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Book: The impact of global change on biological control

Crowder, David W.

(Biological control ; 75)

2014

Title variant	Special issue: The impact of global change on biological control
Author's details	guest ed.: David W. Crowder
Series title	Biological control ; 75
Collection
Language	English
Size	107 S. : Ill., graph. Darst.
Publisher	Elsevier
Publishing place	Amsterdam u.a.
Publishing country	Netherlands
Document type	Book
HBZ-ID	HT018350191
Database	Catalogue ZB MED Nutrition, Environment, Agriculture

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Shelf mark	Loan status	Location
Z 5854 (75)	available for loan (reading room)	Freihandmagazin (U1)

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Article ; Online: Expansion of organic agriculture.

Crowder, David W / Illan, Javier G

Nature food

2022 Volume 2, Issue 5, Page(s) 324–325

Language	English
Publishing date	2022-03-03
Publishing country	England
Document type	Journal Article
ISSN	2662-1355
ISSN (online)	2662-1355
DOI	10.1038/s43016-021-00288-8
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Integrating Community Ecology into Models of Vector-Borne Virus Transmission.

Lee, Benjamin W / Oeller, Liesl C / Crowder, David W

Plants (Basel, Switzerland)

2023 Volume 12, Issue 12

Abstract: Vector-borne plant viruses are a diverse and dynamic threat to agriculture with hundreds of economically damaging viruses and insect vector species. Mathematical models have greatly increased our understanding of how alterations of vector life history ... ...

Abstract	Vector-borne plant viruses are a diverse and dynamic threat to agriculture with hundreds of economically damaging viruses and insect vector species. Mathematical models have greatly increased our understanding of how alterations of vector life history and host-vector-pathogen interactions can affect virus transmission. However, insect vectors also interact with species such as predators and competitors in food webs, and these interactions affect vector population size and behaviors in ways that mediate virus transmission. Studies assessing how species' interactions affect vector-borne pathogen transmission are limited in both number and scale, hampering the development of models that appropriately capture community-level effects on virus prevalence. Here, we review vector traits and community factors that affect virus transmission, explore the existing models of vector-borne virus transmission and areas where the principles of community ecology could improve the models and management, and finally evaluate virus transmission in agricultural systems. We conclude that models have expanded our understanding of disease dynamics through simulations of transmission but are limited in their ability to reflect the complexity of ecological interactions in real systems. We also document a need for experiments in agroecosystems, where the high availability of historical and remote-sensing data could serve to validate and improve vector-borne virus transmission models.
Language	English
Publishing date	2023-06-15
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2704341-1
ISSN	2223-7747
ISSN	2223-7747
DOI	10.3390/plants12122335
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Vector-borne plant pathogens modify top-down and bottom-up effects on insect herbivores.

Clark, Robert E / Crowder, David W

Oecologia

2021 Volume 196, Issue 4, Page(s) 1085–1093

Abstract: Ecological theory predicts that host-plant traits affect herbivore population growth rates, which in turn modulates predator-prey interactions. However, while vector-borne plant pathogens often alter traits of both host plants and vectors, a few studies ... ...

Abstract	Ecological theory predicts that host-plant traits affect herbivore population growth rates, which in turn modulates predator-prey interactions. However, while vector-borne plant pathogens often alter traits of both host plants and vectors, a few studies have assessed how pathogens may act as interaction modifiers within tri-trophic food webs. By applying a food web motif framework, we assessed how a vector-borne plant pathogen (Pea-enation mosaic virus, PEMV) modified both bottom-up (plant-herbivore) and top-down (predator-prey) interactions. Specifically, we assessed trophic interactions with PEMV-infectious Acyrthosiphon pisum (pea aphid) vectors compared to non-infectious aphids in a factorial experiment that manipulated predator and plant communities. We show that PEMV altered bi-trophic relationships, whereby on certain plant species, PEMV reduced vector performance but also increased their susceptibility to predators. However, on other plant species, PEMV weakened top-down control or increased vector performance. Our results suggest that vector-borne plant pathogens are important interaction modifiers for plant-herbivore-predator dynamics: host-plant response to viruses can decrease herbivore abundance by reducing herbivore performance, but also increase herbivore abundance by weakening top-down control. Broadly speaking, trophic interactions that regulate herbivore outbreaks appear to be modified for herbivores actively transmitting viruses to host plants. Consequently, management and monitoring of outbreaking herbivores should consider the infection status of focal populations.
MeSH term(s)	Animals ; Aphids ; Food Chain ; Herbivory ; Insect Vectors ; Plants ; Predatory Behavior
Language	English
Publishing date	2021-07-17
Publishing country	Germany
Document type	Journal Article
ZDB-ID	123369-5
ISSN	1432-1939 ; 0029-8549
ISSN (online)	1432-1939
ISSN	0029-8549
DOI	10.1007/s00442-021-04987-8
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Factors affecting virus prevalence in honey bees in the Pacific-Northwest, USA.

