Economic Value of Biological Control in Integrated Pest Management of Managed Plant Systems

Naranjo, Steven E.; Ellsworth, Peter C.; Frisvold, George B.

doi:10.1146/annurev-ento-010814-021005

Cited by 293 publications

(212 citation statements)

References 126 publications

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“…For comparison, the mean effect of organic farming (versus conventional farming) on predatory insect abundance was estimated to be d = 0.49 (Bengtsson, Ahnström & Weibull, 2005). Both effect sizes suggest that synthetic insecticides can undermine natural-enemy populations, but the consequences of these reductions for ecosystem services are hard to predict given a lack of research relating predator abundance to biological control function and its economic value (Naranjo, Ellsworth & Frisvold, 2015). The one study in our dataset that explicitly related predator abundance to crop yield was our previous study in a no-till soybean system (Douglas, Rohr & Tooker, 2015).…”

Section: Discussionmentioning

confidence: 99%

Meta-analysis reveals that seed-applied neonicotinoids and pyrethroids have similar negative effects on abundance of arthropod natural enemies

Douglas

Tooker

2016

PeerJ

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BackgroundSeed-applied neonicotinoids are widely used in agriculture, yet their effects on non-target species remain incompletely understood. One important group of non-target species is arthropod natural enemies (predators and parasitoids), which contribute considerably to suppression of crop pests. We hypothesized that seed-applied neonicotinoids reduce natural-enemy abundance, but not as strongly as alternative insecticide options such as soil- and foliar-applied pyrethroids. Furthermore we hypothesized that seed-applied neonicotinoids affect natural enemies through a combination of toxin exposure and prey scarcity.MethodsTo test our hypotheses, we compiled datasets comprising observations from randomized field studies in North America and Europe that compared natural-enemy abundance in plots that were planted with seed-applied neonicotinoids to control plots that were either (1) managed without insecticides (20 studies, 56 site-years, 607 observations) or (2) managed with pyrethroid insecticides (eight studies, 15 site-years, 384 observations). Using the effect size Hedge’s d as the response variable, we used meta-regression to estimate the overall effect of seed-applied neonicotinoids on natural-enemy abundance and to test the influence of potential moderating factors.ResultsSeed-applied neonicotinoids reduced the abundance of arthropod natural enemies compared to untreated controls (d = −0.30 ± 0.10 [95% confidence interval]), and as predicted under toxin exposure this effect was stronger for insect than for non-insect taxa (QM = 8.70, df = 1, P = 0.003). Moreover, seed-applied neonicotinoids affected the abundance of arthropod natural enemies similarly to soil- or foliar-applied pyrethroids (d = 0.16 ± 0.42 or −0.02 ± 0.12; with or without one outlying study). Effect sizes were surprisingly consistent across both datasets (I2 = 2.7% for no-insecticide controls; I2 = 0% for pyrethroid controls), suggesting little moderating influence of crop species, neonicotinoid active ingredients, or methodological choices.DiscussionOur meta-analysis of nearly 1,000 observations from North American and European field studies revealed that seed-applied neonicotinoids reduced the abundance of arthropod natural enemies similarly to broadcast applications of pyrethroid insecticides. These findings suggest that substituting pyrethroids for seed-applied neonicotinoids, or vice versa, will have little net affect on natural enemy abundance. Consistent with previous lab work, our results also suggest that seed-applied neonicotinoids are less toxic to spiders and mites, which can contribute substantially to biological control in many agricultural systems. Finally, our ability to interpret the negative effect of neonicotinoids on natural enemies is constrained by difficulty relating natural-enemy abundance to biological control function; this is an important area for future study.

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Section: Discussionmentioning

confidence: 99%

Meta-analysis reveals that seed-applied neonicotinoids and pyrethroids have similar negative effects on abundance of arthropod natural enemies

Douglas

Tooker

2016

PeerJ

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“…has resulted in effective control of multiple endemic and exotic pests, and has provided massive (e.g., Naranjo et al, 2015). In light of the above, we conduct a critical assessment of the extent to 137 which social science perspectives have been incorporated into biological control research over 138 the past 25 years.…”

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confidence: 99%

Maximizing farm-level uptake and diffusion of biological control innovations in today’s digital era

