J Crane, A Hodges, JL Osborne – HortTechnology, 2010 – journals.ashs.org
Epidemiology of anthracnose disease of avocados by RD Fitzell – … African Avocado Growers’ Association Yearbook, 1987 – avocadosource.com
The control of Phytophthora root rot of avocado with fungicides and the effect of this disease on water relations, yield and ring neck. by AW Whiley, KG Pegg, JB Saranah, LI Forsberg – Australian Journal of …, 1986 – CSIRO