Zorvec Endavia®


Realise unmatched consistency and disease control of late blight (Phytophthora infestans) in potatoes and downy mildew (Peronospora destructor) in onions.

Zorvec Endavia® disease control provides an unrivalled combination of consistency and control to help you grow a better crop, even under the most challenging environmental conditions.

Using Zorvec Endavia delivers two AIs from different fungicide groups, ensuring a robust anti-resistance strategy. Zorvec (oxathiapiprolin) has no known cross resistance from other fungicide groups, while co-formulating Zorvec (FRAC group 49) with benthiavalicarb (FRAC group 40) provides a solid anti-resistance strategy for both molecules. 

Zorvec Endavia® co-formulation is available in a convenient 5L bottle.  


2022 Technical Briefing Video


Protection from stem blight

stem blight control with Zorvec
  • One of the key characteristics of Zorvec® is its strong association with the plant waxes and ability to re-distribute within these waxes. Not only does this give class-leading rainfastness but it ensures great coverage of the plant stem when applied early in the season. This, coupled to the persistent protection offered by Zorvec®, provides class-leading* protection from stem blight.
  • Stem blight can act as a persistent source of re-infection and is commonly considered as a source of spores leading to tuber blight. Therefore improved stem blight control can act to reduce end of season tuber blight.
  • When stems have the green chlorophyll removed, if healthy they turn golden yellow. Stem blight, however, shows as dark stains on these golden yellow stems. The photos below show the relative control of tuber blight from a number of market-leading options

    * Euroblight table March 2018


Ideal at rapid growth phase

Zorvec application growth stages
  • Having demonstrated how effective Zorvec® is at protecting from stem blight and protecting growth that occurs between applications, it can be no surprise that the rapid growth phase is a key positioning for the product.

  • Applied at 10 day intervals, 2 sprays of Zorvec® will effectively replace 3 sprays of an alternative product with a 7 day spray recommendation. If spraying at 7 days suits management practices, Zorvec® can be used in this way and should the weather prevent a repeat application at 7 days, you can rest assured that the consistency of persistent control from Zorvec® will continue to protect the crop for up to 10 days.
  • To optimise the benefits of Zorvec®, a block of two or three sprays can be used to cover the entire rapid growth phase. Based on the persistent protection and curative activity offered by Zorvec® this should ensure a clean crop for the rest of the programme to continue protecting.

    Source: Field-to-lab study, DuPont Stine-Haskell Research Center, USA 2014

Protection of new growth

Zorvec protects new growth
  • Another powerful characteristic of Zorvec® is the ability of the product to re-distribute within the plant waxes. This allows the movement of product from treated to untreated tissue providing protection of growth that occurs between sprays.

  • This was demonstrated by a simple but convincing experiment. The youngest growth of plants in a field was tagged the day before spraying. The field was sprayed and 10 days after spraying, plants were dug up, placed in pots and removed to the glasshouse for inoculation with potato blight. Several days later, when blight symptoms were showing on the ineffective treatments, the growth that had occurred since spraying was identified and assessed for blight symptoms.
  • The diagram below represents the experiment and the graph shows the relative levels of blight control from Zorvec® and two other leading market products. It is clear the ability of Zorvec® to protect the new growth is outstanding.

About Zorvec Endavia®



  • Zorvec Endavia provides unrivalled preventative and curative activity versus potato late blight (P. infestans), moving in the plant to protect new growth and adhering in the cuticle layer to control stem blight in addition to leaf borne late blight. 
  • Using Zorvec Endavia early in the blight programme at rapid growth will ensure best use of Zorvec’s unique properties in protecting stems as well as leaves. Zorvec moves upwards in the xylem, protecting new growth as well as that sprayed directly in the base of the crop.
  • Using 2 x Zorvec Endavia at rapid growth phase of the crop will provide a clean base to a blight programme, and leave up to a further 2 x Zorvec Endavia for use in the stable canopy phase, as determined by blight pressure.


Bulb Onions, Garlic and Shallots

  •  Zorvec Endavia provides unrivalled preventative activity versus downy mildew (P. destructor) in bulb onions, garlic and shallots.
  • Use early in the downy mildew programme to prevent disease establishing in the crop and preserve both yield and quality. 
  • Can be used on all varieties from the 3-leaf stage of growth.
  • Begin at first sight of disease in the crop with Zorvec Endavia at 0.5L/ha, to achieve 7 days protection against onion downy mildew. 
  • Apply a second application of Zorvec Endavia at 0.5L/ha at T1 + 7 days to establish a clean base within the crop, switching to an alternative chemical group for the next 1-2 applications. 
  • Retain the remaining application for use later in the fungicide programme, but be aware of the 28 day PHI. 


  • Garlic

  • Onion

  • Potato

  • Shallot

Technical Specifications

Oil dispersion containing 70 g/l benthiovalicarb and 30 g/l oxathiapiprolin.

Recommended crops:
Bulb Onions, Garlic and Shallots

Target disease:
Potato blight (Phytophthora infestans) in Potatoes
Downy Mildew (Peronospora destructor) in Bulb Onions, Garlic and Shallots

Use rate:

Potatoes: 0.4 L/ha 
Bulb onions, garlic and shallots: 0.5 L/ha

Water volume and spray quality:
Apply in 200 l/ha using a MEDIUM quality spray.

1 hour

Minimum interval between sprays:
7 days

Limit to number of applications:
Maximum of 4 applications per season
Maximum of 3 in a block

Onions, garlic and shallots:
Maximum of 3 applications per season
Maximum of 2 in a block

Harvest interval:
Potatoes: 7 days
Onions, garlic and shallots: 28 days

5 litre


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