Summary: From Feb. to March, China’s ex-works price of chlorpyrifos technical increased mainly because COVID-19 outbreak forced restricted production in manufacturers. Besides, producers of O,O-diethylthiophosphoryl chloride, an intermediate for chlorpyrifos maintained a low operating rate during this period. On the other hand, occurrence of Spodoptera frugiperda drove up demand for chlorpyrifos technical. Thus the price of chlorpyrifos technical increased after Feb.