Herbicide‐resistant weeds in the Philippines: Status and resistance mechanisms

Baltazar, Aurora M.

doi:10.1111/wbm.12120

Cited by 7 publications

(8 citation statements)

References 61 publications

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“…By contrast, reports of resistant weeds in rice production across India, Southeast Asia, and the Philippines are less common, possibly because of the greater use of hand‐weeding in these areas compared with China, Japan and South Korea . Current estimates are that 70% of the rice production area in India is treated with herbicides for weed control and the remainder depends on manual weeding.…”

Section: Herbicide Resistance In Asiamentioning

confidence: 99%

The challenge of herbicide resistance around the world: a current summary

Peterson¹,

Collavo

Ovejero

et al. 2018

Pest Management Science

249

192

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Herbicide-resistant weeds have been observed since the early years of synthetic herbicide development in the 1950s and 1960s. Since that time there has been a consistent increase in the number of cases of herbicide resistance and the impact of herbicide-resistant weeds. Although the nature of crop production varies widely around the world, herbicides have become a primary tool for weed control in most areas. Dependence on herbicides continues to increase as global populations migrate away from rural areas to cities and the agricultural labor force declines. This increased use of herbicides and the concurrent selection pressure have resulted in a rise in cases of multiple resistance, leaving some farmers with few or no herbicide options for certain weed infestations. Global population and economic forces drive many farmer choices regarding crop production and weed control. The challenge is how to insert best management practices into the decision-making process while addressing various economic and regulatory needs. This review endeavors to provide a current overview of herbicide resistance challenges in the major crop production areas of the world and discusses some research initiatives designed to address portions of the problem. © 2017 Society of Chemical Industry.

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Section: Herbicide Resistance In Asiamentioning

confidence: 99%

The challenge of herbicide resistance around the world: a current summary

Peterson¹,

Collavo

Ovejero

et al. 2018

Pest Management Science

249

192

View full text Add to dashboard Cite

show abstract

“…Competition by the weeds is not only for nutrients; the case has also been with space, light, and moisture in the entire growing season [ 3 ]. Earlier research has shown that yield loss is greater in DSR than in transplanted rice without effective weed control options [ 17 , 185 , 186 ]. Weeds create more problems in DSR than in puddled transplanting because (1) emerging DSR seedlings are less competitive with concurrently emerging weeds, and (2) in wet- and dry-DSR, the initial flush of weeds is not controlled due to the absence of flooding [ 113 , 185 , 186 ].…”

Section: Drivers Of Shift From Puddled Transplanting To Direct Seedin...mentioning

confidence: 99%

Agronomic and Environmental Determinants of Direct Seeded Rice in South Asia

Chaudhary

Venkatramanan

Mishra³

2022

Circ.Econ.Sust.

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Rice ( Oryza sativa L.) is the staple food of more than 50% of the world’s population. Manual puddled transplanted rice (PTR) system is still the predominant method of rice establishment. However, due to declining water tables, increasing water scarcity, water, labor- and energy-intensive nature of PTR, high labor wages, adverse effects of puddling on soil health and succeeding crops, and high methane emissions, this production system is becoming less profitable. These factors trigger the need for an alternative crop establishment method. The direct-seeded rice (DSR) technique is gaining popularity because of its low input demand compared to PTR. It is done by sowing pre-germinated seeds in puddled soil (wet-DSR), standing water (water seeding), or dry seeding on a prepared seedbed (dry-DSR). DSR requires less water and labor (12–35%), reduces methane emissions (10–90%), improves soil physical properties, involves less drudgery and production cost (US$9–125 per hectare), and gives comparable yields. Upgraded short-duration and high-yielding varieties and efficient nutrient, weed, and resource management techniques encouraged the farmers to switch to DSR culture. However, several constraints are associated with this shift: more weeds, the emergence of weedy rice, herbicide resistance, nitrous oxide emissions, nutrient disorders, primarily N and micro-nutrients, and an increase in soil-borne pathogens lodging etc. These issues can be overcome if proper weed, water, and fertilizer management strategies are adopted. Techniques like stale bed technique, mulching, crop rotation, Sesbania co-culture, seed priming, pre-emergence and post-emergence spray, and a systematic weed monitoring program will help reduce weeds. Chemical to biotechnological methods like herbicide-resistant rice varieties and more competitive allelopathic varieties will be required for sustainable rice production. In addition, strategies like nitrification inhibitors and deep urea placement can be used to reduce N 2 O emissions. Developing site and soil-specific integrated packages will help in the broader adoption of DSR and reduce the environmental footprint of PTR. The present paper aims to identify the gaps and develop the best-bet agronomic practices and develop an integrated package of technologies for DSR, keeping in mind the advantages and constraints associated with DSR, and suggest some prospects. Eco-friendly, cost-effective DSR package offers sustainable rice production systems with fewer resources and low emissions. Graphical abstract

