Has Bacillus sphaericus been registered as an EPA pesticide active ingredient?

Bacillus sphaericus carries EPA pesticide registration across six commercial products, establishing it as a federally registered microbial active ingredient in the United States. All six registrations list the same strain: 2362, Serotype H5a5b, also designated strain AML614 — so anyone researching Bacillus sphaericus EPA registration or strain 2362 pesticide status will find a consistent record.

Clarke Mosquito Control Products holds three of those registrations: Am61432 Primary Powder (EPA Reg. 8329-121), Am61432 50G (8329-122), and Am61432 WP (8329-123). The remaining three are Fourstar-branded products — Fourstar Briquets (83362-3, registrant B2e Microbials), Fourstar CRG (85685-2), and Fourstar MBG (85685-3), the latter two from Fourstar Microbial Products.

For formulators, distributors, or regulatory reviewers asking whether Bacillus sphaericus is EPA-approved as a pesticide active ingredient, the registration record is unambiguous: six distinct products across multiple registrant companies, all citing Serotype H5a5b, strain 2362, AML614 as the active organism.