Sticky traps fine-tuned to meet challenge of pesticide resistance

Western flower thrips and whitefly "are worldwide pests that have developed resistance to most pesticides", necessitating the development of more effective alternative controls, Keele University pest and disease expert Dr Clare Sampson told the GrowQuip industry event on 26 October.

Optiroll Blue - image: Russell IPM
Optiroll Blue - image: Russell IPM

Sampson, who was last month also appointed horticultural development manager at specialist pest control supplier Russell IPM, has led trials of a range of sticky whitefly traps for the strawberry industry, comparing the effectiveness of different colours, patterns and scents.

Russell IPM’s Yellow Optiroll was found to reduce whitefly numbers on leaves by 84 per cent in February and 67 per cent in April in a commercial crop.

"They have been yellow since 1914," she explained. "A dull orange-yellow catches fewer beneficial insects, and some patterns increase the catch."

Thrips by contrast are attracted to "a specific blue", but reflectance also matters, as "they prefer it shinier than whitefly", she said. "Adding a pheromone, which Syngenta supplied, doubles the catch," while a similar boost came from patterned rolls. "We regularly got a reduction in thrips numbers in plants, and reduced crop damage meant a greater share of class one fruit."

Combined with regular releases of the larvae-devouring mite Neoseiulus cucumeris, "this gives you complete control", she said.

Russell IPM "is developing a biodegradable film but you don’t want that to happen too soon", she added, but admitted: "They are an absolute pain to put up – there’s no way round it."


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 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