From the nursery

Apple and pear sucker - The suckers are often first spotted by the black sooty mould on the leaves. Control the sucker with Hallmark with Zeon Technology (only approved for pears with a seven-day harvest interval) or Decis (approved for both apples and pears) and control the sooty mould with Rovral WP. The mould will be removed by the next rain or irrigation application.

Fremontodendron - I suggest an application of Aliette 80WP is given to Fremontodendron plants in August to control aerial Phytophthora that often occurs on the stems. Also include Euphorbia in the spray programme. Increases of this disease can be linked to periods of wet, humid weather.

Pine shoot moth - Remember to apply Toppel 10, Dusrban WG or Gyro now to control grubs. Check for gumming around buds and stunted leader growth.

Moths - Travelling back late at night I have seen really high numbers of moths, which is an indication that we should be vigilant for the types that can attack ornamentals (leopard, swift and tortrix moths among others). Check those plant species that you know are vulnerable, particularly under protection.

Aphids - Are you keeping your aphid populations under control with biological control? Make sure you are using the right predator and check which aphid you are targeting. If you find that you are still not getting good control consider adding Adalia to the crop. This is an ideal product to support an Aphidius programme.

Bark-boring beetles - There are several bark-boring beetles, which all have a similar life cycle. Adults lay eggs from July to October, depending on the season, by boring a small hole under a joint or leaf axil; the eggs then hatch out and bore into the wood. The beetles eat their way out of the tree leaving the tell-tale sawdust marks in the following spring/summer. If you have seen this problem it points to trees that are under stress, as healthy trees rarely seem to contract them. Control adults by spraying Dursban WG on the stem area.

Shot hole - Switch the copper fungicide to Cuprokylt now. The foliage on Prunus subjects is now strong enough to take the more aggressive product. Spray cherries every two weeks to clean up the foliage before leaf drop.

John Adlam is the managing director of Dove Associates


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

Papaver

Papaver

These compact, brightly coloured flowers can be very attractive for impulse sales, notes Miranda Kimberley.

Fertilisers Special Report - invaluable nutrition

Fertilisers Special Report - invaluable nutrition

Using the right fertilisers on your crops can make all the difference when it comes to securing repeat customers, Sally Drury advises.

IPM Essen Show Preview - New look for top trade fair

IPM Essen Show Preview - New look for top trade fair

Venue modernisation will mean better display space for exhibitors at Europe's largest trade fair for the horticulture industry, says Gavin McEwan.


Opinion... Gardening needs better promotion

Opinion... Gardening needs better promotion

British horticultural firms and organisations have not been the best at working together to promote our industry.

Opinion... A wish list for unblinkered thinking

Opinion... A wish list for unblinkered thinking

Opinion... A wish list for unblinkered thinking

Opinion... A wish list for unblinkered thinking

Generations of ordinary British people have been let down by weak, visionless leaders -- politicians more engaged by the next election than our national best interest.


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