Allelopathic potential of sunflower (Helianthus annus) water extracts to reduce the pendimethalin herbicide dose to control Chenopodium album in corn (Zea mays)

作者：Farhoudi Rozbeh^*; Lee Dong Jin

来源：Allelopathy Journal, 2015, 35(1): 97-107.

• Abscisic acid
• allelopathy
• antioxidant enzyme
• lipid peroxidation
• pendimethalin

In field studies, we evaluated the combinations of sunflower (Helianthus annus) extract and reduced doses of herbicide pendimethalin to control Chenopodium album in corn field. The experimental treatments were: control, pendimethalin full dose (600 mL ha(-1)), pendimethalin half dose (300 mL ha(-1)), sunflower extracts (10 and 20%), pendimethalin half dose + 10% sunflower extract and pendimethalin half dose + 20% sunflower extract. Combinations of sunflower extract (20%) with pendimethalin half dose, drastically decreased the C. album density and seedling weight (81.3% and 82.8% inhibition over control) than other treatments except pendimethalin full dose. The minimum LAI of C. album was with pendimethalin full dose (75.5 %) and pendimethalin half dose + 20% sunflower extract (71 %). Pendimetalin full dose and pendimethalin half dose + 20% sunflower extract decreased the photosynthesis to 59% and 55% of control, respectively. All treatments increased the ABA contents in C. album seedling, but the highest ABA content was with pendimethalin full dose (74.7%) and pendimethalin half dose + 20% sunflower extract treatments (75.4 % over the control). We concluded that the phytotoxic effects of sunflower extract tank mix with pendimethalin could reduce the herbicide doses for C. album control.

• 出版日期2015-1