REVUS FUNGICIDE
- APVMA no.
- 63052
- Registrant
- SYNGENTA AUSTRALIA PTY LTD
- Formulation
- SUSPENSION CONCENTRATE
REVUS Fungicide is a suspension concentrate formulation containing 250 g/L of the active constituent mandipropamid. Engineered for the control of downy mildew, it sits as a core preventative treatment in disease management programmes across Australian viticultural regions and cropping districts, from Sunraysia and the Riverland to the Yarra Valley.
Upon application, the active constituent binds strongly to the plant cuticle, offering rainfastness and translaminar movement across leaf surfaces. This provides durable protection against spore germination and infection, safeguarding active vine canopy and crop foliage during critical growth windows.
Active constituents
- MANDIPROPAMID250 g/L
Registered uses
| Crop | Pest or disease |
|---|---|
| Grape | Downy mildew |
Withholding period
WHP: Grapes: NOT REQUIRED WHEN USED AS DIRECTED. DO NOT GRAZE VEGETATION IN TREATED VINEYARDS OR CUT FOR STOCK FOOD Lettuce Leafy Vegetables: DO NOT HARVEST FOR 1 DAY AFTER APPLICATION DO NOT GRAZE TREATED CROPS OR CUT FOR STOCK FOOD Oilseed Poppies: DO NOT HARVEST FOR 21 DAYS AFTER APPLICATION DO NOT GRAZE TREATED CROPS OR CUT FOR STOCK FOOD
When applied according to label instructions, no harvest withholding period is required for grapes, though a strict prohibition applies against grazing vegetation in treated vineyards or cutting it for stock food. For leafy vegetables and lettuce, a one-day harvest withholding period applies, alongside stock food and grazing restrictions. For oilseed poppies, observe a 21-day harvest withholding period and do not graze or cut treated crops for stock food. Always record all spray applications in your vineyard or farm spray diary.
Mode of action
Mandipropamid belongs to the carboxylic acid amide (CAA) class of chemistry and is classified as a Group 40 fungicide. It inhibits phospholipid biosynthesis and cell wall construction in susceptible oomycete fungi. By interrupting spore germination, mycelial growth, and sporulation, it acts predominantly as a preventative fungicide with strong translaminar mobility across treated leaves.
Resistance management
Mandipropamid is a Group 40 fungicide. Downy mildew populations can develop resistance to CAA fungicides if subjected to continuous single-group selection pressure. To manage resistance risk, always rotate application blocks with effective fungicides from distinct mode-of-action groups (such as multisite protectants or non-Group 40 chemistries). Adhere strictly to seasonal application caps specified on the approved label and avoid consecutive sprays where required by resistance management guidelines.
Tank-mix compatibility
As a suspension concentrate, mandipropamid generally demonstrates broad physical compatibility in standard tank mixtures. However, caution should be exercised when combining with foliar oils, wetters, or emulsifiable concentrates during hot weather or when treating sensitive tender growth, as leaf burn can occur. Always review the tank-mixing directions on the approved label and perform a small-scale jar test to verify physical compatibility prior to filling the spray tank.
Handling and environment
Handle with care and observe standard safety measures during transport, mixing, and application. Wear appropriate personal protective equipment (PPE) as specified on the registered product booklet to protect skin and eyes. Prevent spray drift onto non-target vegetation, waterways, and aquatic habitats. For detailed advice regarding personal safety, environmental precautions, re-entry statements, and spray drift management, consult the approved label attached to the container.
Common questions
- When is the most effective window to apply mandipropamid for downy mildew?
- Mandipropamid is primarily a preventative fungicide. Applications should be scheduled prior to infection events when weather conditions favor disease development, protecting expanding foliage before primary or secondary downy mildew strikes occur.
- How does mandipropamid behave on the leaf surface after spraying?
- Once dry, mandipropamid locks into the waxy layer of the leaf cuticle, providing rainfast properties. It then moves translaminarily through the leaf tissue, extending protection to the lower leaf surface where downy mildew sporangia frequently attempt to invade.
- Why does the harvest withholding period differ between grapes and leafy vegetables?
- Withholding periods are established using crop-specific residue trial data based on harvest methods, foliage structure, and crop metabolism. Grapes do not require a harvest WHP when used as directed, whereas leafy vegetables require a short safety delay before harvest.
- What should I check before mixing this product with oils or surfactants?
- Check the approved label for specific adjuvant recommendations and crop safety warnings. Combining suspension concentrates with oils or heavy wetters during periods of high ambient temperature can risk phytotoxicity on soft foliage, so a jar test and physical inspection are recommended.
- How do I determine the maximum number of sprays permitted in a single block?
- The maximum number of seasonal applications and rules for sequential treatments are determined by resistance management strategies set out on the approved product label. Always refer to the label booklet before planning your seasonal program.