Impact of weedy rice populations on the growth and yield of direct‐seeded and transplanted rice

Cao, Qingqing; Li, Bo; Song, Zhi; Cai, Xing Xing; Lu, Bing-Rui

doi:10.1111/j.1445-6664.2007.00241.x

Cited by 27 publications

(18 citation statements)

References 16 publications

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“…The cultured rice yield in this study was higher when fenclorim was used prior to treatment with pre‐emergence pretilachlor, which is in agreement with previous studies (Cao et al . ; Shivrain et al . ; Chung & Park ).…”

Section: Discussionmentioning

confidence: 99%

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Chemical control of weedy rice in precise hill‐direct‐seeded rice in South China

Shen

Gao

Eneji

et al. 2013

Weed Biology and Management

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Precise hill‐direct‐seeded rice, which is both cost‐ and labor‐saving, is based on the direct seeding of rice by using a precision rice hill‐drop drilling machine. Weedy rice (Oryza sativa f. spontanea), also known as “red rice”, is a major weed in precise hill‐direct‐seeded rice, causing an ≤80% yield loss and a reduction in grain quality. The aim of this study was to evaluate the control efficiency of weedy rice by pretilachlor (a pre‐emergence herbicide) and fenclorim (a safener) and their safety for precise hill‐direct‐seeded rice in two consecutive years. The amount of rice seed germination was accelerated by soaking the seeds in the safener at 0.67 g ai L−1 for 1 h before sowing. The pre‐emergence pretilachlor treatments were applied 2 days after sowing cultured rice. The inhibition of the shoot fresh weight of the cultured rice was reduced by 3.3, 6.4 and 7.4% with 450, 900 and 1350 g ai ha−1 of pretilachlor at 32 days after sowing (DAS) and that of the root fresh weight was reduced by 2.6, 4.9 and 8.1%, respectively. With fenclorim and pretilachlor in a precise hill‐direct‐seeded rice field in 2010 and 2011, the weedy rice control efficiency at 32 DAS was reduced by 100 and 98.0%, respectively. The pre‐emergence pretilachlor treatments that were applied at 2 DAS were much more efficient in the weedy rice control and less inhibitory to the cultured rice growth. The rice yield was increased by 26.1–26.7% in the mechanical precise hill‐direct‐seeded rice, relative to the manual‐seeding rice, with the application of fenclorim and pretilachlor.

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Section: Discussionmentioning

confidence: 99%

“…Weedy rice ( Oryza sativa f. spontanea ), of the Poaceae family and also known as “red rice”, is a weed of rice that is widely distributed in rice‐growing areas all over the world, particularly in direct‐seeded rice in South and South‐East Asia, South and North America and southern Europe (Cao et al . 2006; 2007; Vinod et al . ).…”

mentioning

confidence: 99%

Chemical control of weedy rice in precise hill‐direct‐seeded rice in South China

Shen

Gao

Eneji

et al. 2013

Weed Biology and Management

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“…Flooding in well-leveled soils reduces weedy rice germination (Vidotto and Ferrero 2000). The alternative cultivation of direct seeding and transplanted method seems to be effective to decrease the weedy rice populations in rice fields (Suh et al 1997;Cao et al 2007). Rotations with other field crops, such as wheat, maize, soybean, sorghum, and mung beans, have also effectively controlled weedy rice (Watanabe et al 1998).…”

Section: Strategies To Control and Manage Weedy Ricementioning

confidence: 99%

Weedy rice in sustainable rice production. A review

Nadir

Xiong

Zhu

et al. 2017

Agron. Sustain. Dev.

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Weedy rice refers to the unwanted plants of the genus Oryza that have some undesirable agronomic traits and pose a major threat to sustainable rice production worldwide. Widespread adoption of direct seeded rice and hybridization or gene flow between cultivated rice and their wild relatives has resulted in the creation and dissemination of weedy rice. Currently, weedy rice (Oryza sativa f. spontanea) has become one of the most common weeds infesting rice fields worldwide. In this paper, we review the biology, physiology, evolution, and genetic features of weedy rice. We also discuss the major obstacles in weedy rice management, including high diversity of weedy rice, ecological impacts of gene flow on weedy rice, changing climate, and weedy rice management. We then present a framework for the sustainable management and utilization of weedy rice. Our main emphasis is to explore the reservoir of natural variations in weedy germplasm and to utilize them for crop improvement. This review outlines some of the latest biotechnological tools to dissect the genetic backgrounds of several favorable traits of weedy rice that may prove beneficial for breeding and evolutionary studies on cultivated rice. We suggest that by merging the disciplines of genomics, breeding, and weed management, we can achieve the goal of sustainable rice production.

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“…Most rice fields in Peninsular Malaysia and Sabah have varying degrees of weedy rice infestation, with dwarf weedy types becoming more prevalent as a result of selective slashing of taller types. Weedy rice is also emerging as a problem in particular areas of other major rice‐producing areas (Table 1), such as in eastern India, in China, mainly in the north‐east and in Jiangsu and Hainan Provinces,7 and in Vietnam, where it is considered the most serious problem limiting rice yield in dry direct‐seeded fields 8…”

Section: Introduction—the Problemsmentioning

confidence: 99%

A strategy to provide long‐term control of weedy rice while mitigating herbicide resistance transgene flow, and its potential use for other crops with related weeds

Gressel

Valverde

2009

Pest Management Science

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Transgenic herbicide-resistant rice is needed to control weeds that have evolved herbicide resistance, as well as for the weedy (feral, red) rice problem, which has been exacerbated by shifting to direct seeding throughout the world-firstly in Europe and the Americas, and now in Asia, as well as in parts of Africa. Transplanting had been the major method of weedy rice control. Experience with imidazolinone-resistant rice shows that gene flow to weedy rice is rapid, negating the utility of the technology. Transgenic technologies are available that can contain herbicide resistance within the crop (cleistogamy, male sterility, targeting to chloroplast genome, etc.), but such technologies are leaky. Mitigation technologies tandemly couple (genetically link) the gene of choice (herbicide resistance) with mitigation genes that are neutral or good for the crop, but render hybrids with weedy rice and their offspring unfit to compete. Mitigation genes confer traits such as non-shattering, dwarfism, no secondary dormancy and herbicide sensitivity. It is proposed to use glyphosate and glufosinate resistances separately as genes of choice, and glufosinate, glyphosate and bentazone susceptibilities as mitigating genes, with a six-season rotation where each stage kills transgenic crop volunteers and transgenic crop x weed hybrids from the previous season.

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Impact of weedy rice populations on the growth and yield of direct‐seeded and transplanted rice

Cited by 27 publications

References 16 publications

Chemical control of weedy rice in precise hill‐direct‐seeded rice in South China

Chemical control of weedy rice in precise hill‐direct‐seeded rice in South China

Weedy rice in sustainable rice production. A review

A strategy to provide long‐term control of weedy rice while mitigating herbicide resistance transgene flow, and its potential use for other crops with related weeds

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