Efficacy and selectivity of alternative herbicides to glyphosate on maize

Giraldeli, Ana Lígia; Silva, Gustavo Soares da; Silva, André Felipe Moreira; Ghirardello, Giovani Apolari; Marco, Lucas Rafael de; Filho, Ricardo Victória

doi:10.1590/0034-737x201966040006

Cited by 12 publications

(8 citation statements)

References 22 publications

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“…The application of atrazine did not damage the maize, confirming information in the literature (Dan et al, 2010;Giovanelli et al, 2018;Giraldeli et al, 2019;Richburg et al, 2020) and for LL maize. In the latter case, atrazine was used in combination with glufosinate (Silva et al, 2017).…”

Section: Experiments IIsupporting

confidence: 86%

Growth, development, and chlorophyll indexes of glyphosate and glufosinate-tolerant maize under herbicide application

Albrecht

Silva²,

Krenchinski

et al. 2022

Agron. Colomb.

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Glyphosate, glufosinate, and atrazine do not affect the growth and development of glyphosate and glufosinate-tolerant (RR2/LL) maize; however, the results are less consolidated for these herbicides applied in mixtures. The aim of the present study was to evaluate the effects of post-emergent application of glyphosate, glufosinate, and atrazine, alone and in mixtures, on the growth and development of the RR2/LL maize. The treatments consisted of the application of glyphosate (1080 g of acid equivalent [ae] ha-1), glufosinate (500 g of active ingredient [ai] ha-1), atrazine (2000 g [ai] ha-1), glyphosate + glufosinate, glyphosate + atrazine, glufosinate + atrazine, glyphosate + glufosinate + atrazine, and the control (without application). The experiment was carried out in two locations under greenhouse conditions with different maize hybrids. Crop injury and variables of the agronomic performance (height, stem diameter, chlorophyll indexes, fresh and dry weight of shoot, root dry weight, and total dry weight) were evaluated. Herbicides applied alone or in binary mixtures did not cause major damage. However, the application of the three associated herbicides in some situations might result in detrimental effects on the development of the RR2/LL maize.

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Section: Experiments IIsupporting

confidence: 86%

Growth, development, and chlorophyll indexes of glyphosate and glufosinate-tolerant maize under herbicide application

Albrecht

Silva²,

Krenchinski

et al. 2022

Agron. Colomb.

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“…Brazil uses a large quantity of herbicides based on nicosulfuron and atrazine in the production of maize sold locally as well as for export, although restrictions are reducing or even eliminating the use of these products in certain areas. The expiration of patents has increased the number of commercial herbicide products in Brazil [13,14,26,27], where crop management aims to reduce the amount of a.i. applied per hectare through the use of modern cultivation techniques, including the no-tillage system and transgenic plants [28].…”

Section: Discussionmentioning

confidence: 99%

“…This active principle inhibits photosystem II, causing irreversible damage to plant cells [11,12]. The herbicides nicosulfuron and atrazine are compatible in mixtures, and generally show greater e ciency in weed control when applied together [13,14]. These a.i.…”

Section: Introductionmentioning

confidence: 99%

High Tolerance of Trichogramma Pretiosum (Hymenoptera: Trichogrammatidae) to the Mixture of the Herbicides Nicosulfuron Plus Atrazine