Pfeiffer, Vera W / Crowder, David W

Journal of invertebrate pathology

2021 Volume 187, Page(s) 107703

Abstract: Global efforts to assess honey bee health show viruses are major stressors that undermine colony performance. Identifying factors that affect virus incidence, such as management practices and landscape context, could aid in slowing virus transmission. ... ...

Abstract	Global efforts to assess honey bee health show viruses are major stressors that undermine colony performance. Identifying factors that affect virus incidence, such as management practices and landscape context, could aid in slowing virus transmission. Here we surveyed viruses in honey bees from 86 sites in the Pacific Northwest, USA, and tested effects of regional bee density, movement associated with commercial pollination, julian date, and hive management on virus prevalence. We also explored patterns of virus co-occurrence and spatial autocorrelation to identify whether local transmission was a primary driver of pathogen distribution. Our surveys found widespread prevalence of Deformed wing virus (DWV), Sacbrood virus (SBV), and Black queen cell virus (BQCV). BQCV and SBV were most prolific in commercial apiaries, while Chronic bee paralysis virus (CPBV) was more common in hobbyist apiaries than commercial apiaries. DWV was most common in urban landscapes and was best predicted by mite prevalence and julian date, while the incidence of both SBV and BQCV were best predicted by regional apiary density. We did not find evidence of additional spatial autocorrelation for any viruses, although high co-occurrence suggests parallel transmission patterns. Our results support the importance of mite management in slowing virus spread and suggest that greater bee density increases transmission. Our study provides support that viruses are widespread in honey bees and connects known mechanisms of virus transmission to the distribution of pathogens observed across the Pacific Northwest.
MeSH term(s)	Animals ; Bees ; DNA Viruses ; Mites ; Pollination ; Prevalence ; RNA Viruses
Language	English
Publishing date	2021-12-11
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	390885-9
ISSN	1096-0805 ; 0022-2011
ISSN (online)	1096-0805
ISSN	0022-2011
DOI	10.1016/j.jip.2021.107703
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Article ; Online: Effects of Soil Rhizobia Abundance on Interactions between a Vector, Pathogen, and Legume Plant Host.

Malhotra, Pooja / Basu, Saumik / Lee, Benjamin W / Oeller, Liesl / Crowder, David W

Genes

2024 Volume 15, Issue 3

Abstract: Soil rhizobia promote nitrogen fixation in legume hosts, maximizing their tolerance to different biotic stressors, plant biomass, crop growth, and yield. While the presence of soil rhizobia is considered beneficial for plants, few studies have assessed ... ...

Abstract	Soil rhizobia promote nitrogen fixation in legume hosts, maximizing their tolerance to different biotic stressors, plant biomass, crop growth, and yield. While the presence of soil rhizobia is considered beneficial for plants, few studies have assessed whether variation in rhizobia abundance affects the tolerance of legumes to stressors. To address this, we assessed the effects of variable soil rhizobia inoculum concentrations on interactions between a legume host (
MeSH term(s)	Fabaceae/genetics ; Rhizobium/genetics ; Soil ; Pisum sativum ; Viruses
Chemical Substances	Soil
Language	English
Publishing date	2024-02-22
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527218-4
ISSN	2073-4425 ; 2073-4425
ISSN (online)	2073-4425
ISSN	2073-4425
DOI	10.3390/genes15030273
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A high-throughput plate method for nucleic acid extraction from beet leafhopper (Hemiptera: Cicadellidae) and potato psyllid (Hemiptera: Triozidae) for pathogen detection.

