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


Slugs (last updated 24 June 2008 )

Slugs are often the most damaging of all the garden pests, affecting a wide variety of garden plants. As well as attacking the foliage, most of these slugs also devour the roots of many plants. Slugs like damp conditions and are much more common in wet years and in areas of the garden that are humid. Slugs tend to hide away under rank vegetation, wood or stones during the day and  emerge at night to feed.

The rather variably coloured, brown to cream, Field Slug Deroceras reticulatum is probably the most destructive of the surface-dwelling slugs that predominantly attacks foliage but can also damage seeds and vegetative planting material. They make irregular holes in the leaves, flowers and stems with the minute teeth that cover their rasping tongue. This feeding soon results in  very unsightly plants. 

In addition to the Field Slug, several other species of slugs are common in gardens; these are the round-backed slugs such as the garden slug, Anon hortensis; and keeled slugs,  Milax species, which tend to attack plant roots. All need mild damp conditions in which to breed, and so they avoid dry areas. During frosty or dry weather slugs bury themselves deep in the soil and hibernate over winter. Most slugs have similar life cycles. Several hundred eggs are laid annually in batches of ten to 50 most commonly during spring or sometimes autumn by an hermaphrodite parent; these are the result of cross fertilisation by another hermaphrodite in the autumn or winter. Most of the translucent eggs are laid during the spring, usually in damp soil or rotting plant debris well away from cold and dry air. The eggs can hatch fairly quickly into miniature replicas of the adults, but often this process is delayed until the weather improves. As a result in some species such as the garden and keeled slugs the complete cycle can take two years, but in the field slug takes a year.

Impact/effects on chrysanthemums
Slugs will attack all green parts and flowers.

Amateur products. 
Aluminium sulphate, sold as pellets 2 manufactures (Doff) (Westland) 

Metaldehyde sold as pellets various manufacturers. 

Metaldehyde sold as Slug Clear Liquid 

Ferric Phosphate (Organic) pellets from Growing Success 

Professional Product 
Methiocarb sold as New Draza

Other information 


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Copyright 2008 Paul Barlow.