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Common NameDiofenolan
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中文通用名苯虫醚
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IUPACreaction mixture of (2RS,4SR)-4-(2-ethyl-1,3-dioxolan-4-ylmethoxy)phenyl phenyl ether (50%–80%) and (2RS,4RS)-4-(2-ethyl-1,3-dioxolan-4-ylmethoxy)phenyl phenyl ether (50%–20%)
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CAS2-ethyl-4-[(4-phenoxyphenoxy)methyl]-1,3-dioxolane
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CAS No.63837-33-2
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Molecular FormulaC18H20O4
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Molecular Structure
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Category
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ActivityDiofenolan is active against scales and Lepidoptera by ingestion. It inhibits the development of first and second instar larvae in scales and prevents the maturation of eggs and larvae in Lepidoptera. The product is most effective against newly hatched scales. Adult scales treated with diofenolan produce non-viable eggs. Optimum timing of applications for the control of Lepidoptera is at oviposition. Diofenolan can be applied in spring and summer. Residual activity lasting four weeks has been observed following dormant sprays in spring. Higher application rates are required in summer.
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CropUseCrop uses:
citrus, fruits, vines
Citrus
10-20 g ai/hl
Apples
10-20 g ai/hl
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Premix
Type
AI concn
Emulsifiable concentrate (EC)
20% (w/v)
50% (w/v)
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Toxicology
Acute oral (rat)
LD50 >5,000 mg/kg.
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Environmental Profile
Mallard duck
LD50 >2,000 mg/kg
Bobwhite quail
LD50 >2,000 mg/kg
Rainbow trout [96 hrs]
LC50 1,000 mg/litre
Earthworm [14 days]
LC50 204 mg/kg soil
Fate in soil:
Diofenolan binds tightly to soil particles. Its half-life in soil is approximately three days. The potential for leaching to groundwater is low.
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