This document contains a list of fungicides registered for control of potato late blight in Wisconsin. In-furrow and seed treatment registrations are omitted. Not a comprehensive list. Most fungicides listed are for use in conventional systems. Where generic fungicide trade names are listed, there may be numerous.
List of Registered Fungicides:
| Trade Name | Rate/acre | Active Ingredient(s) | PHI | REI | FRAC# | Activity of Fungicide | Comments |
|---|---|---|---|---|---|---|---|
| Agri Tin, Super Tin 4L, Super Tin 80WP | 4-6 fl oz | triphenyltin hydroxide | 7 days | 48 hours | 30 | Protectant; kills spores on contact | Restricted use pesticide. 3 fl oz rate can be used if material is tank-mixed with another fungicide. |
| Alude | 1.25 qt in 90 gal water | mono and dipotassium salts of phosphorous acid | 0 days | 4 hours | 33 | Upregulates resistance/disease protection in plant | Foliar application. Use higher rate when disease pressure is severe. Do not apply at less than 3 day intervals. Do not apply to plants that are dormant or that are heat or moisture stressed. |
| Confine Extra | 3-5 qt in 20 gal water | ||||||
| K-Phite 7LP | 1-3 qt in 10 gal water | ||||||
| Ariston | 2 pt | chlorothalonil + cymoxanil | 14 day | 12 hours | M5+27 | Protectant and locally systemic | Additional chlorothalonil may be tank-mixed with this formulation to enhance % active ingredient applied (be sure to include the Ariston component in overall season total). Cymoxanil is Curzate. |
| Elixir | 1.2 to 2.0 lb | mancozeb + chlorothalonil | 7 days | 24 hours | M3+ M5 | Protectant | Use higher rate as vines increase in size. |
| Fosphite, Rampart | 1 to 4 qt | potassium phosphite | 0 days | 4 hours | 33 | Upregulates resistance/disease protection in plant | Foliar post-emergence spray and post harvest spray for control in storage. Apply in at least 20 gal water/acre. |
| Fungi-Phite | Foliar: 2 qt/A Seed trt: 15% vol to vol-2 ton in 1 gal solution |
potassium phosphite | 0 days | 4 hours | 33 | Upregulates resistance/disease protection in plant | Seed piece spray and foliar post-emergence spray. Tank-mix with another effective fungicide is recommended and use high label rate for late blight control. |
| Helena Prophyt | 4 pt/acre | ||||||
| Badge SC | 1 to 3 pt | copper hydroxide, copper oxychloride | 0 days | 24 hours | M1 | Protectant | Protectant activity only. Apply at 7 to 10 day interval. |
| Bravo Ultrex | .7 then .9-1.36 lb | chlorothalonil | 7 days | 12 hours | M5 | Protectant | 11.25 lb a.i./acre maximum on standard label. However, WI has a special 24(c) registration for long season potatoes extending the max a.i. from 11.25 to 16 lb a.i./acre with Bravo (Syngenta) and Echo (Sipcam Advan) formulations. |
| Bravo WeatherStik, Echo 720, Equus 720 SST, Initiate 720, Chlorothalonil 720 SC, Chloronil 720, Praiz | .75 then 1-1.5 pt | ||||||
| Bravo Zn, Equus 500 Zn, Initiate Zn | 1 1/8 then 1.5 to 2.25 pt | ||||||
| Echo Zn | 1 to 2.125 pt | chlorothalonil | 7 days | 12 hours | M5 | Protectant | 11.25 lb a.i./acre maximum on standard label. However, WI has a special 24(c) registration for long season potatoes extending the max a.i. from 11.25 to 16 lb a.i./acre with Bravo (Syngenta) and Echo (Sipcam Advan) formulations. |
| Equus DF | .7 then .9 to 1.36 lb | ||||||
| Echo 90DF | 5/8 then 7/8 to 1.25 lb | ||||||
| Cabrio Plus | 2.9 lb | pyraclostrobin+ metiram | 3 days | 24 hours | 11+M3 | Locally systemic and protectant | 17.4 lb/acre maximum per season. Do not apply more than 2 sequential applications. |
| Champ WG | 1 to 1.5 lb (3 to 4 lb if severe) | copper hydroxide | 0 days | 24 hours | M1 | Protectant | Use high label rates for foliar late blight protection. |
| Champ Formula 2 Flowable | 2/3 to 2 2/3 pt | ||||||
