The introduction of transgenic cotton within the cotton industry has allowed for increased yields due to

decreased losses from insect activities. The main pests which have been targeted through the genetic

The VIII International Colloquium on Invertebrate Pathology and Microbial Control and the

VIth International Bacillus thuringiensis Conference were held at Iguassu Falls, Brazil,

August 18-23,2002.

H. armigera and H. punctigera are important pests of cotton in Australia.