<Li> Studies in America have shown that fruit flies that infest orange groves were becoming resistant to malathion . </Li> <Li> In Hawaii, Japan and Tennessee, the diamondback moth evolved a resistance to Bacillus thuringiensis about three years after it began to be used heavily . </Li> <Li> In England, rats in certain areas have evolved resistance that allows them to consume up to five times as much rat poison as normal rats without dying . </Li> <Li> DDT is no longer effective in preventing malaria in some places . </Li>

Based on the graph during what years did pesticide application likely become prevalent