We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of CGA 123407 as a safener for pretilachlor in rice (Oryza sativa L.). Recordings of elongation rates of single rice leaves.
- Authors
Christ, R. A.
- Abstract
The elongation rates of single attached leaves of rice (<em>Oryza sativa</em> L.) were recorded. The effect of pretilachlor on the elongation rates and the safening effect of CGA 123407 [4,6-dichloro-2-phenyl-pyrimidine] were evaluated. Both chemicals were applied to the roots in a nutrient solution. Pretilachlor reduced leaf elongation in concentrations as low as 300 µg 1-1 (9.6 x 10-7 M) but, for combination trials with the safener, 3 mg 1-1 (9.6 x 10-6 M) was used. In combination with pretilachlor the safener prevented damage in very low concentrations. The ratio of pretilachlor to safener, 30:1, was sufficient when both chemicals were given to roots in nutrient solution, although for field work the ratio of 3:1 is recommended. The safener alone did not influence the elongation rate of rice leaves in the concentrations used. When pretilachlor was given to the roots and CGA 123407 to the shoot, some delay in the herbicidal action was recorded but even with high concentrations of the safener no continuous safening effect was achieved. CGA 123407 was also effective when given previous to the herbicide. This proved true even with a 2-day interval between safener uptake and application of the herbicide. When pretilachlor was given first, the safener effected recovery to various degrees when given 1-4 days after the herbicide application. When pretilachlor was given for a limited period of time only (1-3 days) and was subsequently removed from the nutrient solution, recovery of the plant occurred. It is speculated that the safener either helps this recovery or else competitively prevents the herbicide from occupying the sites of action or from keeping them occupied for a long period of time.
- Subjects
HERBICIDE safeners; RICE; LEAVES; HERBICIDES; PYRIMIDINES
- Publication
Weed Research, 1985, Vol 25, Issue 3, p193
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1985.tb00635.x