Mode of action
The active ingredients of the Beludzhi fungicide, SC belong to different chemical groups and have different mechanisms of action on pathogens.
Chlorothalonil belongs to the chemical group of chloronitriles (FRAC M, Group M5), which inhibit the germination of conidia and spores due to their multisite activity. The mechanism of action on the fungal cell is nonspecific; it binds the thiol groups of peptides, proteins, and amino acids, disrupting the functions of the cells' respiratory and glycolytic enzymes, preventing the pathogen from entering the plant.
Boscalid belongs to the chemical group of pyridinecarboxamides (FRAC C2, Group 7) and has a new, unique mechanism of action on a wide range of pathogens. During treatment, one part of the active substance remains on the plant surface, while the other part penetrates and spreads translaminally, and then spreads acropetally through the leaf vascular system. The mechanism of action of boscalid is to inhibit succinate dehydrogenase (SDHI) in the mitochondrial electron transport chain. Boscalid blocks a key step in cell respiration in Complex II, disrupting the energy supply of pathogens. Boscalid inhibits spore germination, the growth of germ tubes, and the formation of appressoria. In some fungi, it also affects the development of mycelium and spores.
Speed of action
Due to its anti-sporulating effect on germinating spores, the solution acts immediately after application, and the mycelium of pathogens inside plant tissues dies within 1-3 hours after treatment.
Protective effect period
Up to 14 days, depending on the infectious load, weather conditions, and other factors.
