Chrysanthemums in Aberdeen

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Common Pests:
- Thrips
- Leafminer
- Earwigs
- Slugs 
- Whitefly
- Capsid Bug
- Caterpillars
- Red Spider Mite
- Vine Weevil
- Sciarid Fly
- Stool Miner

Common diseases: 
- White Rust
- Verticillium Wilt
- Powdery Mildew
- Crown Gall
- Chrysanthemum Rust
- Botrytis

Common disorders:
- Nitrogen 
- Phosporus
- Potassium 
- Magnesium
- Manganese
- Copper
- Iron
- High Salt levels

Suggested settings:
- Monitor

- contact me

Date last updated: 
24 June 2008


Manganese (last updated 24 June 2008 )

The three leaves to the right show different degrees of marginal and interveinal chlorosis - the symptoms of mild deficiency.

Leaves eventually become lime green giving the plants a distinctly pale colour.

In cases of severe deficiency the upper leaves  are reduced in size and plants become spindly and stunted. Middle leaves develop yellow margins which spread interveinally. A netted appearance may be common in some cultivars.

Manganese Deficiency
Where Manganese is present to excess it can cause small brown spots to appear on mature leaves which subsequently spreads to younger growth. 

Remedial Actions
Deficiency can be addressed by spraying with a solution containing manganous sulphate.

Excess can be addressed by a combination of applying mono ammonium phosphate dissolved in water (providing the growing medium does not contain a high level of phosphate),  followed by an application of carbonate of lime.

Other information 


Website designed and published by Paul Barlow with input from Ivor Mace
Copyright 2008 Paul Barlow.