A species of Burkholderia sp with no known pathogenicity to vertebrates but with pesticidal activity (e.g., plants, algae, arachnids, insects, fungi, weeds and nematodes) as well as methods for controlling algae using said species of Burkholderia. 5 Also provided are natural products derived from a culture of said species and methods of controlling algae and/or arachnids using said natural products.一種伯克氏菌種,已知對脊椎動物並無致病性,但具有殺蟲活性(如植物、藻類、蛛形綱動物、昆蟲、真菌、雜草和線蟲),以及可藉由伯克氏菌種控制藻類的方法。也提供有來自此菌種的培養液和使用天然產物控制藻類和/或節肢動物的方法。