spirodiclofen (New)
Acaricide
NOMENCLATURE
Common name spirodiclofen (BSI, pa ISO)
IUPAC name 3-(2,4-dichlorophenyl)-2-oxo-1-oxaspiro[4.5]dec-3-en-4-yl 2,2-dimethylbutyrate
Chemical Abstracts name 3-(2,4-dichlorophenyl)-2-oxo-1-oxaspiro[4.5]dec-3-en-4-yl 2,2-dimethylbutanoate
CAS RN [148477-71-8] Development codes BAJ2740
PHYSICAL CHEMISTRY
Mol. wt. 411.3 M.f. C21H24Cl2O4 Form White powder. V.p. 3 ?10-4 mPa (20 癈) KOW logP = 5.8 (pH 4, 20 癈) Solubility In water 50 mg/l (pH 4, 20 癈).
COMMERCIALISATION
History Reported by U. Wachendorff et al. (Proc. Br. Crop Prot. Conf. - Pests Dis., 2000, 1, 53) and under development by Bayer AG. Manufacturers Bayer
APPLICATIONS
Mode of action Interferes with mite development. Uses Under development for control of mite pests such as Panonychus spp., Phyllocoptruta spp., Brevipalpus spp., and Aculus and Tetranychus species, at 50-200 g/1000 l. For use in citrus, pome fruit, stone fruit, grapes and nuts. Formulation types SC; WG. Selected tradenames: 'Envidor' (Bayer)
MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for male and female rats >2500 mg/kg. Skin and eye Acute percutaneous LD50 for male and female rats >2000 mg/kg. Non-irritating to skin and eyes (rabbits). Not a skin sensitiser (SC formulation, guinea pigs). Inhalation (4 h) for rats >5000 mg/m3. NOEL NOAEL (12 mo) for dogs 50 ppm. Other No teratogenic potential (rats and rabbits); 2-generation rat study revealed no evidence of a primary reprotoxic potential; no evidence of genotoxic or mutagenic potential.
ECOTOXICOLOGY
Birds Acute oral LD50 >2000 mg/kg. Fish LC50 (96 h) >68 mg a.i. (as 240SC)/l Daphnia EC50 (48 h) >100 mg a.i. (as 240SC)/l Bees LD50 (oral and contact) >300 mg/bee. Worms LC50 for Eisenia foetida >1000 mg/kg dry soil. Other beneficial spp. Non-toxic to ladybirds (Coccinella septempunctata) at 300 g/ha. Slightly harmful to predatory mites under field conditions (240SC; IOBC scale). No negative effect on microbial mineralisation.
ENVIRONMENTAL FATE
Soil/Environment DT50 in soil 0.5-5.5 d. No leaching problem (lysimeter study). |
