Associations Between Herbicides and Glyphosate in Agronomic Performance of RR2 Intact Soybean

Cesco, V.J.S.; Albrecht, Alfredo Júnior Paiola; Rodrigues, Daniel; Krenchinski, Fábio Henrique; Albrecht, Leandro Paiola

doi:10.1590/s0100-83582018360100015

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…Similar results have been observed by PROCÓPIO et al (2007), who, at 13 DAA, have found that the addition of 100 g ha -1 of imazethapyr to glyphosate, at any dose tested, and the combination of 10.0 g ha -1 of chlorimuron-ethyl with 1,440 g ha -1 of glyphosate promoted the highest levels of injuries to RR ® soybean plants, with percentages higher than 30%; the authors have also verified a decrease in the intensity of symptoms caused by the application of herbicides at 25 DAA. Results found by CESCO et al (2018) corroborate our work, as the association of chlorimuron with glyphosate in the development of RR Intact soybean caused phytotoxicity levels of 36% at seven days DAA. The actions of ALS-inhibiting herbicides reduce the levels of the amino acids valine, leucine, and isoleucine, which are directly linked to the production of cell growth proteins (GAZOLA et al 2016).…”

Section: Resultssupporting

confidence: 88%

Seletividade de herbicidas pós-emergentes isolados ou associados a fertilizante foliar na cultura da soja

Alencar

Geist

Pereira

et al. 2022

Rev. Ciênc. Agrovet.

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A associação de herbicidas com fertilizantes foliares é comumente adotada na cultura da soja. Entretanto, essas associações podem ocasionar diferentes efeitos quando aplicadas na soja, necessitando portanto de maiores estudos. Assim, objetivou-se avaliar a seletividade de herbicidas pós-emergentes associados com fertilizante foliar (FF) à base de zinco na cultura da soja RR (resistente ao glifosato). O experimento foi conduzido em delineamento experimental de blocos casualizados, com quatro repetições. Os tratamentos aplicados foram chlorimuron (17,5 g i.a. ha-1); chlorimuron + FF (17,5 + 693 g i.a. ha-1); cloransulam (40 g i.a. ha-1); cloransulam + FF (40 + 693 g i.a. ha-1); fomesafem (225 g i.a. ha-1); fomesafem + FF (225 + 693 g i.a. ha-1); glyphosate (1.280 g i.a. ha-1); glyphosate + FF (1.280 + 693 g i.a. ha-1) e duas testemunhas sendo uma capinada e outra infestada. Foram realizadas avaliações visuais de fitotoxicidade aos 7, 14, 21, 28 e 35 dias após a aplicação dos tratamentos (DAT), e também nessas épocas os teores de clorofila. Ao final do ciclo da cultura foram determinados os dados referentes a produtividade e o peso de 1000 grãos. A fitotoxicidade foi superior a 30% quando se aplicou o cloransulam e o chlorimuron, enquanto que para o fomesafem e o glyphosate a fitotoxicidade foram próximas a 5%, na ausência ou presença do fertilizante foliar. Não ocorreu diferença significativa para a produtividade de grãos, peso de 1000 grãos e umidade. A associação de herbicidas com fertilizante foliar a base de zinco não influenciou na seletividade dos herbicidas aplicados em pós-emergência na cultura da soja RR.

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Section: Resultssupporting

confidence: 88%

Seletividade de herbicidas pós-emergentes isolados ou associados a fertilizante foliar na cultura da soja

Alencar

Geist

Pereira

et al. 2022

Rev. Ciênc. Agrovet.

