Group 27, Group 9
Mode of Action
Callisto GT is a suspension concentrate containing the soil residual activity of mesotrione and the contact activity of mesotrione and glyphosate. The active ingredients are absorbed through the leaves and rapidly translocated to the plant’s growing points.
Mesotrione (Group 27) is a selective herbicide that interferes with the weed’s photosynthetic ability so that it is unable to protect itself from the sun, resulting in bleaching and death.
Glyphosate (Group 9) is a non-selective herbicide that kills weeds at their growing points as well as being translocated down to roots.
Where possible, rotate the use of Callisto GT or other Group 27 and/or Group 9 herbicides with different herbicide groups that control the same weeds in a field.