Compounds having formula (I), in which R to R have the definition given in the first claim, are known as weed-killers. The amounts of these compounds that are usually applied to cash crops often damage the cash crops themselves, when one tries to achieve a sufficient effect against typical weeds of such crops. According to the invention, however, the amounts used in rice plantations can be reduced down to 0.001 to 0.5 kg a.i./ha, with an effective result against the main species of rice weeds, such as Sagittaria, Cyperus, Scirpus and Eleocharis.

Title
Herbicidal method in rice
Application Number
90108465
Publication Number
1051840
Application Date
October 17, 1990
Publication Date
June 5, 1991
Inventor
Oswald Ort
Lothar Willms
Hans Joachim
Agent
HOU TIANJUN
Assignee
Hoechst Aktiengesellschaft
IPC
A01N 41/10
A01N 35/06