Serpent

Manufacturer
BASF
Category
Fungicides
Registered until
2026-07-31
Registration number
17427
Active materials
Links
An emulsifiable concentrate containing 150 g/litre (14.6 % w/w) pyraclostrobin and 75 g/litre (7.3 % w/w) fluxapyroxad.
A protectant and systemic fungicide for use in winter barley and spring barley.
 
DIRECTIONS FOR USE
 All instructions within this section must be read carefully in order to obtain safe and successful use of this product. Serpent is a protectant and systemic fungicide for use in winter barley and spring barley. When applied for disease control this product may increase green leaf area retention of barley.
 
Restrictions/Warnings
Extreme care must be taken to avoid drift onto nearby crops. When applied to barley intended for malting, refer to the rate and latest timing restrictions for fluxapyroxad and pyraclostrobin given by the British Beer and Pub Association. No more than two applications of any QoI fungicide may be made to crops of barley. You must not apply more than two foliar applications of products containing complex II inhibitors (SDHIs) to any cereal crop. After spraying, wash out sprayer thoroughly according to manufacturer’s guideline and dispose of washings and clean containers according to DEFRA Code of Practice and local authority guidelines.
 
Disease Control
Serpent is a protectant and systemic fungicide for the control of a range of diseases in winter barley and spring barley as summarised below:
WINTER BARLEY
Disease: Yellow rust
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Brown rust
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Rhynchosporium
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Net blotch
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Ramularia
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Powdery mildew 
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:MC
 
SPRING BARLEY
Disease: Yellow rust
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Brown rust
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Rhynchosporium
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Net blotch
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Ramularia
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:C
 
Disease: Powdery mildew
Rate:Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Critical Comments:MC
 
(C = Control MC = Moderate Control)
When applied for disease control this product may increase green leaf area retention of barley.
 
Resistance management
Serpent should be used in accordance with the instructions for use for the target diseases at the specific growth stages indicated. Use Serpent 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. Serpent contains pyraclostrobin, a member of the QoI cross resistance group. Serpent should be used preventatively and should not be relied upon for its curative potential. You must not apply more than two foliar applications of QoI containing products to any cereal crop.
Strains of barley powdery mildew resistant to QoIs are common in the UK.
Serpent contains fluxapyroxad which belongs to the SDHI (carboxamide) complex II inhibitor group of fungicides.
To minimise the risk of resistance occurring, apply a maximum of two SDHI fungicide sprays to any cereal crop.
Visit the FRAG-UK website for further advice on resistance management of cereal fungicides.
 
Crops
Serpent is a protectand and systemic fungicide for use in winter barley and spring barley.
Time of Application
Apply Serpent at the start of foliar disease attack. A maximum of two applications can be made up to and including flowering just complete in, winter and spring barley. Earliest timing for first application: BBCH 25 Earliest timing for second application: BBCH 30
Rate of Application
Apply 1.5 litres of Serpent per hectare in 150 to 300 litres of water per hectare.
Qualified recommendation
Serpent may be applied at 1.5 litres per hectare in 100 litres water per hectare, although efficacy at this reduced volume has not been evaluated. Therefore application at 100 litres water per hectare is at user’s risk with regard to biological efficacy
 
Following crops
After treating a cereal crop with Serpent, cabbage, carrot, clover, dwarf French beans, field beans, lettuce, maize, oats, oilseed rape, onions, peas, potatoes, ryegrass, sugar beet, sunflowers, barley and wheat may be sown as the following crop. The effect of Serpent on other following crops has not been assessed.
 
Mixing and Spraying
Apply as a MEDIUM spray, as defined by BCPC. Half fill the spray tank with clean water and start the agitation. SHAKE THE CONTAINER WELL before use and pour in the required amount of product. Rinse any empty containers thoroughly and add rinsings to the spray tank. Add the remainder of the water and continue agitation until spraying is completed. When tank mixes are to be used, each product should be added separately to the spray tank, taking due note of any instructions given as to the order of mixing.
 
Registered for culturesRateBBCH
Spring barley1.5 l25 - 69
Winter barley1.5 l25 - 69