2 August - Preventive sprays

Leaf miner - Maintain preventive sprays on young Aesculus spp. using Admire (EAMU 2013-0975), Gazelle SG, dimethoate or Hallmark WZT (EAMU 2008-2944).

Apple scab - Damp and humidity will encourage further attacks. Monitor risk by using the Mills or Smith tables and check Pyrus, Sorbus, Crataegus, Pyracantha and Chaenomeles.

Fruit - Remove all fruit from trees before despatch if a non-edible spray has been used this season to comply with pesticide and crop regulations.

Western flower thrip - Control with Calypso, Dynamec or Conserve. Reintroduce predators seven-to-10 days after applications. Apply Macrocheles or Atheta to composts and Amblyseius cucumeris to foliage.

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

Scale insects - Control with Chess WG (EAMU 2013-1434), Dursban WG, Gazelle SG, Hallmark WZT (EAMU 2008-2944) or SB Plant Invigorator. Remove sooty mould using Rovral WG (EAMUs required) or Bravo 500 (EAMU 2011-1130).

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

Escallonia - Apply foliar sprays of magnesium chelate to prevent older leaves yellowing. Apply Epsom salts at 20g/lt water as a spray to run-off.

Leatherjackets - Present in sand beds and some will migrate into pots - similar damage to vine weevil larvae. Treat with nematodes or apply ferric phosphate-based slug pellets.

Spraying windows - Unsettled weather makes it hard to spray regularly. Add an adjuvant into your tank (check pesticide labels first) for products to stay on crops for longer.

Top dressing - Check nutrient status of older crops and top dress with Floranid Permanent, HortiTop, Sincron or Osmocote Topdress.

Root rots - Control and prevent Pythium and Phytophthora spp. with Fenomenal, Prestop (EAMU 2012-0564), Previcur Energy (EAMUs required), Proplant or Subdue.

Phoma - Control stem dieback on ceanothus, lavender and viburnum using Octave, Serenade ASO (EAMUs required), Signum (EAMU 2012-2141) or Switch.

John Adlam, Managing director, Dove Associates

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