Chlorosis is caused by a mineral deficiency and is due to a lack of magnesium, manganese or iron. It usually only affects acid-loving species such as Azaleas.
Chlorosis: A yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity, and nutrient deficiencies in the plant.
Diseases: Chlorosis, Powdery Mildew and Sooty Mold
Medical Use:
Health Hazard: ...
Chlorosis can occur on very alkaline soils, though otherwise its pH tolerance is quite high. As concerns levels of moisture, the red maple grows everywhere from dry ridges and southwest facing slopes to peat bogs and swamps.
Pests and diseases: Aphids, scale, chlorosis, mealy-bugs, snails. Red spider mites find this plant a special treat, and will attack it over any other plants in the area.
Note: Plants labeled as susceptible to chlorosis when grown in the ground should not have this problem in a container with a quality soil mix and regular fertilizer schedule.
One of the first symptoms of a root bound plant is chlorosis resulting from the inability of the aged root system to take up essential nutrients.
If your plant isn't getting enough iron, it will get chlorosis. The leaves or needles will turn yellow - while the veins will remain green. This usually occurs in chalky or lime soil, which "locks up" the iron. Repot and change the potting compost.
In fact one the first symptoms of a root bound plant is a general chlorosis despite the fact that it is adequately fertilized. Root pruning and repotting a root bound plant will invigorate it and cause a flush of new growth.
Rasping/Slurping - (mites and thrips) - scrape epidermal layer, lap out chlorophyll - symptoms are called chlorosis (yellowing), stippling (dot effect) ...
The roots lose their ability to absorb nutrients like iron, and interveinal chlorosis is clearly exhibited by the leaves. Attempting to cure this problem with liquid iron or iron supplements to the soil is only a short term solution.
require regular replacement feeds of specially formulated fertilisers which ensure that their soil ph remains acidic, ericaceous fertilisers also contain higher levels of chelated iron which is required by lime-hating species to offset chlorosis.
 See also: Bonsai, Plant, Species, Pruning, Repotting
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