| Autor: |
Piveta, L. B., Norsworthy, J. K., Smith, D., Arnold, C. T., Woolard, M. C., Carvalho-Moore, P., Butts, T. R., Barber, L. T. |
| Předmět: |
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| Zdroj: |
B.R. Wells Rice Research Studies - Arkansas Agricultural Experiment Station, University of Arkansas System; Aug2023, Issue 696, p149-152, 4p |
| Abstrakt: |
Barnyardgrass and Palmer amaranth are difficult-to-control weeds in furrow-irrigated rice (FIR), especially as herbicide resistance continues to grow throughout the mid-South. The lack of flood in FIR considerably changes weed management for rice. Most growers that use only chemical weed management programs are looking for alternative methods to limit soil weed seedbank replenishment from escaped weeds. The objective of this experiment was to evaluate the use of a Redekop™ Seed Control Unit (SCU) as a non-chemical management strategy for harvest weed seed control (HWSC) of barnyardgrass and Palmer amaranth in FIR. The experiment was designed as a randomized complete block (550 by 25 ft) with eight replications, in Keiser, Ark., in 2022. The two treatments evaluated were harvesting with the Redekop SCU engaged or harvesting with the Redekop SCU disengaged, as would occur in a conventional harvest rice field. In plots where the Redekop SCU was used, seedbank replenishment was reduced by 69% and 83% for barnyardgrass and Palmer amaranth, respectively. Based on initial evaluations, the Redekop SCU could be an asset for rice producers. As HWSC methods become available for commercialization, additional parameters need to be further evaluated, specifically shattering of weed seed before crop harvest and the height distribution of seed on targeted weed species. Incorporation of HWSC may allow producers searching for a systems approach to better manage difficult-to-control weeds by diminishing the number of viable seeds returned to the soil-seedbank. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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