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“…On this occasion, the number of branches and the number of pods were also counted in five plants per plot. The application of chlorimuron can cause injuries to soybeans, especially when applied post-emergence of soybeans (Cesco et al 2018;Silva et al 2018a). For pre-emergence application, injury in soybeans is less common, but can also be observed, but in general without compromising agronomic performance (Belfry et al 2015;Priess et al 2020), as observed in the present study.…”

Section: Resultssupporting

confidence: 67%

“…In some situations, as in this study, these herbicides have reduced plant height, which makes plants less susceptible to lodging. Cesco et al (2018) reported a reduction in the height of soybean plants for the post-emergence application of chlorimuron (17.5 g active ingredient [a.i.] ha -1 ) + glyphosate.…”

Section: Resultsmentioning

confidence: 99%

Growth and agronomic performance of soybean applied with pre-emergence herbicides

Albrecht,

Novakoski

et al. 2023

Rev. Fac. Nac. Agron. Medellín

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Among the factors that limit the productive potential of soybean crops, stands out lodging, in addition to competition with weeds. Given this, the importance of soybean pre-emergence herbicides for different purposes is highlighted; however, they have to be evaluated for selectivity. This study aimed to evaluate the growth and agronomic performance of soybean applied with pre-emergence herbicides. Experiment 1 was conducted in the 2017-2018 season at two locations, and experiment 2 in the 2016-2017 season at one location. Treatments consisted of the application of pre-emergence herbicides in soybean in a randomized block design with four replications. Crop injury and chlorophyll indices (experiment 1) and variables related to agronomic performance (experiments 1 and 2) were assessed. Diclosulam and chlorimuron showed potential for application at pre-emergence to reduce plant height and consequently plant lodging. Moreover, diclosulam, chlorimuron, sulfentrazone, flumioxazin, s-metolachlor, pendimethalin, trifluralin, imazethapyr/flumioxazin, and oxyfluorfen did not negatively affect agronomic performance when applied at pre-emergence of soybean. This study evidenced the selectivity of pre-emergence herbicides to soybean.

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“…This effect may be directly associated with energy reallocation from root growth towards recovery from the phytotoxicity induced by lactofen. Santos et al (22) found reduced development of soybean roots when subjected to high doses of glyphosate, indicating that interference or phytotoxicity can lead to decreased root development. As well as, besides phytotoxicity, soybean plants submitted to application of the lactofen plus glyphosate showed lower plant height (23).…”

Section: Resultsmentioning

confidence: 99%

Grain productive efficiency of soybean plants under lactofen application

2020

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Adverse factors cause a decrease in the productive potential of crops. For soybean [(Glycine max (L.) Merrill], the excessive growth is a factor that results in plants with low effective efficiency. Thus, plants with an architecture that favours greater interception of solar radiation and deposition of pesticides tend to be more productive. The objective of this study is to evaluate the different application of lactofen, which is used as a growth inhibitor, improve the productive efficiency of soybeans by increasing the biological activity of the leaves. The study was conducted in the field with soybean cultivars NA 5909 RG and BMX Potência RR. The experiment followed a randomized complete block design with four treatments and five replicates: T1: control; T2: application of 140 g a.i ha-1 of lactofen in phenological stage V3; T3: application of 140 g a.i ha-1 of lactofen in phenological stage V6; and T4: application of 70 g a.i ha-1 of lactofen in phenological stage V3 + 70 g a.i ha-1 of lactofen in phenological stage V6. The interception of photosynthetically active radiation in the lower layer increased in all treatments. Lactofen application increased the percent area covered and the number of phytosanitary products spray droplets per cm² in the middle and lower layers of the plants. The lower third of the plants experienced the greatest effect of the treatments with regard to the number of pods, grains and grain weight, with treatment T2 presenting significant increases. The use of lactofen as a growth inhibitor at the beginning of pod development in soybean caused changes to plant architecture and root development, consequently enhanced the productive efficiency of the plant, primarily due to increased grain production in the lower layer. Future research using lactofen in different phenological stages and cultivars may provide more insights in to the performance of this growth inhibitor in soybean.

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Associations Between Herbicides and Glyphosate in Agronomic Performance of RR2 Intact Soybean

Cited by 3 publications

References 13 publications

Seletividade de herbicidas pós-emergentes isolados ou associados a fertilizante foliar na cultura da soja

Seletividade de herbicidas pós-emergentes isolados ou associados a fertilizante foliar na cultura da soja

Growth and agronomic performance of soybean applied with pre-emergence herbicides

Grain productive efficiency of soybean plants under lactofen application

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