What is the activity type of Sodium carbonate peroxyhydrate?

Sodium carbonate peroxyhydrate primarily acts as a contact herbicide. This means that its effectiveness relies on direct contact with the target organisms, such as algae or aquatic weeds. When it comes into contact with the organisms, it releases hydrogen peroxide, which disrupts their cellular functions and ultimately leads to their death.

The nature of its action is quite specific, as it doesn't have a systemic action that would allow it to be translocated throughout the plant or organism after application. Translocated herbicides are absorbed and then moved within the plant to affect tissues beyond the point of contact. Since sodium carbonate peroxyhydrate does not function in this manner, the choice identifying it solely as a contact herbicide accurately reflects its primary mechanism of action.