Bottom-up effect of nitrogen fertilization on the density of the corn leafhopper and its impact on both disease incidence and natural parasitism

Virla, Eduardo Gabriel; Albarracin, Erica Beatriz Luft; Díaz, Cecilia; Nieuwenhove, Guido A. Van; Fernández, Franco D.; Aráoz, María Victoria Coll; Melchert, Nicolás A.; Conci, Luis Rogelio; Pecci, María de la Paz Giménez

doi:10.1007/s10340-022-01500-9

Cited by 9 publications

(4 citation statements)

References 60 publications

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“…Therefore, resource quality is lost in the final plant development stage, potentially harming D. maidis populations. Furthermore, the population levels of D. maidis per plant in our study were similar to the results found by Virla et al 35 . On the other hand, a study carried out by Khan et al 36 .…”

Section: Resultssupporting

confidence: 92%

“…[32][33][34] Therefore, resource quality is lost in the final plant development stage, potentially harming D. maidis populations. Furthermore, the population levels of D. maidis per plant in our study were similar to the results found by Virla et al 35 On the other hand, a study carried out by Khan et al 36 in the Hazara division, Khyber Pakhtunkhwa, Pakistan, found an average density per corn season of 1.33 adults of D. maidis per plant. This result was significantly superior to the results found in our study.…”

Section: Dynamic Of Insect and Disease Incidencesupporting

confidence: 91%

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Distribution of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) and incidence of maize rayado fino virus and Candidatus Phytoplasma asteris in corn succession planting systems

Cunha

Veloso

Araújo

et al. 2023

Pest Management Science

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BACKGROUND Corn is one of the main crops grown globally to produce food for human consumption and animal feed, including raw materials for bioenergy. Effective pest management is critical for the economic viability of corn production. The leafhopper Dalbulus maidis and the diseases transmitted by it have become relevant to corn production. Our study aimed to determine environmental parameters that affect D. maidis populations and the impacts of pathogen dispersion on corn productivity under different rotation systems and sowing seasons. RESULTS The population density of leafhoppers found in the studied crops was low but capable of establishing the diseases and spreading them widely in the crops. The leafhopper's highest occurrence was in the corn vegetative development stage, and its population peaks were earlier in the corn off‐season. The incidence of maize rayado fino virus and maize bushy stunt phytoplasma were higher in corn off‐season than in the growing season. The incidence of diseases was higher in the final stages of the cultivation cycle. Yield losses were significantly higher for maize bushy stunt phytoplasma and not significant for maize rayado fino virus. CONCLUSION Our study observed that corn's physiological stage was the main factor influencing D. maidis dynamics. The occurrence of D. maidis at low densities was sufficient to ensure the efficient transmission and dissemination of maize rayado fino virus and maize bushy stunt phytoplasma, which had a higher incidence in the reproductive stage and the corn sowed off‐season. © 2023 Society of Chemical Industry.

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Section: Resultssupporting

confidence: 92%

Section: Dynamic Of Insect and Disease Incidencesupporting

confidence: 91%

Distribution of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) and incidence of maize rayado fino virus and Candidatus Phytoplasma asteris in corn succession planting systems

Cunha

Veloso

Araújo

et al. 2023

Pest Management Science

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“…Power (1989) indicó que la fertilización nitrogenada afectaba el crecimiento del maíz, pero este hecho no impactaba en la abundancia de D. maidis; más tarde Schetino Bastos et al (2007) reportaron para Brasil una relación directa entre el contenido de nitrógeno en las hojas de maíz y el número de ninfas y adultos del vector. En un trabajo de campo llevado a cabo en el pedemonte tucumano (Virla et al, 2022), verificamos el efecto de tres niveles de fertilización nitrogenada (100, 200 y 300 ppm) en la densidad poblacional del vector, los niveles de control por parasitoides de huevos y la incidencia del "raquitismo" del maíz. Encontramos que la fertilización nitrogenada influye directa y significativamente en la densidad del vector, después de 10 días de su aplicación y, en línea con esto las tasas de parasitismo por parasitoides oófilos fue mayor en las parcelas más fertilizadas.…”

