27 January - Watch out for pine aphids and mildew

Pine aphid: Dry weather can encourage early aphid populations on leylandii, Chamaecyparis, Cupressus, juniper and Picea spp. Feeding now can cause needle drop later in the summer period. Check vulnerable plants and spray with Aphox (IPM-friendly), Decis or Hallmark WZT (EoA 2008-2944) at this time of year. Use a wetting agent to get good penetration and coverage of these small, hard-to-see, brown aphids, usually found at the branch axils.

Grasses: Check for powdery mildew from now into February. Spray with Nimrod, Stroby WG or Systhane 20EW if required, but avoid frost.

Vine weevil: Overwintering larvae have been found in composts and soils but lower temperatures will help to limit their activity. Composts and soils need to be unfrozen, moist and above 5 degsC for Nemasys L to work effectively. Alternatively, Equity (chlorpyrifos) can be drenched into container-grown or onto field-grown crops at this time of year. Avoid frost before and after application. Check potting dates to see whether compost-incorporated insecticides will still be effective this spring.

Field crops: Make sure that you take a soil analysis of roses, trees and other overwintered field-grown stock before growth starts again. The last week of January can be dry enough to make the first nitrogen top dressing to tree crops. In line with current legislation, consider slow-release nitrogen products such as Novatec, which regulate the nitrogen flow and reduce run-off risk and water pollution.

Bedding plants: Sanitise all of your site's production areas using approved disinfectants such as Jet 5 or Menno Florades before sowing your spring seed crops. Start clean to reduce the risk of early pest and disease attack.

Weed control: Use mild days to apply contact herbicides or products that have residual properties such as Butisan S, Devrinol, Dual Gold, Flexidor 125, products containing lenacil or Springbok. Check HNS project 166 for tolerances. For established woody field-grown crops, consider Artist, Butisan S, Chikara, Devrinol, Flexidor 125, Skirmish or Sumimax (EoA 2008-2881) in good weather conditions. Avoid spraying if heavy rainfall is forecast - herbicides can be washed into the root zone, causing damage.


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

What challenges and opportunities lie in store for tomato growers?

What challenges and opportunities lie in store for tomato growers?

The British Tomato Growers Association (TGA) conference today (21 September) heard a range of perspectives on what changes lie in store for the sector and how to anticipate them.

Buoyant demand for UK apples but frost and labour remain concerns

Buoyant demand for UK apples but frost and labour remain concerns

As the British apple season begins, English Apples & Pears (EAP) is warning that growers will feel the effects of both a late frost in spring and also constrained labour supply.

Tomorrow's tractors

Tomorrow's tractors

These machines have advanced rapidly over recent years but what does the future hold? Sally Drury looks ahead.


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

Professor Geoffrey Dixon

GreenGene International chair Geoff Dixon on the business of fresh produce production
 

Read Professor Geoffrey Dixon