7 October - Specific off-label approvals renamed

Specific Off-Label Approvals: These have changed their name and are referred to as Extensions of Authorisation (EoA).

Autumn potting: Applying an anti-transpirant to evergreen plants such as pieris after potting may help to control excessive transpiration and prevent brown leaf tips, particularly on warm, sunny days this autumn. Make sure that autumn potted plants are in the right places for winter protection to avoid those last-minute changes as soon as frost appears. Unnecessary crop losses can occur through poor planning.

Windbreaks: Remove and burn all cut material after pruning living windbreaks to prevent transfer of any pests or diseases to nearby crops.

Leatherjackets: Maintain leatherjacket controls, particularly in liner pots, with slug pellets, nematodes or drenches of Dursban WG or Equity.

Acers: Bring in acer under-stocks that are going to be potted up for grafting. Warmer conditions should initiate new root growth. Spray newly-potted plants with Octave or Switch to start clean because some can be subject to fungal growth after they are brought under protection.

Cyclamen: Keep humidity under tight control to avoid regular spraying for Botrytis. Some products can cause petal spotting so wider spacing, careful watering and adequate ventilation are your best forms of defence.

Biological control: With winter-long Amblyseius use for thrip control, apply predator-friendly products such as Aphox, Dynamec, Majestik, Naturalis-L or SB Plant Invigorator. Gap-up plants to help predators move through crops.

Powdery mildew: Spray now to control any spores that may be present on the foliage. Clear up fallen leaves - spores will stay on them and re-infect new growth next year. Control with Amistar (EoA 2009-0443), Bumper 250EC (EoA 2009-0707), Corbel, Cyflamid (EoA 2007-0512), Folicur, Nimrod, Signum (EoA 2009-1842), Stroby WG, Swift SC (EoA 2008-2882) or Talius (EoA 2009-0420).

Vine weevil: Keep checking for larvae in untreated containers. Use Nemasys L, which is effective down to 5 degsC soil and compost temperatures, or Dursban WG or Equity. For non-edible (ornamental) crops, Intercept 70WG can also be used as a drench if no other granular neonicitinoid product has been used in the compost.

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