Disease control programmes for Brussels sprouts, cabbage, broccoli/calabrese and cauliflower crops.
No disease at T1:
A: Alternative product with different Mode(s) of Action. Follow FRAC guidelines.
Light Leaf Spot
Warm, wet autumns are driving the spread of Light Leaf Spot (LLS: Pyrenopeziza brassicae) to the UK’s prime brassica-growing areas. LLS can severely depress crop quality, yield and revenue – particularly in long-season crops such as Brussels sprouts and storage cabbages.
Control is best achieved with preventative sprays as part of an integrated programme approach: curative applications are much less effective.
If white blister is present, add a specific oomycete curative fungicide, such as Infinito, to control the disease.
Disease at T1:
|Rate of use:||0.4 L/ha||0.36 kg/ha|
|Max number of doses per crop:||3||2|
The first application is recommended before disease establishes in the crop. Follow with further applications of Rudis or Nativo 75WG at a typical spray interval of 21 days. A minimum of 21 days between applications is required when using the same product in a block spray. Apply Nativo 75WG at the end of a programme for lasting crop protection and better storage.
As part of a disease resistance management strategy, Nativo 75WG and Rudis should be used in a fungicide spray programme with other products based on different classes of chemistry.
Brassica leaf spot disease (Alternaria species, Mycosphaerella brassicicola) control:
For control of these diseases or for curative activity against other target diseases, mixing Rudis or Nativo 75WG with an approved sticker/wetter adjuvant may enhance their activity.
White blister (Albugo candida) control:
Nativo 75WG provides useful protection against white blister; for established infections use a specific oomycete curative fungicide such as Infinito (EAMU 20152557). Mix Rudis with an oomycete curative fungicide for control.
Allow to establish before applying Nativo 75WG; there is potential for some growth regulation seen principally as a transient reduction in vigour of young plants.
Nativo 75WG contains trifloxystrobin, a member of the Qol group. In accordance with FRAC guidelines for pre-mix Qol fungicides, the number of applications of Qol-containing products should be no more than 50% of the spray programme.
Rudis contains prothioconazole, a member of the DMI group.
Use Rudis and Nativo 75WG as part of an Integrated Crop Management (ICM) strategy incorporating other methods of control, including where appropriate other fungicides with a different mode of action.