Combining stale seedbed with deep rice planting: a novel approach to herbicide resistance management?

Ceseski, Alex R.; Godar, Amar S.; Al‐Khatib, Kassim

doi:10.1017/wet.2022.2

Cited by 8 publications

(10 citation statements)

References 23 publications

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“…N. Snow] are highly problematic due to resistance to most available rice herbicides in California (Becerra-Alvarez and Al-Khatib 2022; Hill et al 2006). These species require alternative control methods, for example, stale seedbed application incorporating glyphosate, to maximize control (Ceseski et al 2022).…”

Section: Resultsmentioning

confidence: 99%

“…The foundational goal of this technique is to germinate as many weed seeds as possible from the seedbank and eliminate them with nonselective preplant control strategies. This method is implemented in rice by flooding the field to some degree for some amount of time (Ceseski et al 2022; Dilipkumar et al 2022; Singh et al 2018). Flooding ceases after weed seeds germinate and seedlings emerge.…”

Section: Introductionmentioning

confidence: 99%

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Utilizing germinability thresholds for optimizing stale seedbed applications to control red rice (Oryza spp.) in California rice cropping systems

2023

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“Weedy” red rice is a problematic weed due to its phenotypic similarities with cultivated rice. Limited herbicide availability has driven a need for non-chemical control options for managing this pest. One pre-planting strategy that is being explored is the stale seedbed methodology which aims to maximize soil seedbank withdrawals via germination. This technique is adapted in rice by flooding a field, waiting for germination and emergence of weed seedlings, and completed with a mechanical or chemical control application. Optimization of this process is dependent on maximizing weed seed germination which is primarily influenced by both temperature and moisture availability. Germinability across a range of these factors is not well understood in California red rice. Thus, this study was aimed to determine germinability of California red rice accessions under various temperature and water potential treatments. Previously described red rice accessions 1, 2, 3, and 5 along with M206, a common California rice cultivar, were exposed to temperatures from 10 to 40 C in combination with water potentials of 0, -0.2, -0.4, or -0.8 MPa until either germination or weed seed decay occurred. Statistical analysis indicated a 3-way interaction between accession, temperature, and water potential. Germination reached 95% when seeds were exposed to temperatures from 20 to 35 C in combination with 0 or -0.2 MPa. Germination was lowest when seeds were water stress (-0.8 MPa), and when temperatures were colder than 20°C or warmer than 35°C. M206 cultivar was utilized for comparison and demonstrated cold tolerance by germinating at 10 C while weedy accessions 1, 2, and 3 did not. When temperatures were at or above 15 C however, M206 germinated less often compared with all weedy accessions. Historical pre-plant temperatures in this region align with those required for weedy rice germination, thus, the stale seedbed methodology is a viable strategy in years when ample flood water is available.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utilizing germinability thresholds for optimizing stale seedbed applications to control red rice (Oryza spp.) in California rice cropping systems

2023

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“…Because frequent drought has increased concerns about water management in California rice, there may be an increase in the number of farmers who practice dry seeding instead of the traditional continuously flooded system (Brim-DeForest et al 2022). Studies on the impact of dry seeding on weed dynamics, its ecological fitness, or its role in managing herbicide resistance have received some attention in recent years (Brim-Deforest et al 2017b, 2022; Ceseski et al 2022; Pittelkow et al 2012). Brim-DeForest et al (2017a) evaluated weed community dynamics under various water management regimes in California rice and found a greater abundance of Echinochloa species occurred in a dry-seeded alternate wet and dry water management regime compared to continuously flooded conditions.…”

Section: Research Efforts In the Nonchemical Weed Management Spacementioning

confidence: 99%

Echinochloa in mid-southern U.S. and California rice: What is known and what are the knowledge gaps?

