Climate change, transgenic corn adoption and field-evolved resistance in corn earworm

Venugopal, P. Dilip; Dively, Galen P.

doi:10.1098/rsos.170210

Cited by 17 publications

(14 citation statements)

References 64 publications

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“…Recommended insecticide treatment schedules for O. nubilalis control on these crops are made primarily based on blacklight trap counts of adult moths (18,(23)(24)(25). Existing reports identify the decline of O. nubilalis and H. zea populations in the Mid-Atlantic region in relation to widespread Bt corn adoption (26)(27)(28). This may benefit vegetable growers, as field corn is the primary source of O. nubilalis that invade Mid-Atlantic vegetable crops.…”

Section: Significancementioning

confidence: 99%

Regional pest suppression associated with widespread Bt maize adoption benefits vegetable growers

Dively

Venugopal

Bean

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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185

137

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Transgenic crops containing the bacterium (Bt) genes reduce pests and insecticide usage, promote biocontrol services, and economically benefit growers. Area-wide Bt adoption suppresses pests regionally, with declines expanding beyond the planted Bt crops into other non-Bt crop fields. However, the offsite benefits to growers of other crops from such regional suppression remain uncertain. With data spanning 1976-2016, we demonstrate that vegetable growers benefit via decreased crop damage and insecticide applications in relation to pest suppression in the Mid-Atlantic United States. We provide evidence for the regional suppression of (Hübner), European corn borer, and (Boddie), corn earworm, populations in association with widespread Bt maize adoption (1996-2016) and decreased economic levels for injury in vegetable crops [peppers ( L.), green beans ( L.), and sweet corn ( L., convar. )] compared with the pre-Bt period (1976-1995). Moth populations of both species significantly declined in association with widespread Bt maize (field corn) adoption, even as increased temperatures buffered the population reduction. We show marked decreases in the number of recommended insecticidal applications, insecticides applied, and damage in vegetable crops in association with widespread Bt maize adoption. These offsite benefits to vegetable growers in the agricultural landscape have not been previously documented, and the positive impacts identified here expand on the reported ecological effects of Bt adoption. Our results also underscore the need to account for offsite economic benefits of pest suppression, in addition to the direct economic benefits of Bt crops.

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Section: Significancementioning

confidence: 99%

Regional pest suppression associated with widespread Bt maize adoption benefits vegetable growers

Dively

Venugopal

Bean

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

185

137

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“…In contrast, resources such as prey insects are remaining abundant later into the year (Diffenbaugh et al. ; Venugopal & Dively, ), enabling the possibility of delayed autumn migration. Our results provide no clear trend in autumn departure decisions, and show large yearly variability (Figure c, blue).…”

Section: Discussionmentioning

confidence: 99%

“…These same changes are forecasted to promote seasonal and geographical expansion of migratory agricultural pest insects, while strengthening their resistance to pesticides and transgenic crops (Diffenbaugh et al. ; Venugopal & Dively, ). Bats have the capacity to provide natural pest management, directly increasing profitability of both natural and genetically engineered field crops (Federico et al.…”

Section: Discussionmentioning

confidence: 99%

“…Under global warming scenarios, increasing summer daytime temperatures and drought stress will continue to place pressure on bat populations (Adams, 2010;Frick et al, 2012;Jones, Jacobs, Kunz, Willig, & Racey, 2009;Sherwin et al, 2012). These same changes are forecasted to promote seasonal and geographical expansion of migratory agricultural pest insects, while strengthening their resistance to pesticides and transgenic crops (Diffenbaugh et al 2008;Venugopal & Dively, 2017). Bats have the capacity to provide natural pest management, directly increasing profitability of both natural and genetically engineered field crops (Federico et al 2008).…”

Section: Discussionmentioning

confidence: 99%

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Ongoing changes in migration phenology and winter residency at Bracken Bat Cave

