22 July - Rots and camellias

Root rots Control Pythium and Phytophthora spp. infections with drenches of Fenomenal, Prestop (EAMU 2015-2773), Previcur Energy (EAMU 2011-1557), Proplant (EAMU 2012-3100) or Subdue.

Camellias Apply Cycocel to camellias for sale next spring at 3,000ppm. Continue with liquid feeding for this month only.

Top dressing Check nutrient status of older crops and top dress with Floranid Permanent, HortiTop, Sincron or Osmocote Topdress where required.

Iris Control iris corm borers, which cause Erwinia soft rot, using Calypso (EAMUs required), Decis or Gazelle SG.

Chrysanthemum white rust Check for white, cream, brown or pink pustules on leaf undersides along with yellow blotching on top surfaces. Keep leaves dry and apply Amistar (EAMU 2009-0443) or Bumper 250EC (EAMUs required) if seen. Protect plants using Karamate Dry Flo Neotec.

Wilt diseases Check aster, dianthus, hebe, penstemon and phlox especially under glass and polythene. Control using Amistar (EAMU 2009-0443), Octave, Signum (EAMU 2012-2141), Switch or T34 Biocontrol (EAMU 2012-1118).

Fruit Remove all the fruit from fruit trees before despatch if a "non-edible" spray programme has been used this season.

Pest control Maintain aphid, mite, thrips and whitefly controls as temperatures remain high even on dull days. Populations will have a quick turnaround from egg or live young to adult.

Mealy bug Check euonymus, phormiums and other plants. Control with Calypso (EAMUs required), Chess WG (EAMU 2013-2016), Decis, Gazelle SG or Hallmark WZT (EAMU 2008-2944) depending on their location and use of predators.

Powdery mildew Control using Amistar (EAMU 2009-0443), AQ10 (EAMUs required), Bumper 250EC (EAMU 2014-1274), Corbel (not on roses), Cyflamid (EAMU 2007-0512), Folicur, Kindred, food-grade potassium bicarbonate, Nimrod, Signum (EAMU 2012-2141), Stroby WG, Systhane 20 EW or Takumi SC (EAMU 2013-1294).

Slugworms Feeding from larval stages of sawfly skeletonises Prunus and Tilia leaves. Control using Decis, Gazelle SG, Hallmark WZT (EAMU 2008-2944), Pyrethrum 5EC, Spruzit or Toppel 100 (EAMU 2015-1454).

Shot hole In wet weather, or with overhead irrigation, apply tank mix of Cuprokylt (EAMU 2015-1176), Serenade ASO (EAMUs required) and a wetting agent to control bacterial infections on ornamental Prunus, Philadephus and magnolia.

John Adlam, Managing director, Dove Associates


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



These tidy evergreen trees are not just for Christmas and come in a range of shapes and sizes, writes Miranda Kimberley.

Pest & Disease Factsheet - Green manure crops

Pest & Disease Factsheet - Green manure crops

Valuable tools to combat pests and diseases, improve soils and boost nutrient levels.

Pots and containers

Pots and containers

Superior propagation products can justify extra expenditure by providing precise cell fill, optimum root development and healthy plugs, writes Sally Drury.

From The Editor - Production and retail showcase

From The Editor - Production and retail showcase

With the first entry deadlines for two of the industry's leading awards schemes looming, this is the perfect time to start thinking about which categories can best support your goals this year - and get cracking on those entries.

Seabrook on...Product showcase and valuable networking at Four Oaks

Seabrook on...Product showcase and valuable networking at Four Oaks

The Four Oaks Trade Show is a must on my calendar.

According To Edwards ... Changes large and small anticipated for UK producers

According To Edwards ... Changes large and small anticipated for UK producers

No one knows the changes that Brexit will impose on the UK over time. Some will surely be massive and they are already being guessed at. But there will be little changes too and some of those will ripple out over time to surprisingly large effect. I don't pretend to know what will happen, but it's fun to speculate.

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

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.