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“…The numbers of unique cases of resistance (521 as of this writing) (Figure 1) and the number of herbicides sites of action that are compromised (23 out of 26) have been on a sharp incline since the early 1980s (Baltazar, 2017; Bo et al., 2019; Heap, 2021; Heap, 2014; Heap & Duke, 2018; Liu et al., 2019; Owen et al., 2013; Pieterse, 2010; Ruzmi et al., 2017). Across the globe, herbicide‐resistant weeds have been reported in 94 crops, including grains, vineyards and orchards, and vegetables, in 71 countries and including 263 species (152 dicots and 111 monocots) (Heap, 2021).…”

Section: Introduction To the Current Weed Resistance Problemmentioning

confidence: 99%

“…The number of weed species with multiple resistance (having resistance to two or more herbicide modes‐of‐action) is 110, with 74 resistant to two modes‐of‐action. Around the world, the most problematic weed species are crop‐, country‐, or region‐specific (Baltazar, 2017; Green, 2014; Heap, 2014, 2021; Legleiter & Johnson, 2015; Liu et al., 2019; Owen et al., 2013; Pieterse, 2010; Ruzmi et al., 2017; Sarangi & Jhala, 2018).…”

Section: Introduction To the Current Weed Resistance Problemmentioning

confidence: 99%

Near‐term challenges for global agriculture: Herbicide‐resistant weeds

Clay

2021

Agronomy Journal

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Prior to the 1950s, weeds were controlled by a wide variety of mechanical and cultural methods with limited use of inorganic chemicals at very high rates (100s kg ha -1 ). With the advent of selective carbon-based herbicides in the 1950s, herbicide weed management became the norm throughout much of the world, using grams to a few kilograms of active ingredient per hectare. However, with the benefits, there are problems. A few resistant weeds were recognized in the 1970s, but in 2021, 521 unique cases of resistance have been documented throughout the world. It is imperative for farmers to rethink the herbicide paradigm and for researchers to explore and provide alternative weed management methods so that today's herbicides maintain efficacy and benefits into the future. Near-term management strategies include going back to more integrated approaches, using mechanical techniques, and linking to new technologies to hit weeds with "many little hammers" rather than the "sledge hammer" of one or multiple herbicides. INTRODUCTION TO THE CURRENT WEED RESISTANCE PROBLEMThere are many reasons why herbicides were widely and quickly adopted when introduced in the late 1940s and early 1950s. These include their cost/benefit ratio, convenience, lower labor requirements, fast application methods and plant demise, high selectivity between crop and weed, and high efficacy. With multiple applications of the same herbicide annually, a few resistant weeds were documented (spreading dayflower [Commelina diffusa Burm. f.; Hilton, 1957], wild carrot [Daucus carota L.;Whitehead & Switzer, 1963] to auxin mimic herbicides, and common groundsel [Senecio vulgaris L.;Ryan, 1970) to triazine herbicides) through the first 20 yr of intense herbicide use. Many of the resistant biotypes were considered anomalies rather than substantial Abbreviations: CCA, Certified Crop Advisor.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Herbicide‐resistant weeds in the Philippines: Status and resistance mechanisms

Cited by 7 publications

References 61 publications

The challenge of herbicide resistance around the world: a current summary

The challenge of herbicide resistance around the world: a current summary

Agronomic and Environmental Determinants of Direct Seeded Rice in South Asia

Near‐term challenges for global agriculture: Herbicide‐resistant weeds

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