Trunk injection of plant protection products to protect trees from pests and diseases

Berger, C.; Laurent, François

doi:10.1016/j.cropro.2019.05.025

Cited by 67 publications

(80 citation statements)

References 87 publications

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“…The presence of oxytetracycline in the phloem indicated that oxytetracycline transported in the xylem could be redistributed into the phloem by bidirectional exchange [ 17 ]. Since trunk injection of oxytetracycline is more efficient than the foliar spray and soil drench application methods, and has several advantages over these two application methods [ 24 ], trunk injection would be the best method for the delivery of antibiotics into ‘ Ca . L. asiaticus’-infected trees.…”

Section: Discussionmentioning

confidence: 99%

“…In this method, chemicals are applied to the soil in excess amount around the tree in order to be taken up by the roots [ 23 ]. Soil drenching is used for many insecticides including neonicotinoids, which are used to control D. citri [ 24 ]. However, only a small fraction of the chemical is taken up by plants from the root zone, and the rest may persist in the soil long-term, which could have adverse environmental effects.…”

Section: Introductionmentioning

confidence: 99%

“…However, only a small fraction of the chemical is taken up by plants from the root zone, and the rest may persist in the soil long-term, which could have adverse environmental effects. Due to these risks for the environment and for human health, trunk injection was developed as an alternative method [ 24 ]. Trunk injections are widely used in urban areas where sprays and soil drench techniques are impractical, prohibited, or restricted [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…Due to these risks for the environment and for human health, trunk injection was developed as an alternative method [ 24 ]. Trunk injections are widely used in urban areas where sprays and soil drench techniques are impractical, prohibited, or restricted [ 24 ]. Tree trunk injection offers several advantages over foliar spray and soil drench methods: a) it provides an accurate dose; b) there is no soil deposition, drift loss, or abiotic or biotic degradation; c) it reduces non-target impacts and user exposure; d) it can control borer insects that feed under the bark, e) longer persistence of action means fewer treatments per year; f) and fewer applications may make trunk injections a more affordable investment [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Adjuvants on Oxytetracycline Uptake upon Foliar Application in Citrus

et al. 2020

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Recently in Florida, foliar treatments using products with the antibiotics oxytetracycline and streptomycin have been approved for the treatment of citrus Huanglongbing (HLB), which is caused by the putative bacterial pathogen ‘Candidatus Liberibacter asiaticus’. Herein, we assessed the levels of oxytetracycline and ‘Ca. L. asiaticus’ titers in citrus trees upon foliar applications with and without a variety of commercial penetrant adjuvants and upon trunk injection. The level of oxytetracycline in citrus leaves was measured using an oxytetracycline ELISA kit and ‘Ca. L. asiaticus’ titer was measured using quantitative PCR. Low levels of oxytetracycline were taken up by citrus leaves after foliar sprays of oxytetracycline in water. Addition of various adjuvants to the oxytetracycline solution showed minimal effects on its uptake by citrus leaves. The level of oxytetracycline in leaves from trunk-injected trees was higher than those treated with all foliar applications. The titer of ‘Ca. L. asiaticus’ in the midrib of leaves from trees receiving oxytetracycline by foliar application was not affected after four days and thirty days of application, whereas the titer was significantly reduced in oxytetracycline-injected trees thirty days after treatment. Investigation of citrus leaves using microscopy showed that they are covered by a thick lipidized cuticle. Perforation of citrus leaf cuticle with a laser significantly increased the uptake of oxytetracycline, decreasing the titer of ‘Ca. L. asiaticus’ in citrus leaves upon foliar application. Taken together, our findings indicate that trunk injection is more efficient than foliar spray even after the use of adjuvants. Our conclusion could help in setting useful recommendations for the application of oxytetracycline in citrus to improve tree health, minimize the amount of applied antibiotic, reduce environmental exposure, and limit off-target effects.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Adjuvants on Oxytetracycline Uptake upon Foliar Application in Citrus

et al. 2020

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“…Although containment strategies for ambrosia beetles control include the use of insecticides ( Jones & Paine, 2018 ), overseas commercialisation of Mexican avocados (Hass variety) restricts pesticide application to this crop ( , accessed by 27 November 2019). In fact, legislation in the USA and Europe has led to use-restrictive or use-elimination for many pesticides ( Carrillo, Crane & Peña, 2013 ; Jones et al, 2017 ; Berger & Laurent, 2019 ). Biological control is an alternative strategy against ambrosia beetle ( Hughes et al, 2015 ; Dunlap et al, 2017 ; SENASICA, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Selection ofBeauveria bassiana(Hypocreales: Cordycipitaceae) strains to controlXyleborus affinis(Curculionidae: Scolytinae) females

