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EPA registration data for Reg. 7969-473 →
Sphaerex is a broad-spectrum Group 3 fungicide used for disease control in various cereal crops, including wheat, barley, oats, rye, and triticale. It contains two active ingredients: metconazole (10.91%) and prothioconazole (18.19%). The product is designed to manage diseases such as black point, powdery mildew, rust, scald, septoria blotch, spot blotch, stagnospora blotch, tan spot, and head scab. It can be applied via ground spray, aerial application, or through field sprinkler irrigation (chemigation) systems. When using chemigation, specific requirements for water systems and injection equipment must be met to prevent contamination. Users should follow strict resistance management practices, such as rotating with other Group 3 fungicides. Handling requires personal protective equipment (PPE), including chemical-resistant gloves, protective eyewear, and long-sleeved clothing. Be aware of potential phytotoxicity, especially when applying in hot or dry conditions or when using certain adjuvants. Always follow the specific application rates and timing instructions provided in the detailed use directions to ensure efficacy and minimize environmental impact.
Pests covered (9)
Black point (kernel blight or smudge)Powdery mildewRustScaldSeptoria blotch, speckled leaf spotSpot blotchStagnospora blotchTan spot (yellow leaf spot)Head scab (head blight)
Areas treatable (1)
wheat, barley, oats, rye, triticale
How to treat each type of area 9
wheat, barley, oats, rye, triticale
| Target pest |
Location |
Rate |
Unit |
Label notes |
| Black point (kernel blight or smudge) |
Outdoor |
4.0 to 5.0 |
fl oz/acre |
early season |
| Powdery mildew |
Outdoor |
|
|
|
| Rust |
Outdoor |
|
|
|
| Scald |
Outdoor |
5.5 to 7.3 |
fl oz/acre |
flag leaf |
| Septoria blotch, speckled leaf spot |
Outdoor |
5.5 to 7.3 |
fl oz/acre |
flag leaf |
| Spot blotch |
Outdoor |
5.5 to 7.3 |
fl oz/acre |
flag leaf |
| Stagnospora blotch |
Outdoor |
5.5 to 7.3 |
fl oz/acre |
flag leaf |
| Tan spot (yellow leaf spot) |
Outdoor |
5.5 to 7.3 |
fl oz/acre |
flag leaf |
| Head scab (head blight) |
Outdoor |
7.3 |
fl oz/acre |
|
Mixing instructions 1
| Label notes |
| Can be applied via ground spray, aerial, or chemigation. |
Worker safety
Re-entry interval (REI)
14
PPE required
Protective eyewear, long-sleeved shirt and long pants, chemical-resistant gloves (nitrile, butyl rubber, neoprene, or polyvinyl chloride), and shoes plus socks.
Timing & weather
- Apply in accordance with disease pressure and weather conditions. Avoid application in hot/dry conditions to prevent phytotoxicity.
Use restrictions 6
- DO NOT apply if final spray solution contains fertilizer > 20% v/v.
- DO NOT apply more than 7.3 fl oz/acre per application.
- DO NOT make more than 2 applications per year.
- DO NOT apply more than 14.6 fl oz/acre per year.
- DO NOT plant certain crops (brassica, etc.) within 30 days after application.
- DO NOT plant other crops sooner than 120 days after application.
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