Physiological effects of strobilurin and carboxamides on plants: an overview

Amaro, Amanda Cristina Esteves; Báron, Daniel; Ono, Elizabeth Orika; Rodrigues, João Domingos

doi:10.1007/s11738-019-2991-x

Cited by 39 publications

(38 citation statements)

References 57 publications

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“…Indeed, for this cultivar, the higher N uptake ability discussed above decreased under strobilurin treatment. This result disagreed with the literature, in which it is reported that strobilurin fungicides can increase soil N uptake [57,59]. Furthermore, Khole et al [22] reported that strobilurin stimulated nitrate uptake in hydroponically grown wheat plants.…”

Section: Strobilurin Effectcontrasting

confidence: 73%

“…This is contrary to the best-known negative relationship between protein concentration and yields of wheat cultivars [10,69,70]. The improvement in the duration of grain N accumulation during grain filling following strobilurin application, as shown by the increase in the SPAD values, probably helped to maintain grain protein concentration, as yield increased [71], confirming that the effect of strobilurin on protein concentration is small [57].…”

Section: Strobilurin Effectmentioning

confidence: 63%

“…Usually, fungicides are used to control and prevent diseases; in this paper, strobilurin treatment was considered only to evaluate its physiological effects [55][56][57], as the weather conditions recorded in the two years of study were not favorable to fungal diseases. The SPAD values recorded during the grain filling period confirmed that strobilurin had an effect on the duration of the wheat canopy [58] and therefore on the duration that the plant remained green [59][60][61], probably due to the reduction of ethylene synthesis and the protective effect of the antioxidative system [62], which postpones the degradation of chlorophyll and therefore the yellowing of the leaves [63].…”

Section: Strobilurin Effectmentioning

confidence: 99%

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Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

et al. 2020

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In wheat, the increase in nitrogen use efficiency (NUE) and optimization of the nitrogen doses to be used are both very important aspects for improving sustainable and productive agriculture. The aim of this study was to investigate, under rainfed Mediterranean conditions, the influence of strobilurin treatment and N fertilization on durum wheat N use efficiency for yield (NUEy) and protein (NUEp) and on the contribution of their components, nitrogen uptake efficiency (UPE) and nitrogen utilization efficiency (NUtE). Two durum wheat cultivars (Saragolla and Sfinge) were grown for two years in field conditions under five nitrogen treatments (60 kg ha−1 N60; 90 and 120 kg ha−1 given two and three times; N90, N90T3, N120 and N120T3) comparing a control without strobilurin treatment (ST0) and one application of strobilurin (STaz). In Sfinge, STaz caused a decrease in UPE and NUEp and an increase in NUtE and NUEy. In Saragolla, the opposite behavior was observed. Moreover, strobilurin positively affected the contribution of UPE and negatively that of NUtE to NUEy only in Saragolla. Furthermore, strobilurin determined higher NUEy and NUEp values under most of the N treatments adopted in the drier year. With this study, we supported the hypothesis that in Mediterranean conditions, the possibility of reducing N rate application from 120 to 90 kg ha−1 with a strobilurin-based treatment, even in the absence of fungal diseases, could represent a useful agronomic strategy for durum wheat grown under drought conditions as those predicted under the ongoing climate change.

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Section: Strobilurin Effectcontrasting

confidence: 73%

Section: Strobilurin Effectmentioning

confidence: 63%

Section: Strobilurin Effectmentioning

confidence: 99%

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Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

et al. 2020

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“…All nonpenetrating fungicides should be considered preventive o protectant agents. Some penetrating fungicides (strobilurins and carboxamides) can also have preventive or protective action (Bartlett et al, 2002;Amaro et al, 2019). This is explained by their mechanism of action based on the inhibition of mitochondrial respiration, a process that is critical during germination of spores.…”

Section: Protectant or Preventive Fungicidementioning

confidence: 99%

Role of Fungicide Applications on the Integrated Management of Wheat Stripe Rust

et al. 2020

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First described in Europe in 1777, stripe rust (SR) caused by Puccinia striiformis Westend. f. sp. tritici Erikss (Pst) is one of the most important and destructive diseases of wheat worldwide. Until 2000, SR was mainly endemic to cooler regions, but since then, new aggressive strains have emerged, spread intercontinentally, and caused severe epidemics in warmer regions across the world. This has put SR as a disease that poses a threat to the world food security. At present, the preferred strategy for control of SR is the access to wheat cultivars with adequate levels of SR resistance. However, wheat breeding programs are not sufficiently advanced to cope with the recently emerged Pst strains. Under this scenario, foliar fungicide applications have become an important component of SR management, but information on the effects of fungicide applications on SR control and wheat cultivar yield response is scarce. This review seeks to provide an overview of the impact and role of fungicides on SR management. With focus on wheat management in the major wheat-growing regions of the world, the review addresses: (a) the efficacy of different fungicide active ingredients, optimal fungicide timing and number of applications in controlling SR, and (b) the impact of fungicide on wheat grain yield response. Inclusion of fungicides in an integrated crop management approach is discussed.

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“…A direct crop enhancement effect of fungicide seed dressing may be related to the physiological effect that certain fungicide compounds could exert on plants, even in the absence of a fungal infection. Strobilurins have been shown to induce physiological benefits for different crops, such as longer-lasting green leaf tissue and delayed plant senescence (stay green effect), through a reduction in oxidative stress [36], an increase in photosynthesis efficiency, for higher true photosynthesis, and a reduction in dark respiration [37]. Enhanced maize performance, even in the absence of disease, has also been reported for foliar applications of azoxystrobin [38] and pyraclostrobin [39] from the stem elongation stage to flowering.…”

Section: Discussionmentioning

confidence: 99%

Role of the Fungicide Seed Dressing in Controlling Seed-Borne Fusarium spp. Infection and in Enhancing the Early Development and Grain Yield of Maize

et al. 2020

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Fusarium spp. are key pathogens in maize seeds and seedlings. The aim of this study has been to evaluate the effects of applying fungicides to maize seeds to increase the survival of seedlings and to enhance the early vigor and grain yield of the plants. The protective effects of 2-way (fludioxonil, metalaxil-M) and four-way (fludioxonil, metalaxil-M, azoxystrobin, thiabendazole) fungicide seed treatments were compared with an F. verticillioides seed infected control in 11 field trials carried out in North Italy. A second study focused on the impact F. verticillioides and F. graminearum seed-borne infection on plant growth and on the possible advantages of applying the previously reported seed dressing. The seed dressing increased the plant density, vigor during the whole vegetative growth cycle for all the production situations, and grain yield. F. verticillioides led to a higher seedling mortality than F. graminearum, while both species reduced plant growth and delayed the flowering date. Seed-borne infection has an important impact on both the population and vigor of maize plants. The four-way fungicide enhanced both the defense of the seedlings and the vigor of F. verticillioides infected plants, which in turn resulted in a significant improvement in grain yield, compared to a conventional two-way fungicide.

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Physiological effects of strobilurin and carboxamides on plants: an overview

Cited by 39 publications

References 57 publications

Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

Strobilurin Effects on Nitrogen Use Efficiency for the Yield and Protein in Durum Wheat Grown Under Rainfed Mediterranean Conditions

Role of Fungicide Applications on the Integrated Management of Wheat Stripe Rust

Role of the Fungicide Seed Dressing in Controlling Seed-Borne Fusarium spp. Infection and in Enhancing the Early Development and Grain Yield of Maize

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