AP General Use Recommendations

(page updated Feb. 2019, no changes to 2018)

The purpose of the use guidelines for AP containing products is to maintain the sensitivity in the target pathogens and to prevent crop losses due to resistant pathogen populations.

  • Where different AP-containing products are used in one season, the cumulative number of applications with cyprodinil-, pyrimethanil- or mepanipyrim-containing products must not exceed the maxima as mentioned below.
  • For sound resistance management, good agricultural practices, including phytosanitary measures and crop protection, should be followed not only in commercial practice, but also in nurseries.

Botrytis Guidelines:

  • Where up to three treatments are made per season, the number of applications of AP-containing products is limited to one.
  • In situations where four to six Botrytis treatments are made per crop and season, a maximum of two applications with AP-containing products are recommended.
  • In specific situations where seven or more Botrytis treatments are required per crop and season, a maximum of three applications with AP-containing products is recommended and not more than two consecutive applications.
  • For specific crops and products, follow use recommendations of individual companies.

Venturia Guidelines:

  • Apply a maximum of four AP-containing products per season.
  • In locations where resistance has been reported, use APs only in mixture with an effective non-cross-resistant scab fungicide.
  • Individual products should always be used at recommended dose rates and during the period when they are most effective.
  • Curative use only in conjunction with reliable scab warning systems.

For a printer friendly version of these use recommendations, please refer to the most recent Minutes in the table below (PDF-document, last pages).

Monitoring Results and Recommendations

At the annual meeting, the working group reviews the current year's monitoring results and decides whether they require changes be made to the next year's use recommendations.  The minutes of those meetings are below.




Dr. Andreas Mehl

Bayer AG, Crop Science Division
Alfred-Nobel-Str. 50,
Building 6240
D-40789 Monheim

Tel: 49-2173-383797