Phytotoxicity clomazone associated with dietholate the crop wheat

Abstract

Nowadays it has become important to test new alternatives herbicide molecules, even if they are not registered for the control of weeds that infest wheat, to evaluate the phytotoxicity to culture and the ability to manage resistant weeds to the products used for this purpose. Thus, an experiment was conducted to evaluate the Phytotoxicity of clomazone associated or not to the dietholate safener applied on wheat. The experiment was conducted in a completely randomized design, arranged in a factorial scheme (5 x 4) + 2 + 2, with four replications. In the factor allocated to dietholate doses (0, 120, 240, 360 and 480 g per 100 kg of seed) and the B clomazone doses (0, 198, 396 and 594 g ha^-1). Additional Treatments were the control treatments infested and without the application of herbicide, and the application in post-emergence of iodosulfuron-methyl (5 g ha^-1) and pyroxsulam (18 g ha^-1). The increase in clomazone doses caused increased phytotoxicity to wheat, with or without the safener. The dietholate showed no ability to protect the wheat from the phytotoxic effects of the herbicide clomazone. The use of clomazone associated with dietholate for weed control on wheat is not recommended. The pyroxsulam was the herbicide that caused minor injuries to wheat.