Abstract
Some properties of the tablets of chlornitrofen (CNP) including sodium hydrogencarbonate and tartaric acid as bubbling agents, which are used for weed control in paddy fields were investigated under green house conditions.
The results are summarized as follows.
1. The rate of emission and amount of the bubbling gas increased when the water temperature increased between 10°C and 30°C. At the same time, the amount of chlornitrofen released into water and the herbicidal efficacy on barnyardgrass also increased.
2. The properties of the formulation were affected by the humidity conditions of the tablets during storage. At a higher humidity level, the amount of bubbling gas was smaller than at a lower humidity level. The loss of the bubbling activity resulted in the decrease in the amount of released chlornitrofen and herbicidal efficacy.
