Fructose and sucrose as priming molecules against pathogens and pests?

Abstract: In vineyards, fructose allowed to reduce the doses of copper against Plasmopara viticola. Fructose showed the same efficacy as the natural pyrethrum against Scaphoideus titanus. In corn production, sucrose and fructose reduced the number of Ostrinia nubilalis larvae. The sucrose reduced the frequency of attack of Helicoverpa armigera.