From the nursery

Pot-toppers Pot-topping is becoming more popular because a smaller range of herbicides is available for protected crops. Bark-topping machinery that will automate the task is available and increasingly in use. Other products have been developed including crushed glass, coir mats, Biotop and cocoa shells, as well as polythene slips, grit and shredded Miscanthus. The effectiveness of these products depends on the time that the crop is present on the nursery, your watering regime and weed pressure from the surrounding area.

Weed control This is the best time to apply Roundup to perennial weeds. As the plant dies down for the winter the glyphosate is taken into the plant; it continues to remain at a low level of activity all winter and suppresses re-growth next season, giving you a head-start on the weeds. Where you have patches of mare's tail, I have found that glufosinate-ammonium seems to be consistently the best control product for rapid knockdown. If you use Roundup make sure you bruise the stems first and add Codacide oil, as it aids uptake and improves control. You will need several applications to get good control.

New container beds Legislation in the long term will look more closely at the water discharged from drains, so if you are planning new beds remember to include water recycling in the scheme. That will help you in controlling any contaminating discharges from your site.

Residual pests The following pests are still active in tunnels and glasshouses: whitefly, Western flower thrips, aphid, two-spotted spider mite, leaf hopper, leaf miner, mealy bug, vine weevil larvae and slugs/snails. As the temperature falls, particularly at night, Aphidius and Encarsia become less active, so chemical means of control become more necessary. If you intend to continue applying Amblyseius for thrips control through the winter, use products such as Chess WG (SOLA 2008-2834), Aphox, SB Plant Invigorator, Majestik or Dynamec.

Mites Apply Apollo 50SC to outdoor trees and shrubs with known spider mite problems as this will reduce the overwintering egg population. October is the peak for Aster lower-bud malformation, so include these and Picea albertiana 'Conica' in the Apollo 50SC programme because conifer spinning mite overwinters as an egg too. On warm days it is possible to see rust mites on ash and Malus buds. Spray with bifenthrin, chlorpyrifos or Sequel to reduce the overwintering population.


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Read These Next

Tractors: market roundup

Tractors: market roundup

Manufacturers are working to provide solutions to many challenges. Sally Drury looks at their newest models.



Brightening up gardens in autumn, these daisies are seen as a gem in the gardener's arsenal, writes Miranda Kimberley.

Are tree suppliers seeing the benefit of the health message of trees?

Are tree suppliers seeing the benefit of the health message of trees?

The message that health, the environment and business all benefit from trees is finally getting through, but are nurseries seeing an upturn? Sally Drury reports.

Opinion... Why no-deal Brexit should worry you

Opinion... Why no-deal Brexit should worry you

Whether you voted leave or remain all those years ago, a "no-deal" Brexit should worry you.

I will not be importing oaks this season. Will you?

I will not be importing oaks this season. Will you?

I find myself in a difficult situation. A few weeks ago I was fortunate to be present to hear details of imminent changes to regulations concerning Oak Processionary Moth (OPM) and oak trees. I heard details, asked questions and probed the implications of these changes. That may not sound like a difficult position to be in, yet I am uneasy.

Opinion... Better targets to tackle pollution

Opinion... Better targets to tackle pollution

Lobby groups jumping onto fashionable campaigns, often to promote their own interests, can do much more harm than good. Take, for example, the move against black polythene plant pots and containers.

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

Horticulture Week Top 60 Ornamentals nurseries

See our exclusive RANKING of ornamentals nurseries by annual turnover plus the FULL REPORT AND ANALYSIS

Tim Edwards

Boningales Nursery chairman Tim Edwards on the business of ornamentals production

Read Tim Edwards

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