Sphaceloma fawcettii var. scabiosa

What is Lemon Scab

Also called Verrucosis or Citrus Scab, this fungal disease causes raised roughened warty lesions to form on the outside of the fruit. Although the inside of the fruit is unaffected, the disease should be controlled, because it gradually reduces the vigour of the tree. Damp, cool weather encourages the disease spores to spread. It’s best to adopt a preventative approach to control Verrucosis, with a regular spray program.

Citrus are very hungry trees; regular feeding with Yates Thrive Citrus & Fruit Granular Plant Food helps them withstand the weakening effect of Verrucosis.

During hot and dry weather, it also helps to water deeply and regularly around the root zone to help your citrus resist the disease – trees suffering from water stress are more susceptible to it.



Rough patches also appear on the stems and leaves, and fruit drop often occurs.


Plants impacted

  • Lemons

How to Control Lemon Scab

Spray with Yates Copper Oxychloride before flowering, and after petal fall, at 3-4 weekly intervals until harvest.


Recommended products

Yates Nature's Way Fungus Spray

Protects against a very wide range of fungal and bacterial diseases. It is formulated from copper and sulfur, which are naturally occurring compounds.

More articles

Brown Rot

Brown rot is a fungal disease of stonefruit and citrus fruits. The fungus overwinters in mummified fruit which has either fallen to the ground or is still attached to the tree.

Citrus Collar Rot

Citrus Collar Rot is a soilborne fungal-like disease which usually causes the base of the trunk of citrus to rot. Most prevalent after excessive water.

Sooty Mould

Sooty mould is a fungal disease which presents as a black powdery substance coating plant leaves, stems and twigs usually accompanied by a sticky residue.

Powdery Mildew

Powdery mildew is a fungus which spreads a white or ash-grey film over the upper and lower surfaces of the leaves of plants-usually the older leaves.