Leite¹,

Cordeiro²,

Santos³

et al. 2020

Preprint

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Background: Maize, Zea mays (Poaceae), is one of the most important crops in the world, but defoliating caterpillars (Lepidoptera) and weeds can reduce the productivity of this plant. The control of weeds in the maize crop in Brazil is mainly accomplished with nicosulfuron- and atrazine-based herbicides, and of lepidopteran pest eggs with use of several species of Trichogrammatidae (Hymenoptera) parasitoids released. The objective of this study was to evaluate the rates of parasitism and emergence of females and the sex ratio (%) of 10 Trichogrammatidae species, in a free-choice test, submitted to a mixture of the herbicides Sanson 40 SC® (a.i. nicosulfuron; dose: 30 g.ha–1) + Gesaprim 500 Ciba-Geigy® (a.i. atrazine; dose: 1500 g.ha–1) in the laboratory.Results: The parasitism rate (%) of Trichogramma acacioi Brun, Moraes & Soares, Trichogrammatoidea annulata de Santis, Trichogramma atopovirilia Oatman & Platner, Trichogramma bennetti Nagaraja & Nagarkatti, Trichogramma brunni Nagaraja, Trichogramma brasiliensis Ashmead, Trichogramma demoraesi Nagaraja, Trichogramma galloi Zucchi, and Trichogramma soaresi Nagaraja was lower with the herbicide mixture of nicosulfuron + atrazine than the control and, therefore, this mixture was considered to be slightly harmful (i.e., class II of the International Organization for Biological and Integrated Control) to these parasitoids. This solution reduced the emergence rate (%) of female T. acacioi, T. annulata, T. atopovirilia, T. bruni, T. brasiliensis, T. demoraesi, T. galloi, and T. soaresi, being classified as harmless to T. soaresi, moderately harmful to T. galloi and slightly harmful to the other species. The herbicide mixture of nicosulfuron + atrazine reduced the sex ratio of T. acacioi, T. atopovirilia, T. bruni, T. demoraesi, T. galloi, and T. soaresi, being classified as harmless to T. annulata and T. brasiliensis, and slightly harmful to the other species.Conclusions: The biological parameters (i.e., rates of parasitism and emergence and the sex ratio) of T. pretiosum, followed by T. bennetti, T. annulata and T. brasiliensis were the least affected by the herbicide mixture. These species should be chosen for release, on pieces of paperboard with parasitized E. kuehniella eggs, in crops together with the application of nicosulfuron + atrazine.

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“…Both the experiments showed a decrease in yield, especially in E1, combined with saflufenacil. The isolated or combined application of atrazine and mesotrione is commonly used to control weeds in maize (Matte et al 2018), with selectivity for the crop (Giraldeli et al 2019). However, this was not observed in the wheat crop of the present study.…”

Section: Herbicidementioning

confidence: 99%

Agronomic performance of wheat under post-emergence herbicide application

Colombo

Albrecht

et al. 2022

Pesqui. Agropecu. Trop.

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In addition to the herbicides already registered for the wheat crop, others may be selective, such as saflufenacil, atrazine, mesotrione and triclopyr. This study aimed to assess the selectivity of herbicides via crop yield analysis, alone and in mixtures, applied to wheat in post-emergence, at the end of tillering. Two experiments were conducted using a randomized blocks design. The first experiment (E1) involved 13 and the second one (E2) 7 treatments, consisting of the application of 2,4-D, diclofop, iodosulfuron, clodinafop, saflufenacil, pyroxsulam, atrazine, mesotrione and triclopyr, alone or in mixtures. Wheat injury symptoms, plant height, number of spikelets per plant, number of grains per spikelet, 1,000-grain weight and yield were assessed. The application of diclofop and iodosulfuron was selective to the wheat, maintaining yield even under the water stress conditions observed in E1. Under the same conditions, applying 2,4-D, clodinafop, saflufenacil, pyroxsulam, atrazine/mesotrione, triclopyr or saflufenacil + atrazine/mesotrione reduced the wheat yield, with different injury levels. Under greater water availability (E2), 2,4-D, clodinafop, saflufenacil, pyroxsulam and triclopyr were selective to the wheat, with no negative effect on yield. The application of atrazine/mesotrione showed a high injury potential for the crop and reduced the wheat yield.

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Efficacy and selectivity of alternative herbicides to glyphosate on maize

Cited by 12 publications

References 22 publications

Growth, development, and chlorophyll indexes of glyphosate and glufosinate-tolerant maize under herbicide application

Growth, development, and chlorophyll indexes of glyphosate and glufosinate-tolerant maize under herbicide application

High Tolerance of Trichogramma Pretiosum (Hymenoptera: Trichogrammatidae) to the Mixture of the Herbicides Nicosulfuron Plus Atrazine

Agronomic performance of wheat under post-emergence herbicide application

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