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."