24 June - Infections and mites

Bacterial infections Maintain Cuprokylt (outdoor crops only, EAMU 2015-1176) and Serenade ASO (EAMUs required) sprays on Prunus spp.

Tarsonemid mites Apply Apollo 50SC (EAMU 2014-1271), Dynamec, Envidor (outdoor use only, EAMU 2016-0997) or Oberon (EAMU 2004-1718). Use biological control agents under protection such as Amblyseius cucumeris, A. andersoni and A. californicus. Check compatibility with listed insecticides.

Ribes blister aphid Pest feeding causes leaf distortion, blistering and discolouration of foliage - red or sometimes yellow. Control further damage using Decis (EAMU 2014-1011), Hallmark WZT (EAMU 2008-2944), Spruzit or Pyrethrum 5EC.

Downy mildew Continue controls on Buddleja, Digitalis, Hebe, pansies and roses. Use Amistar (EAMU 2009-0443), Fubol Gold WG (EAMU 2012-0217), Invader (EAMU 2012-0109), Paraat (EAMU 2011-2585), Signum (EAMU 2012-2141), Subdue or Valbon (EAMUs required).

Predators Increase predator numbers week on week. Switch to more heat-tolerant species such as Amblyseius andersoni or A. californicus for spider mite control.

Ash leaf sucker Prevalent this month, causing leaf-edge curling and purple discolouration. Apply Decis or Hallmark WZT (EAMU 2008-2944) if required.

Guttation Improving airflow on protected Buddleja, Digitalis and Phygelius will reduce the risk of black spots on leaves and stems.

Pine shoot moth Decis or Toppel 100 (EAMU 2015-1454) will help disrupt egg-laying and hatching.

Leaf spots Maintain controls on Astrantia, hellebores, pansies, Phormium, roses and yucca. Products include Amistar (EAMU 2009-0443), Bravo 500 (EAMU 2011-1130), Rovral WG (EAMU 2011-3200), Octave, Serenade ASO (EAMUs required), Signum (EAMU 2012-2141) and Switch.

Whitefly Control on ornamental crops using Chess WG (EAMU 2013-2016), Eradicoat, Mainman (EAMU 2013-0045), Majestik, Mycotal, Movento (EAMU 2011-1987), Naturalis-L, Oberon (EAMU 2004-1718), Savona or SB Plant Invigorator. For non-IPM situations, use Decis (EAMU 2014-1011), Gazelle SG, Hallmark WZT (EAMU 2008-2944), Pyrethrum 5EC, Spruzit or Toppel 100 (EAMU 2015-1454).

Escallonias Avoid yellowing and defoliation of lower leaves with foliar sprays of Epsom salts - 15g per litre of water - to run-off.

Irrigation Regularly check crops along bed edges and pathways - do not assume automatic irrigation systems produce even output at the right intervals.


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

Business planning - improving productivity through training

Business planning - improving productivity through training

How to create a structured training programme for your staff to give your business a competitive edge, by Neville Stein.

Pest & Disease Management - Nursery hygiene

Pest & Disease Management - Nursery hygiene

How to create an effective hygiene programme that will support profitable growing.

Zantedeschia

Zantedeschia

These elegant plants feature a variety of striking flower shapes in a range of colours, writes Miranda Kimberley.


15 December - Edibles and Botrytis

15 December - Edibles and Botrytis

Opinion... Winning support for nursery stock

Opinion... Winning support for nursery stock

Regardless of whether or not you voted for Brexit (I voted to remain), most politicians seem to think that it is now going to happen. What will that mean for nursery stock production in the UK?

Editorial ... Supporting horticultural excellence

Editorial ... Supporting horticultural excellence

The team at Horticulture Week are delighted to launch the leading industry awards schemes for 2018 supporting, encouraging and broadcasting excellence across all areas of horticulture business, people and places.


Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +
Horticulture Jobs
More Horticulture Jobs

Tim Edwards

Boningales Nursery chairman Tim Edwards on the business of ornamentals production
 

Read Tim Edwards

Ornamentals ranking

Top 30 Ornamentals Nurseries by Turnover 2017

Top 30 Ornamentals Nurseries by Turnover 2017

Tough retail pricing policies and Brexit opportunities drive the top 30 growth strategies.

Pest & Disease Tracker bulletin 

The latest pest and disease alerts, how to treat them, plus EAMU updates, sent direct to your inbox.

Sign up here

Are you a landscape supplier?

Horticulture Week Landscape Project Leads

If so, you should be receiving our new service for Horticulture Week subscribers delivering landscape project leads from live, approved, planning applications across the UK.

Peter Seabrook

Inspiration and insight from travels around the horticultural world
 

Read more Peter Seabrook articles