Section: Influencia Del Manejo Del Cultivo En Aspectos Biológicosunclassified

Miscelanea 152 (2024): Dalbulus maidis (Hemiptera: Cicadellidae), vector of corn stunt disease: Relevant biological aspects, with special reference to knowledge generated in Argentina

Virla

2024

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Due to its frequency, abundance in crops, and remarkable capacity to efficiently transmit at least four pathogens, Dalbulus maidis stands out as one of the most significant threats to maize crops in Latin America. The recent population outbreak of this pests observed in Argentina has highlighted its potential to cause significant damage to maize crops, with estimated losses reaching up to 80%. Consequently, one of the most pressing needs is to integrate and disseminate fundamental knowledge on various bioecological aspects of this vector to researchers, technicians and stakeholders interested in maize crop health. This contribution is a summary of the knowledge on the main biological characteristics of the vector acquired over more than 50 years. Among other topics, the provided information encompasses its identification, biological traits, distribution, pest significance, life cycle and development, voltinism, host plants, behaviors, and natural enemies. All this information is crucial for developing an effective pest management program in Argentina.

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“…One possible explanation for the lower yield with 400 kg N/ha could be N toxicity, where excessive N can lead to imbalances in nutrient uptake and negatively impact plant growth (Vitousek et al, 2009;Guo et al, 2019;Aliyu et al, 2021). Additionally, high levels of N can also contribute to increased susceptibility to diseases and pests (Szulc et al, 2008;Huber et al, 2012;Veromann et al, 2013;Virla et al, 2023).…”

Section: -Impact Of Nitrogen Fertilizationmentioning

confidence: 99%

Enhancing maize productivity under abiotic stresses through the combined use of nitrogen, potassium humate, and zinc

Abdelhamid,

El-Sadek,

A. Shoman

2024

IJEAB

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The soils found in the Kharga oasis in Egypt have been identified as having low levels of nitrogen and organic matter, along with high pH and salinity. These conditions make it difficult for the plants to absorb essential micronutrients. In order to address this issue, a study was conducted with the main objective of evaluating the interactive effect of potassium humate, zinc, and nitrogen fertilization on the grain yield of maize and its various components. The study consisted of two field experiments that took place during the growing seasons of 2022 and 2023 at the research station of the Desert Research Center in Kharga, located in the western desert of Egypt. The treatments in the experiments involved three different levels of potassium humate and zinc combinations, including 20 kg/ha of potassium humate, 375 ppm of zinc, and a combination of both, which were compared to a control group. Additionally, four levels of nitrogen fertilization were applied, ranging from 100 to 400 kg/ha. The results of the study revealed that the highest and most significant grain yields were observed in both seasons when potassium humate and zinc were applied together, resulting in yields of 10,436 and 10,590 kg/ha in the first and second seasons, respectively. Furthermore, it was found that the highest significant grain yields in both seasons were achieved by applying 300 kg of nitrogen per hectare, with yields of 9423 and 9196 kg/ha in the first and second seasons, respectively. These findings suggest that the combination of nitrogen fertilization with potassium humate and zinc proves to be effective in maximizing the grain yield of maize. This information is valuable for farmers and researchers in the Kharga oasis, as it provides insights into the optimal fertilization practices that can enhance crop productivity in this specific region with challenging soil conditions.

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Bottom-up effect of nitrogen fertilization on the density of the corn leafhopper and its impact on both disease incidence and natural parasitism

Cited by 9 publications

References 60 publications

Distribution of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) and incidence of maize rayado fino virus and Candidatus Phytoplasma asteris in corn succession planting systems

Distribution of Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae) and incidence of maize rayado fino virus and Candidatus Phytoplasma asteris in corn succession planting systems

Miscelanea 152 (2024): Dalbulus maidis (Hemiptera: Cicadellidae), vector of corn stunt disease: Relevant biological aspects, with special reference to knowledge generated in Argentina

Enhancing maize productivity under abiotic stresses through the combined use of nitrogen, potassium humate, and zinc

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