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Type: Journal article
Title: Influence of seeding system disturbance on preplant incorporated herbicide control of rigid ryegrass (lolium rigidum) in wheat in Southern Australia
Author: Kleemann, S.
Preston, C.
Gill, G.
Citation: Weed Technology, 2014; 28(2):323-331
Publisher: Weed Science Society of America
Issue Date: 2014
ISSN: 0890-037X
Statement of
Samuel G. L. Kleemann, Christopher Preston, and Gurjeet S. Gill
Abstract: Field experiments were conducted in 2008, 2011, and 2012 to investigate the interaction between seeding system disturbance and PPI herbicides on rigid ryegrass control in wheat. Of the herbicides examined, prosulfocarb + S-metolachlor, and pyroxasulfone provided ≥ 70% control of rigid ryegrass, irrespective of seeding system. In contrast, trifluralin was the least-effective herbicide against rigid ryegrass and was particularly ineffective when used with single disc (10% control) relative to the triple-disc seeding system (80%) in 2012. Trifluralin consistently reduced wheat density when incorporated using single discs (46 to 59%) but not do so with the triple disc or double-shoot knife-point systems. Although there were large differences in crop establishment because of herbicide phytotoxicity, that did not always translate into large differences in yield because wheat was able to recover from reductions in plant density by increasing the spike number per plant. Pyroxasulfone caused no damage to wheat and appeared to be the most suitable PPI herbicide for use with single-disc seeding systems. = En 2008, 2011 y 2012, se realizaron experimentos de campo para investigar la interacci´on entre la perturbaci´on causada por el sistema de siembra y el herbicida PPI en el control de Lolium rigidum en trigo. De los herbicidas examinados, prosulfocarbþS-metolachlor, y pyroxasulfone brindaron 70% de control de L. rigidum, independientemente del sistema de siembra. En contraste, trifluralin fue el herbicida menos efectivo contra L. rigidum, y fue particularmente inefectivo cuando se us´o con el disco sencillo (10% de control) en relaci´on con el sistema de triple-disco (80%) en 2012. Trifluralin redujo consistentemente la densidad del trigo cuando se incorpor´o usando discos sencillos (46 a 59%), pero esto no ocurri´o con el triple-disco o con sistemas de doble cuchilla. Aunque hubo grandes diferencias en el establecimiento del cultivo debido a la fitotoxicidad de los herbicidas, esto no siempre se tradujo en grandes diferencias en rendimiento porque el trigo fue capaz de recuperarse de las reducciones en densidad de plantas al incrementar el n´umero de espigas por planta. Pyroxasulfone no caus´o da˜no al trigo y pareci´o ser el herbicida PPI ma´s adecuado para uso con sistemas de siembra de disco sencillo.
Keywords: Seeding systems; preplant incorporated herbicides; weed control
Description: Abstract in English and Spanish
Rights: Copyright status unknown
RMID: 0030010220
DOI: 10.1614/WT-D-13-00065.1
Appears in Collections:Agriculture, Food and Wine publications

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