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Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change.

ABSTRACT: Temperature has a large influence on insect abundances, thus under climate change, identifying major drivers affecting pest insect populations is critical to world food security and agricultural ecosystem health. Here, we conducted a meta-analysis with data obtained from 120 studies across China and Europe from 1970 to 2017 to reveal how climate and agricultural practices affect populations of wheat aphids. Here we showed that aphid loads on wheat had distinct patterns between these two regions, with a significant increase in China but a decrease in Europe over this time period. Although temperature increased over this period in both regions, we found no evidence showing climate warming affected aphid loads. Rather, differences in pesticide use, fertilization, land use, and natural enemies between China and Europe may be key factors accounting for differences in aphid pest populations. These long-term data suggest that agricultural practices impact wheat aphid loads more than climate warming.

SUBMITTER: Sun X

PROVIDER: S-EPMC9334390 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

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Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change.

Sun Xiao X Sun Yumei Y Ma Ling L Liu Zhen Z Wang Qiyun Q Wang Dingli D Zhang Chujun C Yu Hongwei H Xu Ming M Ding Jianqing J Siemann Evan E

Communications biology 20220728 1

Temperature has a large influence on insect abundances, thus under climate change, identifying major drivers affecting pest insect populations is critical to world food security and agricultural ecosystem health. Here, we conducted a meta-analysis with data obtained from 120 studies across China and Europe from 1970 to 2017 to reveal how climate and agricultural practices affect populations of wheat aphids. Here we showed that aphid loads on wheat had distinct patterns between these two regions, ...[more]

PMID: 35902771

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Project description:BackgroundClimate change poses a significant threat to agricultural production worldwide, with developing countries being particularly vulnerable to its negative impacts. Agriculture, which is a crucial factor in ensuring food security and livelihoods, is particularly vulnerable to changes in climate patterns, such as increased temperatures, drought, and extreme weather events. One approach to addressing these challenges is by promoting the adoption of climate-smart agriculture (CSA) practices among farmers. CSA combines traditional agricultural practices with innovative techniques and technologies to adapt to and mitigate the impacts of climate change. infrastructure. By adopting CSA practices, farmers can enhance their resilience to climate variability and improve their productivity.ObjectivesThis review examines the effectiveness of interventions promoting CSA to enhance farmers' knowledge of the benefits of CSA approaches, subsequent adoption of CSA, and disadoption of harmful agricultural practices in low- and middle-income countries (LMICs).Search methodsWe searched 39 academic and online databases, websites, and repositories and screened over 19,000 experimental and quasi-experimental publications to identify studies promoting CSA practices to women farmers. We conducted a citation tracking process on included studies and contacted experts to ensure a thorough search.Selection criteriaThe review focused on studies that included interventions promoting climate-smart agricultural approaches. Using EPPI Reviewer 4, two review authors independently screened the impact evaluation using a standardized screening tool.Data collection and analysisInformation about participant characteristics, intervention characteristics, control conditions, research design, sample size, bias risk, outcomes, and results were gathered. Data collection and quantitative analysis were conducted using standard Campbell Collaboration methods.Main resultsEight impact evaluations were found (two randomized controlled trials) evaluating the effects of CSA practices on farmer's knowledge gains of the benefits of CSA practices and subsequent adoption. Knowledge dissemination approaches such as Farmer Field Schools and weather and climate information services were found to positively impact farmers' knowledge and adoption of specific CSA practices. However, the evidence supporting this claim is uncertain as a high risk of bias was assessed for five of the eight included studies. However, we found no effects on the disadoption of harmful practices such as pesticide overuse.Authors' conclusionsThe evidence base for studies promoting climate-smart agricultural approaches (CSA) to farmers in LMICs is small, and there is a lack of studies reporting sex-disaggregated data and studies explicitly targeting women farmers. The review suggests that knowledge dissemination techniques are significantly effective in improving CSA knowledge and adoption, including integrated pest management techniques and their benefits, adoption of climate-resilient rice seed varieties (STRVs), and use of botanical pesticides by farmers. More and better confidence studies are needed to inform policy and programming, including those that look at a wider range of interventions, including changing norms, values, and institutional arrangements.

Dataset Information

Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change.

Publications

Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change.

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