NITRUR FRUTAGEN is a biological insecticide that contains spores, crystals deltaendotoxins (protein toxins), fermentation solids and BT Aizawai cell fragments as active agents. Controls lepidopterans grubs. It acts by ingestion. After the lethal ingestion, the larvae stops feeding after an hour. Mortality occurs between the 2nd and 3rd day of ingestion of treated surface. Symptoms: the grub begins to die slowly, stops eating, becomes lethargic in their movements, changes their color, turning black while their size reduces, and dies.