Castrejón-Antonio

Tamez‐Guerra

Montesinos-Matías

et al. 2020

PeerJ

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Background Xyleborus affinis Eichhoff (Coleoptera: Curculionidae) is an ambrosia beetle reported to affect avocado trees (Persea americana Mill.). The use of the entomopathogenic fungus (EPF) Beauveria bassiana (Bals.-Criv.) Vuill. for ambrosia beetle control represents an alternative to insecticides. Methods This study was designed in two stages to select B. bassiana strains with potential to control X. affinis females. In the first stage, 19 B. bassiana Mexican strains from EPF collection, isolated from Coleoptera (CHE-CNRCB, http://www.gob.mx/senasica/documentos/coleccion-de-hongos-entomopatogenos), were tested. Analyses included radial growth rate, conidial yield, spore germination, and germ tube length. Results were analysed by Principal Component Analysis (PCA) to identify clusters within favourable growth phenotypes. For the second stage, 10 selected strains were re-analysed for virulence-related metabolic characteristic, including cell wall-bound cuticle-degrading enzymes–Pr1-like proteases and β-N-acetyl glucosaminidases (NAGase) chitinases, conidial hydrophobicity and monopolar germination parameters. A second PCA analysis was run for those virulence parameters analysed, and upon results strains CHE-CNRCB 44, 171, 431 and 485 were selected and tested against X. affinis females. Females were treated with a 1 × 108 conidia mL−1 suspension (recommended rate), using a Potter Tower. Results All strains showed insecticidal activity, inducing up to 58% mortality; about 30% dead beetles developed aerial mycelia (CHE-CNRCB 485) and the fastest mortality rate was t0 = 1.95 (CHE-CNRCB 44). Conclusion Since all selected strains showed virulence against X. affinis females, results indicated the possibility of selecting B. bassiana strains based on multiple metabolic attributes, as a preliminary test to perform bioassays against order-related target insects.

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Enhancing Stability and Efficacy of Trichoderma Bio‐Control Agents Through Layer‐by‐Layer Encapsulation for Sustainable Plant Protection

Løvschall,

Velasquez,

Kowalska

et al. 2024

Advanced Sustainable Systems

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Agricultural fungicide pollution poses a significant environmental challenge and causes adverse effects on human health. Therefore, strategies to limit fungicide usage are of paramount importance. Trichoderma fungi, due to their antagonistic activity against various pathogenic fungi, have shown potential as a sustainable alternative to chemical fungicides. However, bio‐control agents like Trichoderma are vulnerable to physical stimuli and show diminished efficacy during prolonged storage. To address these challenges, a mild and scalable encapsulation method for Trichoderma spores is introduced, employing a layer‐by‐layer (LbL) approach using biobased lignin derivatives. It is demonstrated that the LbL encapsulation technique significantly improved spore stability relative to naked spores, even under adverse conditions including extreme temperatures and prolonged exposure to Ultraviolet (UV) irradiation. Notably, encapsulated Trichoderma spores showed enhanced efficacy in cultivating tomato plants compared to naked spores. Additionally, the findings revealed that the in planta efficacy of encapsulated spores is dependent on the specific Trichoderma strain used. This study suggests that Trichoderma spores encapsulated with lignin through the LbL approach, are a promising and sustainable alternative to chemical fungicides with potential for commercialization.

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Trunk injection of plant protection products to protect trees from pests and diseases

Cited by 67 publications

References 87 publications

Effect of Adjuvants on Oxytetracycline Uptake upon Foliar Application in Citrus

Effect of Adjuvants on Oxytetracycline Uptake upon Foliar Application in Citrus

Selection ofBeauveria bassiana(Hypocreales: Cordycipitaceae) strains to controlXyleborus affinis(Curculionidae: Scolytinae) females

Enhancing Stability and Efficacy of Trichoderma Bio‐Control Agents Through Layer‐by‐Layer Encapsulation for Sustainable Plant Protection

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