Science Into Practice - Thrips control in strawberries

Western flower thrips (WFT) has been a causing serious financial loss in everbearer strawberry crops for more than 10 years and the HDC has funded three research projects to find practical solutions.

One of these, a recent Defra Horticulture LINK project led by East Malling Research, highlighted good crop hygiene, early introduction of large numbers of predatory mites (Neoseiulus cucumeris) and the use of blue roller traps positioned along polythene tunnel legs as important methods for gaining control.

In an additional study in 2014, HDC-funded entomologist Clare Sampson of the University of Keele surveyed strawberry-producing businesses that are failing to gain adequate control of WFT and compared them with businesses that are successfully controlling the pest.

The results showed that control was most successful on one-year-old crops where well-maintained regular predator release strategies were employed from or before first flower, using N. cucumeris combined with Stratiolaelaps scimitus (formerly Hypoaspis miles) and/or Orius species and blue sticky roller traps. In each case, crop-protection spray programmes that are harmful to predators were avoided.

Control was found to break down where there was a large carry-over of thrips from the previous season, predators were released too late, insufficient N. cucumeris were released early in the season and crop-protection products that harm predators were used when predatory mites were being released or during their establishment.

The full project report can be found on the publication page of the soft-fruit section of the HDC website.

Horticultural Development Company

For details on all HDC activity, visit www.hdc.org.uk


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

Pest & Disease Management - Nursery hygiene

Pest & Disease Management - Nursery hygiene

How to create an effective hygiene programme that will support profitable growing.

Pest & Disease Factsheet - White mould

Pest & Disease Factsheet - White mould

Sclerotinia sclerotiorum, S. minor and S. trifoliorum particularly affecting legumes such as green, broad and faba beans.

Biocontrols - market growing rapidly as regulations tighten

Biocontrols - market growing rapidly as regulations tighten

Manufacturers are developing new biological pest controls for growers facing more stringent regulations and customer demands, Gavin McEwan reports.