2 April - aphids and infections

Aphids With pest numbers rising, particularly on protected crops, control them using predators alongside Chess WG (EAMUs required), Eradicoat, Majestik, Movento (EAMUs required), Naturalis-L, Pyrethrum 5EC, SB Plant Invigorator or Spruzit.

Bacterial infections Apply Captan 80WDG (EAMUs required) or Serenade ASO (EAMUs required) plus a wetting agent to foliage where appropriate. Avoid applying overhead irrigation in the late afternoon on vulnerable prunus spp. to avoid long periods of wet foliage overnight.

Iprodione Products containing this active ingredient have an end-use date of 5 June 2018.

Bark beetles Apply Decis, Hallmark WZT (EAMU 2008-2944) or Toppel 100 directly
onto stems of pines, cherries and other vulnerable crops to control emerging pests.

Whitefly Introduce Encarsia and Eretmocerus when the "scale" stage is present. Hang cards away from sun and direct irrigation. Apply Chess WG (EAMUs required), Eradicoat, Majestik, Mainman (EAMU 2013-0045), Movento (EAMUs required), Mycotal, Naturalis-L, Pyrethrum 5EC, SB Plant Invigorator and Spruzit.

Blossom wilt Check cherries, plums, damsons and apricots. If the disease is present, cut back to good wood and then apply Signum (EAMU 2010-2109) or Switch (EAMU 2010-3092).

Crinkling Differences in day and night temperatures can cause leaf crinkle. Aucuba, prunus and some herbaceous are more prone because they are leafy. Ventilate during warm days and apply fleece or Cosytex to vulnerable crops.

Flea beetles Control damage on Crambe, fuchsia, wallflowers and others using Chess WG (EAMUs required), Calypso (EAMUs required), Decis (non-IPM, EAMU 2014-1011), Majestik, SB Plant Invigorator, Hallmark WZT (non-IPM, EAMU 2008-2944), Pyrethrum 5EC or Spruzit.

Disease control Check for lavender shab (Phoma) and Botrytis on protected crops including paeonies. Include any plants that have been previously damaged in a cold spell using Rovral WG (EAMU 2018-0241), Signum (EAMU 2012-2141) or Switch.

Eelworm Apply Movento (EAMUs required) to abelia, anemone, Brunnera, buddleia, hellebores and weigela crops now to control leaf and stem nematodes that overwintered from last year. Trial on a small number of plants first to check for phytotoxicity.

Movento Phytotoxic effects have been seen on alstroemeria, begonia, cyclamen, euphorbia, ficus, fuchsia, Hedera, hydrangea, impatiens, pelargonium, Populus, Salix, saintpaulia, Tilia and Quercus frainetto.

JOHN ADLAM Managing director, Dove Associates
HorticultureWeek.co.uk/nursery


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

Product Special: protected crop structures - LEDs good for business

Product Special: protected crop structures - LEDs good for business

Concerns over climate, light levels and seasonal variability can all be overcome by using LEDs and they can deliver production benefits, Sally Drury reports.

Paeonia

Paeonia

Stocking a wide range of these impressive flowers from early March until June can boost sales, Miranda Kimberley reports.

Winning designs

Winning designs

Student anniversary collaboration generates outstanding work.


Opinion... Why flower shows need to evolve

Opinion... Why flower shows need to evolve

While the number of regional flower shows at stately homes and municipal public areas grows, the number of nurseries trading at these events reduces.

Opinion... Standardisation good for the trade

Opinion... Standardisation good for the trade

Horticulture could benefit from streamlining in the supply chain.

Opinion... Get rid of plastics in Horticulture

Opinion... Get rid of plastics in Horticulture

Blue Planet II eloquently showed the rich tapestry of life in the oceans. It also focused public awareness on plastic pollution damaging wildlife.


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. 

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