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Imidacloprid

Adult Bee Toxicity
0.0039 Oral LD50 in µg/bee
Larval Bee Toxicity
4.17 Oral LD50 in µg/bee
Chemical Group
Neonicotinoid
Adult Bee Toxicity
0.0039
Adult Bee Toxicity Group
High
Larval Bee Toxicity
4.17
Persistence Half-Life (days)
254
Persistence Rating
High
Relative Index of Systemic Activity
0.91
Registered Uses (USA)

A wide variety of agricultural uses (>100 different crops) including vegetables, tree fruits, grapes, other fruits, tree nuts, beans, potatoes, corn, soybeans, canola, other oilseeds, wheat, oats, barley, other cereal grains, cotton, sugar beet, peanuts, and other crops. Landcape uses include turf, trees, and landscape plantings. Other uses include nursery uses and non-crop uses, including mosquito control.

Use Categories
Agriculture
Nursery
Landscape
Non-crop
Seed Treatment Use
Yes
Seed Treatment Crops

More than 50 different crops, including: sugar beet, carrot, potato, onion, leeks, scallions, broccoli, soybean, various beans and peas, barley, buckwheat, corn (field, pop, and sweet), millet, oats, rye, sorghum, wheat, triticale, mustard, canola/rapeseed, cotton, sunflower, safflower, peanut, squash, cucurbits, tomato, pepper, and other crops

Further Information

Xylem and phloem-mobile. According to EPA (2016), imidacloprid is absorbed via the roots, stems, and foliage. For certain crops (squash, cucurbits, tomatoes and peppers), seed treatment is allowed only if the plant is destined for export to Mexico. See Gaucho 600 seed treatment registered crops.

Toxicity Reference(s)

U.S. Environmental Protection Agency (EPA). 2016. Preliminary Pollinator Assessment to Support the Registration Review of Imidacloprid. 305 pp. Also, U.S. Environmental Protection Agency (EPA). 2021. ECOTOX User Guide: ECOTOXicology Knowledgebase System. Version 5.3. Available: http:/www.epa.gov/ecotox/

Systemic Reference(s)

U.S. Environmental Protection Agency (EPA). 2016. Preliminary Pollinator Assessment to Support the Registration Review of Imidacloprid. 305 pp. Also, U.S. Environmental Protection Agency (EPA). 2020. Imidacloprid Proposed Interim Registration Review Decision, Case Number 7605. 77 pp.

Persistence Reference(s)

U.S. Environmental Protection Agency (EPA). 2016. Preliminary Aquatic Risk Assessment to Support the Registration Review of Imidacloprid. 219 pp.