21 August - Plant protection

Euphorbias: Avoid long periods of wet compost. Use Fenomenal, Subdue or Previcur Energy (EAMU 2011-1557, 21 days HI) to control Phytophthora infections. Plant Trust contains a slow-release formulation of fosetyl-aluminium. Prestop and Trianum P are biological alternatives.

Downy mildew: Control fungal growth using Amistar (EAMU 2009-0443), Fenomenal (EAMU 2013-1990), Fubol Gold WG (EAMU 2013-2288), Invader (EAMU 2012-0109), Paraat (EAMU 2011-2585), Pergado Uni (EAMU 2012-1605), Revus (EAMUs required), Signum (EAMU 2012-2141), Subdue or Valbon (EAMU 2010-1513).

Shot-hole: Apply a tank mix of Cuprokylt (EAMU 2015-1176) and Serenade ASO (EAMUs required) to outdoor ornamentals following wet weather or overhead irrigation.

Conductivity meters: Take weekly readings of liquid feed stock solutions and composts to build up a picture of controlled-release fertiliser nutrient release, using liquid feeding to maintain good levels of macronutrients and micronutrients.

Heaters: Get heaters serviced now ready for use in late autumn.

Feeding: Change to high-potash (K) products to harden up soft foliage and green up pale older leaves. Use Hortifeeds 2:1:6, Peters Plant Finisher, Sangral 1:1:3, Solufeed 1:0:3, Universol Violet or Vitax 2:1:4.

Sawfly: Apply Decis, Toppel 100, Calypso (EAMUs required), Spruzit, Pyrethrum 5EC or Hallmark WZT (EAMU 2008-2944) onto outdoor crops if pests are seen.

Frog hopper: Control with Chess WG (EAMU 2012-1434), Decis (non-IPM), Savona, SB Plant Invigorator or Toppel 100 (non-IPM).

Escallonias: Apply foliar sprays of Epsom salts (magnesium sulphate) at 15g per litre of water to run-off to avoid lower leaf yellowing.

Shading: If you use proprietary shading materials and capture rainwater from the roof, the major products are safe to crops should they appear in the tank or reservoir.

Hellebores: Control leaf spotting caused by Coniothyrium hellebori with Cercobin WG (EAMUs and restrictions apply), Octave, Signum (EAMU 2012-2141) or Switch.

Rodenticides: Always record the quantity of bait used and where it was placed. Use the CRRU code - see www.thinkwildlife.org/crru-code.

John Adlam, Managing director, Dove Associates

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