Stepanian

Wainwright

2018

Global Change Biology

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Bats play an important role in agroecology and are effective bioindicators of environmental conditions, but little is known about their fundamental migration ecology, much less how these systems are responding to global change. Some of the world's largest bat populations occur during the summer in the south-central United States, when millions of pregnant females migrate from lower latitudes to give birth in communal maternity colonies. Despite a relatively large volume of research into these colonies, many fundamental questions regarding their abundance-including their intra- and interseasonal variability-remain unanswered, and even estimating the size of individual populations has been a long-running challenge. Overall, monitoring these bat populations at high temporal resolution (e.g., nightly) and across long time spans (e.g., decades) has been impossible. Here, we show 22 continuous years of nightly population counts at Bracken Cave, a large bat colony in south-central Texas, enabling the first climate-scale phenological analysis. Using quantitative radar monitoring, we found that spring migration and the summer reproductive cycle have advanced by approximately 2 weeks over the study period. Furthermore, we quantify the ongoing growth of a newly-established overwintering population that indicates a system-wide response to changing environmental conditions. Our observations reveal behavioral plasticity in bats' ability to adapt to changing resource availability, and provide the first long-term quantification of their response to a changing climate. As aerial insectivores, these changes in bat phenology and propensity for overwintering indicate probable shifts in prey availability, with clear implications for pest management across wider regional agrisystems.

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“…Attempts to incorporate disease and insect effects into model projections presents challenges because responses by individual pests, weeds, and diseases can arise from direct effects on agent physiology, behavior, and phenology that influence geographic range, reproduction and mortality impacts (Juroszek and Von Tiedemann, 2015). Drivers include seasonal warming and increasing atmospheric [CO 2 ] on pest fecundity and population dynamics (Dyer et al, 2013), shifts in geographic or elevational ranges of pests (Bebber et al, 2013;Bebber, 2015), expression of plant resistance factors affecting pests (Tyler and Hatchett, 1983;Currie et al, 2014), acceleration of pest resistance to pesticides and Bt (Bacillus thuringiensis) genetically engineered crops (Venugopal and Dively, 2017), changes to feeding behavior, phenology, and voltinism (Ziter et al, 2012), and alterations to trophic interactions and biological control mechanisms (Gillespie et al, 2013;Romo and Tylianakis, 2013;Eigenbrode et al, 2015).…”

Section: Data Management To Enable Regional and Global Effortsmentioning

confidence: 99%

Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement

Eigenbrode

Binns²,

Huggins

2018

Front. Ecol. Evol.

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Semi-arid cereal systems face challenges worldwide that are driven by ongoing and projected climate change. These challenges include ensuring cropping system resilience and productivity under changing water and temperature regimes while reversing soil degradation, reducing crop susceptibility to pests, pathogens and weed competition, and exploiting genetic resources to develop cultivars with resilience to climate stresses and improved compatibility with cropping system innovations. Meeting these interdependent challenges requires transdisciplinary efforts that integrate knowledge across many scientific domains. The USDA-NIFA-funded coordinated agricultural project, "Regional Approaches to Climate Change for Pacific Northwest Agriculture" (REACCH), employed this transdisciplinary approach to address climate change and sustainability challenges for rain-fed cereal-based systems in the semi-arid intermountain Pacific Northwest. To engage with and contribute to similar efforts globally, REACCH sponsored a workshop "Transitioning Cereal Systems to Adapt to Climate Change" (TCSACC) in November 2015. Participants from 17 countries and five continents with expertise in agronomy, crop physiology, crop modeling, crop protection, breeding and genetics, sociology and economics shared their perspectives, successes, and challenges to achieving transdisciplinary research integration for semi-arid cereal systems under changing climates. Conference goals were to: (1) strengthen the global network of researchers addressing climate change effects on semi-arid cereal-based systems, (2) share the approaches to achieving transdisciplinary collaboration to advance climate change resilience in cereal systems, and (3) identify the elements of a collaborative research agenda that are needed to advance global food security in the twenty-first century. This paper distills the conference themes and summarizes the calls to action that were discussed: Establish coordinated, large scale, transdisciplinary efforts; Consider Genetic × Environment × Management × Social system (G × E × M × S) interactions; Integrate social, economic, and biophysical science, and Eigenbrode et al.Dryland Cereal Production and Climate Change engineering; Improve integration among knowledge communities; Consider global context of production systems; Develop more inclusive cropping system models; Enable comprehensive data management and data sharing; Include landscape and ecosystem services perspectives; Establish and support existing global collaboration networks.

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Climate change, transgenic corn adoption and field-evolved resistance in corn earworm

Cited by 17 publications

References 64 publications

Regional pest suppression associated with widespread Bt maize adoption benefits vegetable growers

Regional pest suppression associated with widespread Bt maize adoption benefits vegetable growers

Ongoing changes in migration phenology and winter residency at Bracken Bat Cave

Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement

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