Group 27 herbicide
Mode of Action
Callisto contains the active ingredient Mesotrione. Once absorbed by the target weed, mesotrione quickly moves to its site of action in the cytoplasm of the chloroplasts. Mesotrione inhibits an essential plant enzyme called HPPD (p-hydroxyphenyl pyruvate dioxygenase) that is found primarily in the cytoplasm of the chloroplasts.
Disruption of pigment synthesis causes bleaching symptoms in susceptible plants that leads to necrosis and plant death. Visible symptoms of weed injury include bleaching of foliage and growing points.
Typically, following a post-emergent application, visual symptoms appear 3-5 days after application with weed death occurring within 2-3 weeks. However, weeds stop competing with the crop soon after application.
Callisto is a group 27 herbicide. Do not use another group 27 herbicide in the same field in the same year.
The following re-cropping intervals should be observed:
Winter Wheat: 3 months
Spring Wheat, Field Corn (grain or silage), Seed Corn, Sweet Corn: 10 months
Alfalfa, Potato, Soybeans, Transplanted Tomato, White Beans: 11 months
All other crops: Bioassay
Observe the re-cropping guidelines of any product(s) to be tank mixed with Callisto 480SC herbicide.