Bacillus thuringiensis (Bt)

LIST OF CONTENTS• Introduction• Discovery• Crystalline Inclusion Bodies• Action of microbial insecticide• Conclusion

INTRODUCTION

• B. thuringiensis is a Gram-positive soil bacterium

• Modes of Nutrition Saprophytic Parasitic

PHOTOGRAPH OF Bt

DISCOVERY

• In Japan in 1901 by Shigetane Ishiwata

flacherie,a disease of silkworm caused by Bt

CONTINUED…

• Since 1920s Spores and crystalline insecticidal protein for pest control

• 1996 transgenic crop plants

CRYSTALLINE INCLUSION BODIESNUTRIENT STORAGE MAINLY PROTEINS

ACTION OF A B. thuringiensis INSECTICIDE

TRANSGENIC CORN PLANT

LIST OF FAMOUS CROPS AND PESTS

CROPS PESTS

• Corn Black cutworm Corn earworm  Common stalk borer • Cotton European corn borer

• Potato Pink bollworm

CONCLUSION• Elimination of undesired pests• Eco-friendly• Cheap