What is Conventional breeding

Conventional breeding is a process in which genes for pesticidal traits are introduced into a plant by natural methods, such as cross-pollination.  For a plant-incorporated pesticide, one would breed a plant that makes a pesticide with a sexually compatible plant that does not possess this property but possesses other properties of interest to the breeder, e.g., sweeter fruit.  Then, out of the offspring, the breeder would choose the offspring plant that makes the pesticide, and thus expresses the desired pesticidal trait, as well as producing sweeter fruit.