Pyrimethanil 
Action/Use:
- Fungicide
Use:
For gray mold on fruit, ornamentals, vegetables, vines; leaf scab on pome fruit; postharvest on citrus and pome fruit. Luna* Tranquility pending use on pome fruits and small fruits. Distinguish* pending use on almonds, grapes, pistachios, pome and stone fruits, potatoes, strawberries, and tomatoes.
Identification
Common Name(s): Pyrimethanil (BSI, ISO draft.)
Chemistry
Formula: C12H13N3.
Properties: Colorless crystals. Solubility at 20°C: acetone 389 g/l, ethyl acetate 617 g/l, methanol 176 g/l, methylene chloride 1000 g/l, n-hexane 23.7 g/l, toluene 412 g/l.
Mode of Action / Resistance Management
Taget Site: D1: Methionine biosynthesis (proposed)
Mode of Action: Amino acids and protein synthesis
Action Group: FRAC Code 9
Comments / Risk Notes: Medium risk
Registration
U.S.A.: Distinguish* pending.
Global: Luna* Tranquility registration pending 2nd half of 2011-2012.
Environmental Guidelines
Hazards: Fish: LC50 (96 h) 35.4 mg/l (mirror carp), 10.6 mg/l (rainbow trout). Bird: Acute oral LD50 >2000 mg/kg (mallard duck, bobwhite quail); LC50 (5 d) >5200 mg/kg (mallard duck, bobwhite quail). Bee: LD50 (Oral, Contact) >100 µg/bee
Water Solubility: 0.121 g/l at 25°C (pH 6.1)
Safety Guidelines
Toxicity: (Rat): Oral LD50 4150-5971 mg/kg; Dermal LD50 >5000 mg/kg. Inhalation LC50 (Rat): (4 h) >1.98 mg/l
Suppliers and Branded Products
Basic Producers:
Bayer CropScience (Scala*)
Hualong Chemical Industry Co., Ltd. (Donna*)
Janssen PMP (Penbotec*)
Pilar AgriScience (Canada) Corp. (Pilarala*)
Formulators' Trade Names:
Premix Products:
+ Chlorothalonil
- Walabi* — BASF Corporation
+ Fluopyram
- Luna* Tranquility — Bayer CropScience
+ Flutriafol+ Prochloraz
- Rubin* — BASF Corporation
+ Imazalil
- Philabuster* — Janssen PMP
+ Prochloraz+ Triticonazole
- Rubin* TT — BASF Corporation
+ Trifloxystrobin
- Distinguish* — Bayer CropScience
Discontinued Names:
Mythanil*
