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By: Mary Ellen Ellis
Growingoranges and other citrus can be a fun hobby for the home gardener,but it can also become derailed by disease. Make sure you know some of the mainorange disease symptoms so that you can catch and manage problems early andstill get a great harvest of fruit.
Diseases in Orange Trees
There are several common diseases that can impact citrustrees and that are caused by fungi, bacteria, or pests. Keep a close eye onyour trees and look for the characteristic signs that you have sick orangetrees. When you know the symptoms you can quickly diagnose and manage aparticular disease.
- Greasy spot – Greasy spot is fungal infection that causes dark, greasy-looking spots on leaves, leaf drop, and reduced tree vigor. Fruits may have black specks.
- Citrus scab – Warty-looking scabs appear on fruit, twigs and leaves of trees affected with scab. Look for conical growths on leaves first.
- Citrus canker – This disease affects all citrus and is caused by bacteria. Look for lesions of dead tissue on leaves, surrounded by yellow and dark brown lesions on fruit. Severe infection causes dieback, defoliation, and early fruit drop.
- Melanose – Melanose causes raised, rough brown lesions on leaves and streaking patterns on the fruit.
- Root rot – Both armillaria and phytophthora can cause citrus root rot. Above ground, look for wilting of leaves and a thin canopy for the former and yellowing leaves for the latter. In each case, look at the roots for signs of rot and disease.
- Citrus greening – Yellowing leaves can be a nutritional deficiency, but it can also be caused by the destructive citrus greening disease. Look for yellowing patterns, small upright leaves, leaf drop, and dieback. Fruits will be small and uneven with a bitter taste.
- Sooty canker or mold – Both sooty canker disease and sooty mold can lead to limb dieback. The bark peels away, revealing a sooty black fungus.
- Stubborn disease – Likely caused by a virus, there is no known control for citrus stubborn disease. It causes fruit to grow small and lopsided. Leaves are small and tree growth stunted.
Treating Orange Tree Diseases
Knowing how to treat a diseased orange tree depends ondiagnosis. If you aren’t sure what is affecting your tree, contact your localextension office for information and assistance. Some of thesediseases can be treated, while others require that you remove the tree andstart over again.
Prevention is always best, which means being aware of diseases in your local area. Provide your orange trees with the best possible conditions because trees that are healthy and vigorous are less susceptible to disease. Especially important is providing enough water but ensuring good drainage too.
Practice good hygiene to prevent spread of disease by cleaning up debris regularly and disinfecting pruning shears and other equipment.
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I wonder if its the chemtrails or the prednisone, but the side effects seem the same as agent orange. anon1002547 December 16, 2019
I was in an A/O cleared area for weeks at a time. I feel blessed not to have suffered any negative affects (yet) but I am beginning to have problems with my feet. I did see one disease that could affect that area, but it also said had to be exposed within one year. Some diseases/issues make take decades to appear, but the VA has been treating me like dirt.
Anyway, I wonder if anyone else from Vietnam era and exposed to A/O are having similar problems with their feet? I will be70 in May and was in various parts of VN from March 69 to May 71. anon1002079 August 30, 2019
My son has an auto immune problem that has almost caused his death two times. His father was in Vietnam just before I got pregnant. How can I find out if there is a link? anon998695 August 7, 2017
When my husband came back from Nam he had to have growths removed from his head and arm.He recently died of -- as they called it -- "natural causes." He had COPD, kidney problems, heart problems, had to have a knee replaced because of an old injury form jumping off the back of a deuce and a half truck. He had continual heartburn and nothing seemed to help. He also had a hard lump behind is belly button, and the doctor said it was a hernia. Could be, but my husband said it hurt all the time. The day he died, he couldn't stay out of the bathroom. I attribute all his problems to agent orange which he said was sprayed all over them. anon989428 March 5, 2015
Any Vietnam Veteran who served in a field artillery battery was exposed to agent orange, each time the cannons were fired. The defoliant was in the cloud of dust. spiritgirl3 January 21, 2014
Research seems to indicate that children (of Vietnam Vets) are at a much higher risk of developing heart disease, diabetes or many forms of cancer than the average American and at a much younger age. There is also suggestions to do get as much information prior to seeking medical help-and if your doctor won't acknowledge your symptoms, to seek out another doctor who will.
It affects children of vets, but also grandchildren and there appears to be a high number of autoimmune diseases among these (grand) children of Vietnam veterans who have provided their health information.