Chemical ban raises mite risk

The withdrawal of Bayer CropScience's products containing tolylfluanid will likely leave pear producers with no biological control options for pear leaf blister mite, according to agronomists.

Costly registration restrictions and monitoring processes mean Elvaron Multi, Elvaron WG and Talat will no longer be available.

The move is a potential problem for the top fruit sector, according to HDC tree fruit technical manager Andrew Tinsley. He told Grower: "Elvaron Multi was a useful product for controlling pear leaf blister mite early in the season and for scab control before storage. The decision is a real loss for pear growers. We now have a gap for post-harvest treatments and the only real solution is to rely on manual methods of control - and that's no easy task."

The loss of Elvaron Multi is another step in the continual restriction of chemical products available to the industry, according to crop product specialist HL Hutchinson of Wisbech. Agronomist Nigel Kitney said the lack of Elvaron on the market in the past 18 months had been a major problem.

He said: "It was a good suppressant for a range of problems including rust mite, scab and powdery mildew. The biggest issue now is the control of pear leaf blister mite - there really isn't any other product alternative."

Despite Bayer's commitment to developing new products, it is unclear whether current developments will provide an effective suppressant of pear leaf blister mite.

Bayer campaign manager for horticulture Graham Jenner said: "Elvaron Multi was developed as a fungicide control for botrytis; the mite-suppressant properties were an added bonus.

"We are certainly working on new products for botrytis control. We are also developing a new insecticide that is proving well in controlling a host of pests, including scabs and various mites. Whether it effectively tackles pear leaf blister mite we will have to see."

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