Zorvec Entecta™

To reduce the potential risk of resistance within the UK and Ireland, Corteva have issued the following application advice for the potato ware crop;

• Apply Zorvec products strictly in alternation with effective chemistry having a different mode of action, other than CAA (benthiavalicarb, mandipropamid, dimethomorph)
• The post-Zorvec application interval to the following non-Zorvec containing spray should not exceed 7 days.
• In curative situations (disease evident or confirmed in local area) Zorvec co-formulations should be applied in tank-mix with a partner fungicide containing a curative active ingredient e.g. cymoxanil or propamocarb.​
• Sprays containing Zorvec should not exceed 20% of the total number of sprays applied to the crop – two sprays per crop if the expected programme is less than 15 sprays.
• A single crop should not receive more than 3 sprays containing Zorvec products.
• Whilst still available, tank-mixing Zorvec products with mancozeb is recommended.

For seed crops (incl home-saved seed) the following must also be observed;

• Zorvec applications must always be applied with a full rate of a curative fungicide e.g. cymoxanil.
• A single crop should not receive more than 2 sprays containing Zorvec products and these 2 sprays should not exceed 20% of the total late blight programme.