Leveraging the Ecology of Invertebrate Pathogens in Microbial Control

Dara, Surendra K.; Goble, Tarryn A.; Shapiro‐Ilan, David I.

doi:10.1002/9781119256106.ch13

Cited by 9 publications

(7 citation statements)

References 133 publications

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“…These formulations must achieve high functionality under a range of environmental conditions. This can be done by (1) maximizing their distribution on the plant canopy, (2) protection against UV, (3) maintaining microenvironmental humidity control, and (4) increasing their shelf life. , The microencapsulation of biopesticides using Pickering emulsions and colloidosomes constitutes an excellent candidate for tailoring new advanced formulations with high protection performance. Pickering emulsions make it possible to tune the emulsion properties in terms of droplet diameter and proper surface functionalization of the NPs to achieve high activity and a prolonged shelf life of the incorporated microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Single Cell Encapsulation via Pickering Emulsion for Biopesticide Applications

et al. 2018

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A new approach for single cell microencapsulation in an oil-in-water (o/w) Pickering emulsion is presented. The water/paraffin emulsions were stabilized by amine-functionalized silica nanoparticles. The droplet size of the emulsions was highly tunable, and ranged from 1 to 30 μm in diameter. The controllable droplet size along with the high colloidal stability of the Pickering emulsionswas harnessed to obtain single cell microencapsulation. Successful encapsulation of the conidia entomopathogenic fungus Metarhizium brunneum by the studied Pickering emulsions was confirmed via confocal laser scanning microscopy. The resulting systems were implemented to develop a novel biopesticide formulation for arthropod pest control. The conidia incorporated in the emulsions were applied to Ricinus communis leaves by spray assay. After drying of the emulsion, a silica-based honeycomb-like structure with an ordered hierarchical porosity is formed. This structure preserves the individual cell encapsulation. The successful single cell encapsulation has led to a high distribution of conidia cells on the leaves. The Pickering emulsion-based formulation exhibited significantly higher pest control activity against Spodoptera littoralis larvae compared to the control systems, thus making it a promising, cost-effective, innovative approach for tackling the pest control challenge.

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Section: Introductionmentioning

confidence: 99%

Single Cell Encapsulation via Pickering Emulsion for Biopesticide Applications

et al. 2018

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“…The use of biocontrol agents, such as entomopathogens, also offers opportunities to reduce chemical insecticide applications. For example, entomopathogenic fungi and nematodes have proven to be useful components of integrated pest management programs and good alternatives to synthetic chemical insecticides 20 . Several myco‐insecticides have been available to control onion thrips in screenhouses 21 .…”

Section: Introductionmentioning

confidence: 99%

Efficacy of entomopathogenic fungi, nematodes and spinetoram combinations for integrated management ofThrips tabaci

Wakil

Gulzar

Prager

et al. 2023

Pest Management Science

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BACKGROUND: Two consecutive field trials using a blend of entomopathogens in combination with a new chemistry insecticide were conducted to determine treatment effects on onion thrips (Thrips tabaci Lindeman) populations, crop damage, plant development, crop yield and impact on natural enemies. Products were tested in an onion cropping system and included the insect pathogenic fungus Beauveria bassiana (isolate WG-11), an entomopathogenic nematode Heterorhabditis bacteriophora (strain VS) and the new-chemistry chemical insecticide spinetoram.RESULTS: In all treatments, a significant decrease in thrips per plant population was detected in both trials. Overall, dual application of entomopathogens and insecticide was more effective than singly applied treatments. The lowest number of thrips larvae (1.96 and 3.85) and adults (0.00 and 0.00) were recorded when treated with dual application of B. bassiana and spinetoram at 7 days post application (DPA) after the second spray application in 2017and 2018, respectively. Damage on onion plants was considerably decreased in all treatments relative to the control. The lowest damage was observed on onion plants treated with B. bassiana + spinetoram at 7 DPA after the second spray application during both years. A significant decrease in the number of natural enemies (beetles, spiders, mites, lacewings, ants and bugs) on onion plants was recorded during both years. Insect pathogens when applied alone and in combination with each other considerably protected arthropod natural enemies compared to insecticide application applied alone. Significant increase in plant agronomic traits was observed compared to the control. Among all the treatments, B. bassiana + spinetoram produced maximum leaf length, leaf weight, total leaves, neck diameter, bulb diameter, number of rings per bulb, bulb weight, dry matter and plant yield following the 2017and 2018 applications, respectively. CONCLUSION: The findings of the study reveal the potential of using insect pathogens and insecticide for control of T. tabaci. However, combinations containing spinetoram are harmful to nontarget organisms, whereas biological control agents help in protecting biodiversity in onion agroecosystems.

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“…Also, Beauveria bassiana (strain JLGZL‐14) reduces the reproductive success of surviving P. operculella , and therefore successful application of B. bassiana can reduce subsequent population growth (Yuan et al ., 2018). However, fungal conidia are highly sensitive to environmental conditions, and must be properly dispersed and delivered to appropriate substrates for effective pest control (Jaronski, 2009; Dara et al ., 2017; Van Lenteren et al ., 2017). Therefore, effective application methods that protect fungal conidia against adverse environmental stresses must be developed to promote biological control of P. operculella .…”

Section: Introductionmentioning

confidence: 99%

Establishment of Beauveria bassiana as a fungal endophyte in potato plants and its virulence against potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae)

Zhang

Yan

et al. 2022

Insect Science

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The potato tuber moth, Phthorimaea operculella, is the most damaging potato pest in the world and is difficult to control as the larvae are internal feeders in the foliage and tubers. Entomopathogenic fungi that colonize plants as endophytes have lethal and sublethal pathological effects on insect pests. We show that Beauveria bassiana colonizes the aerial parts of potato plants endophytically after inoculation through soil drenching. Endophytic B. bassiana persisted in potato foliage for more than 50 days postinoculation. Bioassays indicated that foliage of B. bassiana-inoculated potato plants were pathogenic against larvae of P. operculella. Sublethal experiments indicated that B. bassiana negatively affected the growth, development, and reproduction of P. operculella. Development experiments showed that the weight of P. operculella pupae reared on B. bassianacolonized potato plants (4.25 mg) was significantly less than that of those reared on uninoculated control plants (8.89 mg). Compared with newly eclosed larvae fed on control plants, those fed on B. bassiana-inoculated plants had significantly lower survivorship, with only 17.8% developing to the adult stage. Oviposition of P. operculella females reared on B. bassiana endophytically colonized plants was significantly lower (35 eggs/female) than of those reared on uninoculated plants (115 eggs/female). This study demonstrates that endophytic B. bassiana can be a potential biological control agent for the control and management of P. operculella. Comparing pupal weights of P. operculella reared on potato plants inoculated with the B. bassiana strain GZGY-1-3 and on untreated control plants, pupae from the control plants were significantly heavier than those from treated plants.

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Leveraging the Ecology of Invertebrate Pathogens in Microbial Control

Cited by 9 publications

References 133 publications

Single Cell Encapsulation via Pickering Emulsion for Biopesticide Applications

Single Cell Encapsulation via Pickering Emulsion for Biopesticide Applications

Efficacy of entomopathogenic fungi, nematodes and spinetoram combinations for integrated management ofThrips tabaci

Establishment of Beauveria bassiana as a fungal endophyte in potato plants and its virulence against potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae)

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