Field validation of TOMCAST modified to manage Septoria leaf spot on tomato in the central-west region of Brazil

Ávila, Mylla Crysthyan Ribeiro; Junior, V. Lourenço; Quezado-Duval, A. M.; Becker, Walter Ferreira; Abreu-Tarazi, Monita Fiori de; Borges, Lino Carlos; Nascimento, Abadia dos Reis

doi:10.1016/j.cropro.2020.105333

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…Yield losses caused by this pathogen are mainly associated with reduced photosynthetic activity and plant growth, as well as the formation of low-quality fruits. In periods when temperatures are above 25 °C in combination with heavy rainfall, especially in the summer, yields can be reduced by more than 50% [ 23 ]. Symptoms appear on the leaves in the form of circular, elliptical necrotic lesions with brown to grey centres [ 24 ].…”

Section: Tomato Diseases and Pathogensmentioning

confidence: 99%

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Karačić,

Miljaković,

Marinković

et al. 2024

Microorganisms

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Tomatoes encounter many pathogens, such as fungi and bacteria, which reduce the yield and quality of plants and lead to large losses in production. The application of plant protection products (PPPs) is still an important and most effective measure to control plant diseases. However, the use of chemicals in agriculture contributes to environmental pollution and biodiversity loss, and it can also threaten non-target living organisms. Biological control is a widely accessible, environmentally safe, and cost-efficient alternative for the prevention and suppression of plant diseases. Bacillus species with antimicrobial and plant growth-promoting effects are most frequently used as biocontrol agents to increase the resilience of agricultural production against biotic stresses. The present review discusses the antagonistic mechanisms and the biocontrol potential of Bacillus spp. against tomato diseases caused by different pathogens. The main mechanisms of Bacillus spp. include the production of antimicrobial compounds (antibiotics, extracellular enzymes, siderophores, and volatile compounds), competition for nutrients and space, and induced systemic resistance (ISR). Although Bacillus-based PPPs have been developed and commercialised worldwide for various crops and pathogens, the efficiency issues are still subject to debate. Additionally, a combined strategy for controlling tomato diseases based on Bacillus spp. and other available methods (conventional or natural-based) is a promising research field.

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Section: Tomato Diseases and Pathogensmentioning

confidence: 99%

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Karačić,

Miljaković,

Marinković

et al. 2024

Microorganisms

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“…Disease incidence tends to increase significantly during the summer when temperatures reach their peak and precipitation is high. When temperatures exceed 25°C and leaves remain wet for extended periods, tomato yields can decrease by more than 50% [129]. The pathogen primarily spreads through contaminated seeds, but it can also survive in crop debris for extended periods [130].…”

Section: Septoria Leaf Spot Diseasementioning

confidence: 99%

Management of Phytopathogens by Antagonistic Bacillus spp in Tomato Crop

Iqbal,

Li,

Ahmed Rajput

et al. 2024

Tomato Cultivation and Consumption - Innovation and Sustainability

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Bacillus is a genus of gram-positive bacteria that is widely distributed in the environment. The species of this genus present in the endosphere, phyllosphere and rhizosphere in the plant and perform as a beneficial biocontrol agent and promote plant health. These strains exhibit diverse capabilities, including the potentiality to directly suppress the germination of microbial, stimulate plant development, reduce pathogen infections, degrade different types of hydrocarbons, function effectively across a wide temperature range, and induce immune resistance in host plants. The species/strains of Bacillus genus have proven promising biocontrol agents against a large number of fungal and bacterial causal organism, as well as plant-damaging insects. They induce a wide range of composites with antifungal properties, such as iturin, surfactin, cyclic lipopeptides, bacillomycin, bacteriocins, polyketide, lentibiotics, phospholipid, polyketide microlectine, isocosmarin and amino sugar. These compounds play a crucial role in preventing and controlling diseases in plants. The synthesis of these compounds is initiated in response to the presence of bacterial and fungal pathogen biomass and their cell walls. The purpose of this review is to offer a thorough exploration of the disease suppression mechanisms utilized by Bacillus, with a specific emphasis on their function as plant growth-promoting rhizobacteria (PGPR).

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“…In this trial, the physiological days value was increased from the potato sowing stage [29,30] to 300, the calculation of the fungicide application threshold was started, and the TOMCAST threshold (15) was used for fungicide application. The TOMCAST threshold was selected based on previous studies in which the TOMCAST threshold (15) could achieve the best effect [10,12]. The TOMCAST model was originally designed to be located at the University of Pennsylvania [14]; therefore, we downloaded data from the nearest meteorological site at the Pennsylvania State University Plant Pathology farm in the pre-experimental phase of the study to compare with meteorological data from the Zhangbei site in the Bashang grassland of Hebei Province, China, in the same year and found that the average summer (May-September) temperatures at the two sites differed by approximately 4 • C. In addition, we analyzed the pre-experiment data in 2019 and found that the lowest temperature with a relative humidity greater than 88% at the test site was 7.02 • C, as required in the TOMCAST model for average temperature, hours with RH greater than 88%, RH, and total rainfall data.…”

Section: The Tomcast Model Implementationmentioning

confidence: 99%

“…The use of a decision support system (DSS) to reduce crop losses can rationalize their use [4,11]. Simultaneously, using DSS can reduce the number of fungicide sprays while providing better disease control [12].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the Applicability of the TOMCAST Model for the Control of Potato Early Blight in China

Zhang

et al. 2023

Plants

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To explore the applicability of different fungicide application schemes to control potato early blight (mainly caused by Alternaria solani) in China, field trials were conducted from 2020 to 2022, combining different fungicides with the tomato forecaster (TOMCAST) model and using weather variables to adjust the minimum temperature of TOMCAST to 7 °C. To effectively manage potato early blight, the TOMCAST model combines relative humidity (>88%) and air temperature to calculate daily severity values (DSVs). The application of fungicides (fungicide schedule) is as follows: untreated; two standard treatments, Amimiaoshou SC and Xishi SC, applied at the first appearance of disease symptoms; and two different TOMCAST treatments, in which fungicides are applied when the physiological days add up to 300 days and DSVs add up to 15. This study quantifies the intensity of early blight as the area under the disease progression curve and the final disease severity. Additionally, a progress curve for early blight is constructed to compare the development of early blight in different years and treatments. The TOMCAST-15 model reduces the number of fungicide applications in addition to significantly suppressing the development of early blight. Furthermore, fungicide application significantly increases the dry matter and starch contents of potatoes, and TOMCAST-15 × Amimiaoshou SC has similar enhancement effects on dry matter, protein, reducing sugar, and starch contents compared with Amomiaohou SC and Xishi SC. As a result, TOMCAST × Amimiaoshou SC may be an effective alternative to the standard treatment and have good applicability in China.

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Field validation of TOMCAST modified to manage Septoria leaf spot on tomato in the central-west region of Brazil

Cited by 6 publications

References 17 publications

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Management of Phytopathogens by Antagonistic Bacillus spp in Tomato Crop

Evaluating the Applicability of the TOMCAST Model for the Control of Potato Early Blight in China

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