What does the published scientific research say about Bacillus sphaericus?

Eight PubMed articles indexed here examine Bacillus sphaericus — also reclassified and studied as Lysinibacillus sphaericus — across plant growth promotion, biological nitrogen fixation, biocontrol of phytopathogenic fungi, and mosquito vector control. The literature covers both its agricultural plant-input potential and its well-documented use as a biolarvicide.

In a two-year Alabama bermudagrass hay trial, a PGPR blend containing B. sphaericus strain AP282 with half-rate nitrogen fertilizer matched the forage biomass and quality of a full nitrogen treatment, while all PGPR treatments increased soil microbial respiration over time, as reported in peer-reviewed research (PMID 37110285). A separate field study of young oil palm found that inoculation with B. sphaericus UPMB-10 contributed roughly 63% of plant nitrogen uptake through biological N₂ fixation, potentially reducing inorganic fertilizer inputs during early cultivation (PMID 22446306).