Cotton growth and yield response to simulated 2, 4-D and dicamba drift

Journal or Publishing Institution: Weed Technology

Study: https://www.jstor.org/stable/pdf/40587121.pdf?casa_token=Pu8aM5cO3XEAAAAA:I6XwIhspRQxiMHyzMDYF0_vzcywHdyiYVNbOfuGPPOQelPRj97bIElofBteNyw6y1Ob0dGlQrejiiWGWT-z8j_iV01Hp7NE83yCboOO1NMWM2c38hxq3

Author(s): Everitt, J.D. and Keeling, J.W.

Article Type: Peer Reviewed Study

Record ID: 650

Abstract: Field experiments were conducted in Hale Co., TX, in 2005 and 2006 to determine the effects of 2,4-D amine and dicamba applied at varying rates and growth stages on cotton growth and yield, and to correlate cotton injury levels and lint yield reductions. Dicamba or 2,4-D amine was applied at four growth stages including cotyledon to two-leaf, four- to five-leaf, pinhead square, and early bloom. Dicamba and 2,4-D amine were applied at 1/2, 1/20, 1/200, and 1/2000 of the recommended use rate. Crop injury was recorded at 14 days after treatments and late-season, and cotton lint yields were determined. Across all growth stages, 2,4-D caused more crop injury and yield loss than dicamba. Cotton lint was reduced more by later applications (especially pinhead square) and injury underestimated yield loss with 2,4-D. Visual estimates of injury overestimated yield loss when 2,4-D or dicamba was applied early (cotyledon to two leaf) and was not a good predictor of yield loss.

Key words: Crop injury, herbicide drift

Citation: Everitt, J.D. and Keeling, J.W., 2009. Cotton growth and yield response to simulated 2, 4-D and dicamba drift. Weed Technology, 23(4), pp.503-506.