Bacillus Thuringiensis (5801)

Bacillus thuringiensis (Bt) are aerobic, spore-forming, rod-shaped bacteria that form crystals of protein called delta-exotoxins. Several different types of exotoxins are produced by two B. thuringiensis subspecies and their various strains which, when ingested, damage the stomach wall of Lepidoptera larvae. These types of exotoxins are produced in varying proportions by the different strains and are formulated for use in tree fruits. B. thuringiensis subsp. aizawai products include Agree and XenTari. B. thuringiensis subsp. kurstaki products include Biobit, Condor, Crymax, Dipel, Javelin, MVP, and Thuricide. MVP is unique in that it consists of delta-exotoxins encapsulated in killed Pseudomonas fluorescens to extend field efficacy.

For more information: PA Tree Fruit Production Guide 

Penn State Entomology Dept.

For more information on this subject, Please visit the College of Agricultural Sciences Publications Web site.

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