List of Articles reduced herbicide dose

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  1 - Integrated Weed Management of Cotton Planting in Conventional and Ultra-Narrow Row Space
  Ali Reza Ghavi Mohammad Armin
  10.30495/jcep.2021.679981
  To determine the most appropriate method of weed management in conventional row and ultra narrow row spacings of cotton, a factorial experiment was based on a randomized complete block design with three replications was conducted in Sabzevar in 2015-2016. Factors under More

  To determine the most appropriate method of weed management in conventional row and ultra narrow row spacings of cotton, a factorial experiment was based on a randomized complete block design with three replications was conducted in Sabzevar in 2015-2016. Factors under study were plant spacings in two levels, conventional (70 cm row spacing) and ultra-narrow row (20 cm row spacing) and weed management in six levels: without controlling of weeds (control), application of herbicide at recommended dose of Ethalfluralin (Treflan 48% EC) at 1160 g/ai ha), application of herbicide at 50% recommended dose + hand weeding at 45 days after emergence (DAE), application of herbicide at 50% recommended dose + two times hand weeding at 30 and 60 DAE, three times hand weeding at 30, 45 and 60 DAE, and full weed free condition. The results showed that traits like weed density, by 33.71 percent, lateral branches by 14.77 percent, number of bolls per plant by 16.88 percent, and boll weight by 12.30 percent were lower in narrow row spacing, while seed cotton yield by 39.85 percent and fiber yield by 23.71 percent higher, as compared to, conventional row spacing. In the conventional cultivation system, if 50% of the herbicide dose is reduced, it needs two hands weeding at 30 and 60 DAE; while in ultra-narrow row spacing condition, with a 50% reduction in the recommended herbicide dose, one hand weeding at 45 DAE is needed to achieve suitable seed cotton yield. As a whole, the results showed that, under ultra-narrow row spacing, with a 50% reduction in herbicide dose and reduced weed control times (only one hand weeding at 45 DAE) it can be obtained seed cotton yield similar to other control treatments. Manuscript profile
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  2 - Effect of seed priming and weed management on yield and yield components of maize (Zea mayz L.)
  Amin Allah Poudineh1 Hassan Makarian*2 Hamid Abbasdokht2 Mehdi Baradaran Firouz Abadi2 Abbas Nasiri Dehsorkhi3
  In order to investigate the effect of integrated weed management on yield and yield components of maize (SC704) an experiment was conducted at the research field of Shahrood University of Technology as randomized complete blocks design with four replications. The treatm More

  In order to investigate the effect of integrated weed management on yield and yield components of maize (SC704) an experiment was conducted at the research field of Shahrood University of Technology as randomized complete blocks design with four replications. The treatments were; weed free, weedy, recommended herbicide dose (nicosulfuron 80 g.a.i. ha-1), hydro priming + reduced herbicide dose (nicosulfuron 40 g.a.i. ha-1), hydro priming + weeding 6 weeks after crop emergence, hydro-priming, hydro-priming + priming with salicylic acid + reduced herbicide dose, priming with salicylic acid, priming with salicylic acid + weeding, priming with salicylic acid + reduced herbicide dose, hydro-priming + priming with salicylic acid + weeding. The results indicated that no significant difference was observed in density and biomass of weeds between the combinations treatments (priming with salicylic acid + reduced herbicide dose and hydro-priming + priming with salicylic acid + weeding 6 weeks after emergence) and herbicide recommended dose treatment. Hydro-priming + reduced herbicide dose increased the biological yield by 25 and 45 percent in comparison to herbicide recommended dose and weed free treatments, respectively. The results indicated that hydro priming + reduced herbicide dose and priming with salicylic acid + reduced herbicide dose of nicosulfuron increased grain yield by 45.3% in comparison to weedy treatment. Based on the results of this experiment, seed priming in combination with reduced dose of herbicide and or with weeding, can effectively control weeds and increase crop yield and also reduce herbicide consumption. Manuscript profile