20 July - Botrytis control

Signum - A new EoA (2012-1043) has been issued for amenity vegetation and interior landscapes for the control of Botrytis, fungal leaf spots, powdery mildew and rust.

Thrips - Look for scratch marks on the topside of leaves, distorted tip growth, white streaks on flowers such as clematis and petunia and black frass from feeding. Tap flower heads over a plain sheet of white paper to check for adults feeding on nectar. For protected crops, control the stages on foliage and in flowers with Amblyseius cucumeris at the high rate of 100/mt2 or apply Calypso (EoA 2006-3728), Conserve (plus sugar at 10g per 100 litres of water or Attracker), Dynamec, Naturalis-L, Pyrethrum 5EC, Savona or Spruzit and then introduce predators after the spray interval period has been completed. This can be up to two weeks. A non-IPM system can also use the more persistent products such as Decis, Hallmark WZT (EoA 2008-2944) or Toppel 100EC.

Powdery mildew - Control fungal growth on azalea, aster, catalpa, Crataegus, Humulus, lonicera, Monarda, Quercus and Rosa with Amistar (EoA 2009-0443), AQ10 (2012-1324), Attenzo (EoA 2008-2814), Bumper 250EC (EoAs required), Corbel, Cyflamid (EoAs required), Flexity (EoA 2008-2850), Folicur, Galileo (2008-2855), Indar 5EW, Lyric, Nimrod, Signum (EoAs required), Stroby WG, Systhane 20EW or Thiovit Jet.

Leaf miner - Check crops of aquilegia, Betula, buddleia, chrysanthemum, dianthus, delphinium, geum, ilex, iris, laburnum, Lathyrus, lonicera, nasturtium, potentilla and Symphoricarpos. Control with Calypso (EoAs required), Decis, Dynamec or Hallmark WZT (EoA 2008-2944).

Spider mites - Check ceanothus, choisya, convolvulus, fuchsia, Malus, Picea abies, Fraxinus, cherries and other vulnerable crops. Useful products available for this time of year include Borneo (EoA 2008-1216), Dynamec, Eradicoat, Floramite 240SC (EoA 2008-2851, forest nurseries only), Masai, Oberon (2004-1718), Pyrethrum 5EC, Savona, SB Plant Invigorator, Sequel (EoA 2009-3061) or Spruzit.

Whitefly - Keep introducing Encarsia and Eretmocerus cards at the higher rate of 9/mt2. Hang cards away from direct sunlight and irrigation. Predator-friendly products include Chess WG (EoA 2008-2834), Eradicoat, Majestik, Mycotal, Naturalis-L, Oberon (EoA 2004-1718), Pyrethrum 5EC, Savona, SB Plant Invigorator and Spruzit.


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus

Read These Next

How will the fresh-produce growing season pan out with less labour?

How will the fresh-produce growing season pan out with less labour?

The new fresh-produce season is around the corner and Brexit just over a year away, yet the Government has still given no indication that it will enable seasonal workers to come to the UK in the volumes the sector requires, either in this season or any other.

What recent developments can help growers fight orchard pests and diseases?

What recent developments can help growers fight orchard pests and diseases?

Last week's British Independent Fruit Growers Association Technical Day (31 January), heard about the latest research in orchard pests and diseases and how to deal with them.

Is a move away from plastic produce packaging now inevitable?

Is a move away from plastic produce packaging now inevitable?

A tipping point has been reached in the attitude of retailers and the Government to waste plastic which is likely to affect suppliers' future packaging options.