These recommendations are crop (and disease) specific recommendations which should be used in ADDITION to the general use recommendations to manage resistance development. These are excerpted from the minutes of annual meeting of the WG.

QoI Guidelines: Cucurbits

(no changes in Jan. 2017 compared to previous recommendations)

  1. Apply QoI fungicides according to manufacturer's recommendations for the target disease (or complex) at the specific crop growth stage indicated. Effective disease management is a critical parameter in delaying the build-up of resistant pathogen populations.
  2. Apply a maximum of 3 QoI fungicide sprays per crop
  3. Use a maximum of 1 QoI fungicide spray out of every three fungicide applications.
  4. Do not use consecutive applications of QoI fungicides.
  5. Apply QoI fungicides in alternation with fungicides from a different cross-resistance group with satisfactory efficacy against the targeted pathogen(s).
  6. Continue QoI fungicide alternation between successive crops.

QoI Guidelines: Greenhouse grown non-cucurbit vegetables

(no changes in Jan. 2017 compared to previous recommendations)

  1. Apply QoI fungicides according to manufacturer's recommendations for the target disease (or complex) at the specific crop growth stage indicated. Effective disease management is a critical parameter in delaying the build-up of resistant pathogen populations.
  2. Use a maximum of 1 QoI fungicide spray out of every 3 fungicide applications.
  3. Do not use consecutive applications of QoI fungicides.
  4. Apply QoI fungicides in alternation with fungicides from a different cross-resistance group with satisfactory efficacy against the targeted pathogen(s).
  5. Continue QoI fungicide alternation between successive crops.

QoI Guidelines: multiple spray crops (non-cucurbit field vegetables and ornamentals)

(no changes in Jan. 2017 compared to previous recommendations)

  1. Apply QoI fungicides according to manufacturers recommendations for the target disease (or complex) at the specific crop growth stage indicated. Effective disease management is a critical parameter in delaying the build up of resistant pathogen populations.
  2. Observe spray limitations in the spray guideline table shown below for programs utilizing 12 or fewer fungicide sprays per crop.

Spray guideline table:

Total number of spray applications per crop

1

2

3

4

5

6

7

8

9

10

11

12

>12

Maximum recommended solo QoI fungicide sprays

1

1**

2**

2

2

2

2

3

3

3

3

4

*

Max. recommended QoI fungicide sprays in mixture

1

2

2

2

2

3

3

4

4

5

5

6

*

Table Footnotes:

* When more than 12 fungicide applications are made, observe the following guidelines:

  • When using a QoI fungicide as a solo product, the number of applications should be no more than 1/3 (33%) of the total number of fungicide applications per season.
  • For QoI mixes in programs in which tank mixes or premixes of QoI with mixing partners of a different mode of action are utilized, the number of QoI containing applications should be no more than ½ (50%) of the total number of fungicide application per season.
  • In programs in which applications of QoI are made with both solo products and mixtures, the number of QoI containing applications should be no more than ½ (50%) of the total number of fungicide applied per season.

** Mixtures are preferred

For a printer friendly version of these use recommendations see section 2.2.2.7, 2.2.2.8, and 2.2.2.9 pp. 16-17  of Minutes of the 2016 QoI Meeting, Recommendations for 2017.

NEWS

Contact

Helge Sierotzki
Interim Chair

Syngenta Crop Protection Münchwilen AG 
WST540.1.94 
CH-4332 Stein

Tel : +41 62 866 01 80 
Fax: +41 62 866 07 63

E-Mail: Helge Sierotzki