Can I add one thing about pesticides? There's an element of brand in pesticides that there isn't so much in fertilizer. Fertilizer is strictly commodity, almost generic, to make the comparison.
Although there are generic pesticides available that are more commodity-like, the brand element creates a whole different market element there. Growers may want to purchase, as do retailers, specifically for those brands, to have those products available, because new science and technology delivers new products that are branded.