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Orondis® brand fungicides and their best-in-class active ingredient promote plant health from the ground up while combatting key Oomycete diseases like Phytophthora root rot and crown rot in citrus, tree nuts and other labeled perennial crops.
Using oxathiapiprolin as its active ingredient, Orondis® fungicide improves root health and significantly reduces Phytophthora propagule counts and inoculum potential. Orondis can be applied to soil or through irrigation water.
Oxathiapiprolin
Restricted Entry Interval:
PPE required for Applicators, Mixers or Loaders:
PPE required for Early-Entry Workers:
With best-in-class protection against Phytophthora and other soilborne pathogens, Orondis strengthens root systems to improve nutrient and water uptake, boosting plant health and optimizing crop quality and potential yield. Select your crop to see trial results.
Trial Information:
Sweet almond, Nonpareil | US2GTF1092020 | J.A. Adaskaveg | Davis, CA. Inoculations: P.citrophthora, P. niederhauseri, P. cactorum Planted Oct. 2017: Trt: 14-Dec. 2017, 11-Oct. 2018, 24-May 2019, 11-March 2020.
Sweet almond, Nonpareil | US2GTF1092020 | J.A. Adaskaveg | Davis, CA. Inoculations: P.citrophthora, P. niederhauseri, P. cactorum. Planted Oct. 2017: Trt: 14-Dec. 2017, 11-Oct. 2018, 24-May 2019, 11-March 2020.
Sweet almond, Nonpareil | USWC0F0082020 | Famoso, CA. Trt: 25-May 2019; 26-Sept 2019;16-Mar 2020; 17-Sept 2020.
2018 ratings: Sweet almond | Nonpareil ‘Nemaguard’ rootstock | J.A. Adaskaveg | Davis, CA. Inoculations: P.citrophthora, P. niederhauseri, P. cactorum. Planted 2016 | 2 trees/rootstock and 10 replications.
Almond trees planted in February 2025. Both trees inoculated on March 28, 2025, with Phytophthora mediterranea. Photos taken March 2026. Tree on the left was untreated. Tree on the right was treated with 6.4 fl oz/A of Orondis. Trial conducted by the Western Region Innovation Center in Visalia, CA. Trial ID: USWK0F1032025.
Plants treated with Orondis (right) show improved root mass and overall health compared to untreated. Almond Rootbox study in 2015 in Hanford, CA. (All treatments were inoculated at planting.)
Left to right: Untreated check inoculated; treated with Orondis® fungicide at a rate of 0.154 fl oz/A; treated with Orondis at 0.308 fl oz/A (270 trees/A). Citrus trial at the Vero Beach Research Center in FL.
Quantification of viable propagules of P. palmivora in soil at conclusion of trial at the Vero Beach Research Center in FL in 2016.
Phytophthora levels in Orondis plots were reduced to under 10ppg while levels in untreated plots rose by 42.47% within 70 days between samplings. Source: Citrus | CA | 2018.
Citrus ‘Kuharske’ rootstock | USVU0F6212016 | Vero Beach Research Center, FL | 2016.
Source: University of California Riverside | CA | 2016.
Source: USVF0F6212015 | Citrus | FL | 2015.
Untreated pomegranate trees suffering from Phytophthora root rot (left). Healthy pomegranate trees treated with Orondis® fungicide (right). Orondis trial in CA, 2020.
Have questions about this product or need guidance for your operation? Your local Syngenta representative can help you choose the right solution and answer your agronomic questions.
Ready to get started? Connect with a Syngenta retailer near you to purchase this product and get the local support you need for a successful season.
All photos are either the property of Syngenta or are used with permission.
Product performance assumes disease presence.
Performance assessments are based upon results or analysis of public information, field observations and/or internal Syngenta evaluations.
Trial reflects treatment rates commonly recommended in the marketplace.
© Syngenta. Important: Always read and follow label instructions and overtreatment stewardship practices. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. AAtrex 4L, AAtrex Nine-O, Acuron, Agri-Flex, Agri-Mek 0.15 EC, Agri-Mek SC, Avicta 500FS, Avicta Complete Beans 500, Avicta Complete Corn 250, Avicta Duo Corn, Avicta Duo 250 Corn, Avicta Duo COT202, Avicta Duo Cotton, Besiege, Bicep II Magnum, Bicep II Magnum FC, Bicep Lite II Magnum, Callisto Xtra, Denim, Endigo ZC, Endigo ZCX, Epi-Mek 0.15EC, Expert, Force, Force 3G, Force CS, Force 6.5G, Force Evo, Gramoxone SL 2.0, Gramoxone SL 3.0, Karate, Karate with Zeon Technology, Lamcap, Lamcap II, Lamdec, Lexar EZ, Lumax EZ, Medal II ATZ, Minecto Pro, Opello, Proclaim, Voliam Xpress and Warrior II with Zeon Technology are Restricted Use Pesticides.
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