| Champ DP Dry Prill | 2/3 to 1 lb | ||||||
| Kentan DF | 1 to 2.5 lb (4 lb if severe) | ||||||
| Kocide 2000 | .73 to 3 lb | ||||||
| Kocide 3000 | .5 to 1.75 lb | ||||||
| Nu-Cop 3L | 2/3 to 2 pt (2 to 4 pt if severe) | ||||||
| Nu-Cop 50DF | 1 to 1.5 lb (3 to 4 lb if severe) | ||||||
| Previsto | 1 to 3 qt | ||||||
| C-O-C-S WDG | 1.5 to 4 lb | copper oxychloride, basic copper sulfate | 0 days | 24 hours | M1 | Protectant | Use high label rates for foliar late blight protection. |
| Cuprofix-Ultra 40 Disperss | .75 to 3 lb | ||||||
| Mastercop | .5 to 1.5 lb | copper sulfate pentahydrate | 0 days | 24 hours | M1 | Protectant | Use high label rates for foliar late blight protection. |
| Cueva | 2 gal in 50-100 gal water | copper octanoate | 0 days | 24 hours | M1 | Protectant | Use high label rates for foliar late blight protection. |
| Curzate 60DF | 3.2 oz foliar | cymoxanil | 14 days | 12 hours | 27 | Locally systemic | Locally-systemic fungicide. Must be tank-mixed with a protectant fungicide. Rainfast within 2 hours. Cymbol. |
| Dithane F45 Rainshield | .4 to 1.6 qt | mancozeb | 24 hours | 3 days | M3 | Protectant | Max rate per acre/season is 11.2 lb a.i. Begin use at lower rate and increase as vines increase in size. |
| Dithane M45 | .5 to 2 lb | ||||||
| Koverall, Roper DF Rainshield, Fortuna 75WDG | 1 to 2.0 lb | ||||||
| Evito 480SC, Aftershock | 3.8 fl oz | fluoxastrobin | 7 days | 12 hours | 11 | Locally systemic | Follow label for resistance management. |
| Forum | Foliar and tuber control: 6 oz | dimethomorph | 4 days | 12 hours | 40 | Systemic | May be tank-mixed with another effective fungicide for enhanced management – but not required by label. Addition of an adjuvant may enhance management. Can be applied after vine kill. |
| Gavel 75DF | 1.5 to 2 lb | zoxamide + mancozeb | 3 days | 48 hours | 22+M3 | Protectant | Do not make >6 applications/crop. Contact fungicide. |
| Gem 500SC | 3.8 fl oz | trifloxystrobin | 7 days | 12 hours | 11 | Locally systemic | Follow label for resistance management. |
| Headline | 6 to 12 fl oz | pyraclostrobin | 3 days | 12 hours | 11 | Locally systemic | Follow label for resistance management. |
| ManKocide | 1.5 to 2 then 4-5 lb | mancozeb + copper hydroxide | 3 days | 24 hours | M3+ M1 | Protectant | Not labeled as a seed trt for potatoes. |
| Omega 500F | 5.5 fl oz | fluazinam | 14 days | 48 hours | 29 | Protectant | REI is 4 days for high exposure activities. New special local need label 24c in April 2011. |
| Omega Top MP | 5.5 fl oz – individual label for Omega sold in co-pack with Top MP difenoconazole | fluazinam | 14 days | 48 hours | 29 | Protectant and locally systemic | Can be applied aerially. REI is 4 days for high exposure activities. |
| Orondis Ultra | 5.5 to 8.0 fl oz | oxathiapiprolin + mandipropamid | 14 days | 4 hours | U15 | Translaminar or systemic within leaf and xylem mobile; rainfast within 30 minutes | Max single application rate is 8.0 fl oz/A. Max annual rate is 32.0 fl oz/A/year. Do not apply >0.125 lb ai/year of oxathiapiprolin. Do not apply >0.522 lb ai/year of mandipropamid. Make no more than 2 sequential applications before rotating to a different mode of action. Do not follow soil applications of oxathiapiprolin with foliar applications of Orondis Ultra. |
| Orondis Opti | 1.75 to 2.50 pt | oxathiapiprolin + chlorothalonil | 7 days | 12 hours | U15 + | Translaminar or systemic within leaf and xylem mobile; rainfast within 30 minutes | Max single application rate is 2.5 pt/A. Max application annual rate is 10 pt/A/year. Do not apply >0.125 lb ai/A/year of oxathiapiprolin. Do not apply >11.25 lb ai/A/year of chlorothalonil. |
