Nissan Chemical Industries Limited

Toshihiko Iizuka

Michito Tagawa

Toshiro Miyake

Satoshi Arai

Masatsugu Niizeki

Masao Kuwahara

Hiroshi Haruyama

Toshiyuki Umehara

Sachiko Yajima

A novel crystal protein as an effective ingredient in harmful organism controlling agents, Bacillus thuringiensis var. japonensis strain N141 producing the protein, and a gene coding for the protein. This novel strain produces an insecticidal crystal toxin and is useful for a harmful organism controlling agent.

Bacillus strain and harmful organism controlling agents

A method for protection of a plant from damage caused by an insect pest of the order Lepidoptera and Diptera is disclosed. An insect controlling agent having an active component of an insecticidal crystal toxin produced by Bacillus thuringiensis var. kurstaki No. 145 FERM BP-3905, No. 161 FERM BP-3906, and No. 116 FERM BP-3907 is used in the method for protection of a plant. The insecticidal crystal toxin has a set of molecular weights as determined by 10% SDS-polyacrylamide gel electrophoresis of 125,000 daltons and 60,000 daltons when produced by No. 145, 130,000 daltons and 60,000 daltons when produced by No. 161, and 130,000 daltons and 60,000 daltons when produced by No. 116.

Insect controlling agent from strains of Bacillus thuringiensis var.

The present invention provides novel strains of Bacillus thuringiensis var. Kurstaki, No.145, No.116 and No.161. These strains produce an insecticidal crystal toxin which is useful as an active component in a insect pest-controlling agent.

Bacillus strain and insect pest controlling agent

Growing community of inventors

Sapporo, Japan

Toshihiko Iizuka