Scientists from Université Laval, the University of British Columbia and the University of Oxford were researching spruce budworms and found a natural resistance gene in white spruce. "We could say the gene we discovered produces natural insecticides in the tree foliage," said Dr. Mackay. The gene they discovered was betaglucosidase-1. They had measured expression levels up to about 24,000 genes between two tree groups. The resistant spruce trees were 1,000 times higher than non-resistant.
http://www.sciencedaily.com/releases/2014/11/141121102920.htm
http://en.wikipedia.org/wiki/Choristoneura_fumiferana