Godar

Norsworthy

2023

Weed Technol

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Several Echinochloa P. Beauv. species, introduced at multiple events, have established themselves as a persistent concern for US rice production. In this review, we highlight the key biological characteristics of economically relevant Echinochloa in US rice, revisit their historical trajectory, and put forward research directions for their management with special reference to barnyardgrass. Ecologically-differentiated Echinochloa species have a distinct association with rice culture methods that have been practiced in a region, barnyardgrass being historically predominant in drill-seeded rice in the mid-South, and early watergrass and late watergrass in water-seeded California rice for the last few decades. However, the emerging evidence challenges the dogma that other Echinochloa species for the specific regions are of less importance. Primarily managed by the water-seeding method of rice culture in the early years, Echinochloa species have persisted in the sophisticated US rice culture through the evolution of resistance to herbicides in the later course. Accumulating knowledge, including those of recent genomic insights, suggests the rapid adaptability of Echinochloa. The last decade has seen a (re)emergence of non-chemical methods as a key component of a sustainable management approach, among which use of harvest weed seed control (HWSC) methods and cover crops in the mid-South and stale-drill seeding in California are being considered as potential tools for management of Echinochloa. In recent years, furrow-irrigated rice has rapidly supplanted a significant proportion of conventionally flooded rice in the mid-South, whereas the propensity for compromised continuous submergence is increasing in California rice. On the cusp of this shift, the question at the forefront is how this will affect Echinochloa interference in rice and how this change will dictate the management efforts. Future research will develop a clear understanding of the impact of the changing agroecosystems on Echinochloa species as well as their response to the prospective integrated control interventions.

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“…Flooded rice agroecosystems are common worldwide in most rice production areas; however, certain regions have restrictions on the available herbicides to control weeds. For example, in California, largely owing to ecotoxicity concerns and strict regulatory structures (Ceseski and Al-Khatib 2021;Hill et al 1994), only 13 registered active ingredients across nine modes of action (MOAs) are available for use in flooded rice fields, which creates few opportunities for herbicide rotation to inhibit herbicide resistance development (Espino et al 2019). By contrast, 60 active ingredients are registered for use in corn in the U.S. Midwest (Gerber 2021).…”

Section: Introductionmentioning

confidence: 99%

“…N. Snow], and weedy rice ( Oryza sativa f. spontanea Rosh.) (Brim-DeForest et al 2017; Ceseski et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Responses of rice genotypes to foliar-applied metribuzin

Marsh,

Al-Khatib

2023

Weed Technol

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The increasing development of herbicide resistance in weeds found in rice cropping systems has encouraged researchers to evaluate alternate herbicides to prevent and manage herbicide-resistant weed biotypes. Metribuzin is a photosynthetic-inhibiting herbicide that controls various important grass and broadleaf weeds. Several crops, including soybeans, wheat, peas, and potatoes, have shown differential varietal responses to metribuzin. To determine whether rice has differential varietal responses to metribuzin for potential utilization in a rice breeding program, greenhouse experiments were conducted to evaluate the responses of 142 long-, medium-, and short-grain rice genotypes to the herbicide. Metribuzin was applied at 0, 22, 44, 88, 176, and 352 g ai ha-1 when rice plants were in the three- to four-leaf stage. Crop response regarding phytotoxicity, height reduction, and biomass reduction was evaluated. Metribuzin caused significant injury to all rice genotypes tested, but short-grain rice genotypes were, on average, more susceptible than medium- and long-grain rice. Short-grain rice genotypes generally had greater height reduction and produced less biomass than long-grain or medium-grain rice genotypes. Crop visual injury ratings were correlated with plant height reductions and biomass reductions. The results indicate that the level of metribuzin tolerance in rice is inadequate for commercial use; however, further research is needed to develop higher levels of herbicide resistance by mutagenized rice cultivars.

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Combining stale seedbed with deep rice planting: a novel approach to herbicide resistance management?

Cited by 8 publications

References 23 publications

Utilizing germinability thresholds for optimizing stale seedbed applications to control red rice (Oryza spp.) in California rice cropping systems

Utilizing germinability thresholds for optimizing stale seedbed applications to control red rice (Oryza spp.) in California rice cropping systems

Echinochloa in mid-southern U.S. and California rice: What is known and what are the knowledge gaps?

Responses of rice genotypes to foliar-applied metribuzin

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