rhs level 2 pests and diseases activity answers
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RHS Level 2 Certificate
Pests and Diseases Activity –
Identify the problem and the available controls.
Common name and controls?
• Aphid• Controls – fatty
acid spray (contact); imidacloprid (systemic); Aphidoletes aphidzyma (biological)
Common name and controls?• Vine Weevil (adult)
• Controls – traps (sticky bands on pots), imidacloprid or thiacloprid (systemic)
• For larvae – Steinanerma krausei (biological);imidacloprid or thiacloprid (systemic)
Common name and controls?
• Common Slug• Controls –
metaldehyde or ferrous sulphate (chemical); Phasmarhabditis hermaphrodita (biological); baited traps (cultural)
Common name and controls?• Powdery Mildew
• Gather up and burn debris (cultural); myclobutanil (systemic fungicide);avoid water stress (cultural)
Common name and controls?
• Downy mildew (note growth is on underside)
• No chemical control; resistant varieties (cultural); remove and burn affected plants (cultural).
Common name and controls?
• Honey fungus
• Remove all affected plants and dead wood (cultural); butyl rubber barriers (cultural); grow resistant plants (cultural). No chemical or biological controls.
Common name and controls?
• ‘Red Thread’ - fungal disease in lawns.
• Controls – no chemical for the amateur; scarify to remove thatch where spores overwinter (cultural); nitrogenous feed (cultural); improve drainage (cultural).
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