| Oxidate | 40 to 120 fl oz to 100 gal water, 30-100 gal/acre | hydrogen dioxide | 0 days | 1 hour | NC | Kills spores on contact and no residual protectant activity after treatment | Foliar spray for late blight. Frequent applications (5-day intervals) can limit sporulation. |
| Penncozeb 80WP, Penncozeb 75DF | .5 to 2 lb | mancozeb | 3 days | 24 hours | M3 | Protectant | Do not exceed 11.2 lb a.i./acre/year. |
| Penncozeb 4FL, Manzate flowable | .4 to 1.6 qt | ||||||
| Manzate Pro-Stick | 1 to 2 lb, seed trt: 1.25 lb/50 gal water | ||||||
| Phostrol | 2.5 to 10 pt Post harvest trt: 1 gal/ton in .5 gal water |
mono- and di-basic sodium, potassium, and ammonium phosphites | 0 days | 4 hours | 33 | Upregulates resistance or plant defense | Can be applied as a foliar for late blight, pink rot, and Pythium leak. Can be applied post-harvest for storage disease control. |
| Polyram 80DF | 1.5 to 2 lb in 15 gal water/acre minimum | metiram | 3 days | 24 hours | M3 | Protectant | Metiram is an EBDC, like mancozeb (M3). Total amount of a.i. per year/acre must include all EBDCs. |
| Previcur Flex | .7 to 1.2 pt | propamocarb hydrochloride | 14 days | 12 hours | F | Systemic antisporulant | Apply in a tank-mix with effective protectant. Can be applied as a broadcast or banded application over the row, post-emergence. |
| Priaxor | 4-8 fl oz | fluxapyroxad + pyraclostrobin | 7 days | 12 hours | 7+11 | Protectant and locally systemic | Cannot apply more than 3 applications/season. Follow label for resistance management. Xemium and Headline pre-mix. |
| Quadris, Satori, Willowood Azoxy 2SC, Aframe, Equation SC | 6 to 15.5 fl oz | azoxystrobin | 14 days | 4 hours | 11 | Locally systemic | Alternate away from Group 11 fungicides to manage resistance. |
| Trevo, Azoxystrar, Azoxyzone | 6 to 20 fl oz | ||||||
| Quadris Opti | 1.6 pt | azoxystrobin + chlorothalonil | 14 days | 12 hours | 11+M5 | Locally systemic and protectant | Alternate away from Group 11 fungicides to manage resistance. |
| Ranman | 1.4 to 2.75 fl oz | cyazofamid | 7 days | 12 hours | 21 | Protectant | Follow label for resistance management. |
| Reason | 5.5 to 8.2 fl oz | fenamidone | 14 days | 12 hours | 11 | Locally systemic | Follow label for resistance management. |
| Revus Top | 5.5 to 7 fl oz | mandipropamid + difenoconazole | 14 days | 12 hours | 40+3 | Locally systemic and contact | Addition of an adjuvant is recommended. |
| Tanos | 8 to 10 oz | cymoxanil + famoxadone | 14 days | 12 hours | 27+11 | Locally systemic and contact | Must be tank-mixed with an effective protectant fungicide. Good protectant for limiting leaf blight. Excellent curative. |
| Ridomil Gold SL | 1 to 2 pt | mefenoxam | 14 days | 48 hours | 4 | Systemic | Do not apply beyond the at-planting stage. |
| Ridomil Gold Bravo SC | 2.5 pt | mefenoxam + chlorothalonil | 14 days | 48 hours | 4+M5 | Systemic and protectant | Follow label for resistance management. |
| Ridomil Gold Copper | 2 lb | mefenoxam + copper hydroxide | 14 days | 48 hours | 4+M1 | Systemic and protectant | Tank-mix with an effective protectant. |
| Ridomil Gold MZ WG | 2.5 lb | mefenoxam + mancozeb | 3 days | 48 hours | 4+M3 | Systemic and protectant | Follow label for resistance management. |
| Zampro | 11 to 14 fl oz | ametoctradin + dimethomorph | 4 days | 12 hours | 45+40 | Systemic and protectant | Do not make more than 2 sequential applications. Follow label for resistance management. Ametoctradin is new a.i.; dimethomorph is Forum (formerly Acrobat). |
| Zing! | 32 to 34 fl oz | zoxamide + chlorothalonil | 7 days | 12 hours | 22+M5 | Protectant | Do not make more than 2 sequential applications before alternating with another fungicide of a different mode of action. Do not make >8 applications or apply >1.52 lb of zoxamide and 8.88 lb of chlorothalonil per season per acre. |