Wyckhuys

Bentley²,

Lie

et al. 2017

BioControl

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The International Center for Tropical Agriculture (CIAT) believes that open access contributes to its mission of reducing hunger and poverty, and improving human nutrition in the tropics through research aimed at increasing the eco-efficiency of agriculture.CIAT is committed to creating and sharing knowledge and information openly and globally. We do this through collaborative research as well as through the open sharing of our data, tools, and publications. Citation:Wyckhuys, Kris A.; Bentley, Jeff W.; Lie, Rico; Nghiem,Le Thi Phuong; Fredrix, Marjon. 2017. Maximizing farm-level uptake and diffusion of biological control innovations in today's digital era. BioControl .63 (1) disregarded. In this study, we conduct a retrospective analysis of the extent to which social 39 science facets have been incorporated into biological control research over the past 25 years. 40Next, we critically examine various biological control forms, concepts and technologies using a 41'diffusion of innovations' framework, and identify elements that hamper their diffusion and 42 farm-level uptake. Lastly, we introduce effective observation-based learning strategies, such as African subsistence farmers to control key pests on sorghum and maize (Cook et al., 2007). 128The biggest stumbling block for conservation biological control is that 'from the viewpoint of on insect biological control was consolidated by using the search terms (("biological control" OR 149 "natural enem*") AND ("insect*" OR "arthropod")). These search terms were defined by the 150 authors. Within this set, we ran the following additional queries: 151  (("farmer" OR "stakeholder" OR "public") NOT "public health")), for studies that make 152 reference to end-users; 153 8  (("gender" OR "women" OR "woman")), for studies that make reference to gender-154 aspects (solely of target adopters, and not insects); 155  (("intergeneration*" OR "youth" OR ("young" AND "age") OR "children")) , for studies 156 that take into account age of target adopters, or include youngsters; 157  (("knowledge" OR "innovation" OR "information") AND ("diffusion" OR "transfer" OR 158"dissemination" OR "training")), for manuscripts that allude to knowledge transfer; parasitism by minute hymenopterans or the action of entomo-pathogens, are difficult to observe. 256But, rather surprisingly, farmers were also entirely unaware of insect predation by social wasps; 257 conspicuous and active caterpillar-hunters that are omnipresent in local fields. Wasps (e.g., 258Polybia spp.; Hymenoptera: Vespidae) typically nest under the porch roof of rural homes, and fly Farmer knowledge of pests and natural enemies can be seen as a matrix that compares the 295 "culturally important" with the "ease (or difficulty) of observation" (Bentley, 1992 and explain the best that modern science has to offer, drawing upon logic and analogies (e.g. 325"insects mate, just like other animals") and using animations, diagrams, and photos. 326There may be no local knowledge at all for the culturally unimportant and dif...

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“…To date relatively few assessments of economic benefits of biological control have been carried out despite the fact that it is probably unsurpassed in providing returns on investment in IPM (Naranjo et al 2015). These authors, using data from BIOCAT (Greathead and Greathead 1992) argued that historically the benefits that have accrued from the classical biological control programmes that have succeeded are likely to have more than compensated for those that failed.…”

Section: Cost-effectiveness Of Biocontrolmentioning

confidence: 99%

The status of biological control and recommendations for improving uptake for the future

Barratt

Moran

Bigler³

et al. 2017

BioControl

268

142

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Classical and augmentative biological control of insect pests and weeds has enjoyed a long history of successes. However, biocontrol practices have not been as universally accepted or optimally utilised as they could be. An International Organisation for Biological Control (IOBC) initiative brought together practitioners and researchers from widely diverse fields to identify the main limitations to biocontrol uptake and to recommend means of mitigation. Limitations to uptake included: risk averse and unwieldy regulatory processes; increasingly bureaucratic barriers to access to biocontrol agents; insufficient engagement and communication with the public, stakeholders, growers and politicians of the considerable economic benefits of biocontrol; and fragmentation of biocontrol sub-disciplines. In this contribution we summarise a range of recommendations for the future that emphasise the need for improved communication of economic, environmental and social successes and benefits of biological control for insect pests, weeds and plant diseases, targeting political, regulatory, grower/land manager and other stakeholder interests. Political initiatives in some countries which augur well for biocontrol in the future are discussed.

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Economic Value of Biological Control in Integrated Pest Management of Managed Plant Systems

Cited by 293 publications

References 126 publications

Meta-analysis reveals that seed-applied neonicotinoids and pyrethroids have similar negative effects on abundance of arthropod natural enemies

Meta-analysis reveals that seed-applied neonicotinoids and pyrethroids have similar negative effects on abundance of arthropod natural enemies

Maximizing farm-level uptake and diffusion of biological control innovations in today’s digital era

The status of biological control and recommendations for improving uptake for the future

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