Biorational approaches to managing Datura stramonium

• Published in: Weed science Vol. 47; no. 6; pp. 750 - 756
• Main Authors: Zhang, J, Salas, M.L, Jordan, N.R, Weller, S.C
• Format: Journal Article
• Language: English
• Published: 01.12.1999
• Subjects: atrazine; biological control; biological resistance; conservation tillage; cover crops; crop rotation; cropping systems; cultural control; Datura stramonium; Glycine max; herbicide-resistant weeds; integrated pest management; integrated weed management; metribuzin; population dynamics; pyridate; Secale cereale; seed productivity; soil management; weed control; Zea mays; Indiana
• ISSN: 0043-1745; 1550-2759
• DOI: 10.1017/S0043174500091438

Field experiments were conducted from 1995 to 1997 to test approaches to managing atrazine-resistant Datura stramonium. Eight weed management programs in a Zea mays and Glycine max rotation were evaluated for their effects on the dynamics of atrazine-resistant and -susceptible D. stramonium populations. Overall D. stramonium density and relative abundance of resistant (R) biotypes were greatly reduced in no-till Secale cereale L. (rye) cover crop management programs without triazine compared to conventional-tillage systems with the application of triazine herbicides. The negative effects of no-till on D. stramonium were greater under a G. max-Z. mays-G. max (SCS) rotation than under a Z. mays-G. max-Z. mays (CSC) rotation. A cropping system involving more G. max phases under no-till reduced both the resistant and susceptible D. stramonium populations. Results from this study support the use of soil management crop rotation, and negative cross-resistant herbicides to manage atrazine-resistant biotypes.