Gorman, Christopher J / Crowder, David W / Swisher Grimm, Kylie D

Journal of economic entomology

2023 Volume 116, Issue 5, Page(s) 1876–1884

Abstract: Plant pathogens that are transmitted by insect vectors cause considerable damage to crops when pests or pathogens are not detected early in the season and populations are not controlled. Knowledge of pathogen prevalence in insect pest populations can aid ...

Abstract	Plant pathogens that are transmitted by insect vectors cause considerable damage to crops when pests or pathogens are not detected early in the season and populations are not controlled. Knowledge of pathogen prevalence in insect pest populations can aid growers in their insect pest management decisions but requires the timely dissemination of results. This process requires that specimen capture, identification, nucleic acid extraction, and molecular detection of a pathogen(s) occur alongside a platform for sharing results. The potato psyllid (Bactericera cockerelli, Sulc; Hemiptera: Triozidae) and beet leafhopper (Circulifer tenellus, Baker; Hemiptera: Cicadellidae) transmit pathogens to potato and other vegetable or seed crops each season in the northwestern United States. While the potato psyllid has been tested for pathogen occurrence for the past decade, testing of the beet leafhopper is a new endeavor and substantially increases the specimen number that must be tested by our laboratories each season. To aid in the rapid processing of individual insect specimens, we optimized and validated a new high-throughput 96-well plate nucleic acid extraction method for use in place of a standard 1.5-ml single-tube extraction method. Processing efficiency, in terms of total specimens processed over a 2-day period, improved 2.5-fold, and the cost associated with processing a single sample was nearly cut in half with this newly developed plate nucleic acid extraction method. Overall, this method has proven to be an excellent tool for the rapid testing of large numbers of small, individual insect vectors to enable timely dissemination of data on pathogen prevalence to growers.
Language	English
Publishing date	2023-08-16
Publishing country	England
Document type	Journal Article
ZDB-ID	3031-4
ISSN	1938-291X ; 0022-0493
ISSN (online)	1938-291X
ISSN	0022-0493
DOI	10.1093/jee/toad153
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Article ; Online: Drought stress affects interactions between potato plants, psyllid vectors, and a bacterial pathogen.

Cohen, Abigail / Basu, Saumik / Crowder, David W

FEMS microbiology ecology

2022 Volume 99, Issue 1

Abstract: Transmission of insect-borne pathogens is mediated by interactions between insects and plants across variable environments. Water stress, for example, affects the physiology, defense, chemistry, and nutritional balance of plants in ways that alter their ... ...

Abstract	Transmission of insect-borne pathogens is mediated by interactions between insects and plants across variable environments. Water stress, for example, affects the physiology, defense, chemistry, and nutritional balance of plants in ways that alter their tolerance to herbivores and pathogens. However, few studies have explored interactions between water stress and insect-borne pathogens as well as the molecular mechanisms mediating these interactions. Here, we address these knowledge gaps by assessing effects of plant water stress on the transmission of a bacterial pathogen, Candidatus Liberibacter solanacearum (CLs), by the vector Bactericera cockerelli Šulc (potato psyllid). We hypothesized that plant water stress would promote pathogen transmission by inducing plant gene transcripts and phytohormones involved in defense. Our results showed water stress was associated with decreased CLs titer with two psyllid haplotypes. Our analysis of plant gene transcripts suggested water stress affected phytohormone pathways in ways that altered plant tolerance to the CLs pathogen. Our study shows that abiotic stressors like drought may mediate the spread of plant pathogens by altering plant signaling pathways in ways that affect pathogen transmission.
MeSH term(s)	Animals ; Hemiptera/microbiology ; Solanum tuberosum/microbiology ; Rhizobiaceae/genetics ; Droughts ; Dehydration ; Plant Diseases/microbiology
Language	English
Publishing date	2022-11-23
Publishing country	England
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	283722-5
ISSN	1574-6941 ; 0168-6496
ISSN (online)	1574-6941
ISSN	0168-6496
DOI	10.1093/femsec/fiac142
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Article: Factors affecting virus prevalence in honey bees in the Pacific-Northwest, USA

Pfeiffer, Vera W. / Crowder, David W.

