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Acephate

Adult Bee Toxicity
>0.23 Oral LD50 in µg/bee
Larval Bee Toxicity
Unknown Oral LD50 in µg/bee
Chemical Group
Organophosphate
Adult Bee Toxicity
>0.23
Adult Bee Toxicity Group
Non-definitive
Larval Bee Toxicity
Unknown
Persistence Half-Life (days)
3
Persistence Rating
Low
Relative Index of Systemic Activity
1.52
Registered Uses (USA)
A variety of agricultural uses including vegetables, tree fruits, other fruits, tree nuts, beans, cotton, peanuts, soybean, citrus, tobacco, and other crops. Landscape uses include turf, trees, and landscape plantings. Other uses include nursery uses and non-crop uses.
Use Categories
Agriculture
Nursery
Landscape
Non-crop
Seed Treatment Use
Yes
Seed Treatment Crops

cotton, peanut

Further Information

Xylem-mobile. According to Cranshaw (n.d.), acephate is systemic when applied foliarly and when trunk injected; soil systemic activity is being evaluated. Acephate converts to methamidophos within plants then translocates upward. Methamidophos has similar adult acute oral toxicity to acephate (0.22 µg/bee). Plant residues may be more persistent than soil residues.

Toxicity Reference(s)

Lewis, K.A., J. Tzilivakis, D. Warner, and A. Green. 2016. An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal 22(4):1050-1064.

Systemic Reference(s)

U.S. Environmental Protection Agency (EPA). 2017. Preliminary Ecological Risk Assessment for Registration Review of Acephate. 218 pp. Also, Cranshaw, W. n.d. “Management Recommendations for Insect Pests of Trees and Shrubs.” XCM-38. Colorado State University.

Persistence Reference(s)

Lewis, K.A., J. Tzilivakis, D. Warner, and A. Green. 2016. An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal 22(4):1050-1064.

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