Plant disease control composition and method of controlling plant disease
A plant disease control composition comprising a carboxamide compound represented by formula (I) whose enantiomer ratio R form/S form of the carboxamide compound is 80/20 or more has an excellent plant disease controlling activity.
1. A plant disease control composition comprising a carboxamide compound represented by formula (I):
wherein
R 1 represents hydrogen or methyl,
R 2 represents methyl, difluoromethyl or trifluoromethyl,
and the enantiomer ratio R form/S form of the carboxamide compound is 80/20 or more.
2. The plant disease control composition according to claim 1 , wherein the enantiomer ratio R form/S form of the carboxamide compound is 90/10 to 10000/1.
3. The plant disease control composition according to claim 1 , wherein the enantiomer ratio R form/S form of the carboxamide compound is 95/5 to 10000/1.
4. The plant disease control composition according to claim 1 , wherein the enantiomer ratio R form/S form of the carboxamide compound is 98/1 to 1000/1.
5. The plant disease control composition according to claim 1 , wherein R 1 is methyl and R 2 is methyl in formula (I).
6. The plant disease control composition according to claim 1 , wherein R 1 is hydrogen and R 2 is difluoromethyl in formula (I).
7. The plant disease control composition according to claim 1 , wherein R 1 is hydrogen and R 2 is trifluoromethyl in formula (I).
8. A method of controlling a plant disease comprising a step of treating a plant or a soil where a plant grows with an effective amount of the plant disease control composition according to claim 1 .
9. A carboxamide compound represented by formula (I-R):
wherein
R 1 represents hydrogen or methyl,
R 2 represents methyl, difluoromethyl or trifluoromethyl.
10. The carboxamide compound according to claim 9 , wherein R 1 is methyl and R 2 is methyl.
11. The carboxamide compound according to claim 9 , wherein R 1 is hydrogen and R 2 is difluoromethyl.
12. The carboxamide compound according to claim 9 , wherein R 1 is hydrogen and R 2 is trifluoromethyl.