Journal of invertebrate pathology. 2022 Jan., v. 187

2022

Abstract	Global efforts to assess honey bee health show viruses are major stressors that undermine colony performance. Identifying factors that affect virus incidence, such as management practices and landscape context, could aid in slowing virus transmission. Here we surveyed viruses in honey bees from 86 sites in the Pacific Northwest, USA, and tested effects of regional bee density, movement associated with commercial pollination, julian date, and hive management on virus prevalence. We also explored patterns of virus co-occurrence and spatial autocorrelation to identify whether local transmission was a primary driver of pathogen distribution. Our surveys found widespread prevalence of Deformed wing virus (DWV), Sacbrood virus (SBV), and Black queen cell virus (BQCV). BQCV and SBV were most prolific in commercial apiaries, while Chronic bee paralysis virus (CPBV) was more common in hobbyist apiaries than commercial apiaries. DWV was most common in urban landscapes and was best predicted by mite prevalence and julian date, while the incidence of both SBV and BQCV were best predicted by regional apiary density. We did not find evidence of additional spatial autocorrelation for any viruses, although high co-occurrence suggests parallel transmission patterns. Our results support the importance of mite management in slowing virus spread and suggest that greater bee density increases transmission. Our study provides support that viruses are widespread in honey bees and connects known mechanisms of virus transmission to the distribution of pathogens observed across the Pacific Northwest.
Keywords	Black queen cell virus ; Chronic bee paralysis virus ; Deformed wing virus ; Sacbrood virus ; apiaries ; autocorrelation ; honey ; honey bees ; landscapes ; mites ; pathogens ; pollination ; virus transmission ; viruses
Language	English
Dates of publication	2022-01
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	390885-9
ISSN	1096-0805 ; 0022-2011
ISSN (online)	1096-0805
ISSN	0022-2011
DOI	10.1016/j.jip.2021.107703
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Risk assessment for non‐crop hosts of pea enation mosaic virus and the aphid vector Acyrthosiphon pisum

Clark, Robert E. / Basu, Saumik / Eigenbrode, Sanford D. / Oeller, Liesl C. / Crowder, David W.

Agricultural and Forest Entomology. 2023 Aug., v. 25, no. 3 p.427-434

2023

Abstract: Viral insect‐borne plant pathogens have devastating impacts in agroecosystems. Vector‐borne pathogens are often transmitted by generalist insects that move between non‐crop and crop hosts. Insect vectors can have wide diet breadths, but it is often ... ...

Abstract	Viral insect‐borne plant pathogens have devastating impacts in agroecosystems. Vector‐borne pathogens are often transmitted by generalist insects that move between non‐crop and crop hosts. Insect vectors can have wide diet breadths, but it is often unknown which hosts serve as pathogen reservoirs and which non‐crop host harbours the highest density of vectors. In the Pacific Northwest USA, the pea aphid (Acyrthosiphon pisum) is a key virus vector in pulse crops. Despite pea aphid having a large number of potential non‐crop plant hosts occuring in the region, no reservoir has yet been identified for the economically‐costly pathogen Pea Enation Mosaic Virus (PEMV). We addressed these issues by linking field surveys of an aphid vector and plant virus with statistical models to develop risk assessments for common non‐crop legumes; in 2018, we completed a 65‐site survey where aphids were surveyed in weedy legumes within and outside dry pea fields. We quantified the abundance of pea aphids on 17 hosts, and plant tissue was tested for PEMV. Relatively high densities of A. pisum were found in habitats dominated by hairy vetch (Vicia villosa), which was the only legume other than cultivated dry pea where PEMV was detected. Our results indicate that V. villosa is a key alternative host for PEMV, and that pest management practices in this region should consider the distribution and abundance of this weedy host in viral disease mitigation efforts for pulses.
Keywords	Acyrthosiphon pisum ; Vicia villosa ; agroecosystems ; alternative hosts ; diet ; entomology ; forests ; insects ; pathogens ; peas ; pest management ; plant tissues ; risk ; risk assessment ; surveys ; viruses ; Northwestern United States
Language	English
Dates of publication	2023-08
Size	p. 427-434.
Publishing place	Blackwell Publishing Ltd
Document type	Article ; Online
Note	JOURNAL ARTICLE
ZDB-ID	1444210-3
ISSN	1461-9563 ; 1461-9555
ISSN (online)	1461-9563
ISSN	1461-9555
DOI	10.1111/afe.12564
Database	NAL-Catalogue (AGRICOLA)

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