The herbicide resistance of Kengyili rigidula cv.Aba at its seedling stage to 2, 4D Butylate and Kuoji

An experiment was conducted to determine the suitable dosage of 2, 4D Butylate and Kuoji for controlling weeds in Kengyilia rigidula cv. Aba when it was at the seedling stage. The results of this study showed that the application concentrations of 750 to 2 250 mL 2, 4D Butylate of per hectare and 300 to 900 g Kuoji per hectare did little harm to K. rigidula cv. Aba plants. 750 to 2250 mL 2, 4D Butylate of per hectare and 300 to 900 g Kuoji per hectare did not significantly affect the living rates, height, and tillers per plant of K. rigidula cv. Aba. The application concentrations of 3 000 ml per hectare 2,4D Butylate and 1 200 g per hectare Kuoji significantly reduced the below and above biomass (P0.05) when compared to control, indicating that K.rigidula cv.Aba could suffer from the two herbicides to some extent. This study suggested that 3 000 mL 2, 4D Butylate or 1 200 g Kuoji per hectare was safely threshold value for controlling the weed in K.rigidula cv. Aba when it was at the seedling stage.