What does global warming mean for stored-grain protection? Options for Prostephanus truncatus (Horn) control at increased temperatures

Singano, Charles; Mvumi, Brighton M.; Stathers, T.; Machekano, Honest; Nyamukondiwa, Casper

doi:10.1016/j.jspr.2019.101532

Cited by 17 publications

(10 citation statements)

References 48 publications

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“…Its resilience in wild environments and potential to be transported across the world in grain and other host products' shipment has been a fascinating subject to many workers (reviewed in Hodges, 1986; Boxall, 2002; Nansen & Meikle, 2002; Nang'ayo et al ., 2002; Arthur et al ., 2019; Machekano et al ., 2020; Stathers et al ., 2020). Previous studies have investigated its basal thermal tolerance (Machekano et al ., 2020; Singano et al ., 2020) and developed models to forecast its spatio‐temporal distribution (Arthur et al ., 2019; Nyabako et al ., 2020). However, the physiological mechanisms behind its invasion success remain underexplored.…”

Section: Introductionmentioning

confidence: 99%

Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success?

Mutamiswa

Machekano

Singano³

et al. 2021

Physiol. Entomol.

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The larger grain borer, Prostephanus truncatus (Horn) is an invasive insect pest species of global economic concern. It however remains unknown how P. truncatus succeeds under increasing temperatures and desiccation effects associated with projected climate change. Here, we investigated the effects of desiccation and high‐temperature stress on physiological fitness of P. truncatus larvae and adults. Specifically, we measured critical thermal maxima, heat knockdown time and water loss rates following heat and desiccation acclimation. Results showed beneficial heat acclimation effects on heat tolerance (critical thermal maxima and heat knockdown time). Similarly, desiccation acclimation significantly improved both heat tolerance traits, indicating cross‐tolerance effects, not for heat knockdown time in larvae. In all cases, adults exhibited more improved heat tolerance than larvae. Conversely, heat acclimation increased water loss rates, and more so in larvae than adults. Improved heat tolerance plus abiotic stress cross‐tolerance of P. truncatus may explain its enhanced physiological and ecological fitness in dry tropical and changing climate environments. These results are important in explaining the role of physiology in insect invasions and may inform pest management and forecasting.

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Section: Introductionmentioning

confidence: 99%

Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success?

Mutamiswa

Machekano

Singano³

et al. 2021

Physiol. Entomol.

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“…We showed that its exploitation in combination with a biological control agent is feasible for a prolonged storage period, an issue that triggers its application as grain protectant at low doses. The climate crisis and the global warming (Sognnaes et al 2021;Yang et al 2022;NASA 2022) favor the dispersal of noxious insect species including stored-product insects (Athanassiou et al 2019;Papanikolaou et al 2019;Kim et al 2020;Singano et al 2020). Therefore, temperature becomes an important component of studies that evaluate the performance of insecticides, alone or in combination with other agents, for the management of harmful insects occurring in storage facilities.…”

Section: Discussionmentioning

confidence: 99%

Combinations of Beauveria bassiana and spinetoram for the management of four important stored-product pests: laboratory and field trials

Wakil

Kavallieratos

Nika

et al. 2022

Environ Sci Pollut Res

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The current study examines the efficacy of the semi-synthetic insecticide spinetoram and entomopathogenic fungi Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitaceae) as wheat protectants against the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae), the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), the granary weevil, Sitophilus granarius (L.) (Coleoptera: Curculionidae), and the khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), under laboratory and field trials. One dose of B. bassiana, i.e., 1 × 107 conidia/kg wheat, two doses of spinetoram, i.e., spine1: 0.05 ppm (mg/kg wheat), spine2: 0.1 ppm, and their combinations (Bb + spine1, Bb + spine2) were evaluated at 20, 25, and 30 °C. All treatments provided significantly higher mortality at 30 °C compared with the other two temperatures. Maximum mortality levels were observed in the treatments where B. bassiana was combined with the higher dose of spinetoram (0.1 ppm). All treatments reduced progeny production in comparison with the control groups. Maximum progeny reduction was observed at 30 °C, on wheat treated with the Bb + spine2 combination. The combination Bb + spine2 also provided elevated mortality rates in both laboratory and field persistence trials, but at 180 days caused moderate mortality to all tested insect species. Concerning progeny, at laboratory persistence trials, the combination Bb + spine2 exhibited the lowest offspring emergence to all tested species compared to the other treatments and control. Overall, our study showed that R. dominica was the most susceptible species followed by S. granarius, T. castaneum, and T. granarium. Our findings revealed that the combination of B. bassiana and spinetoram may be a useful tool for efficient and advanced integrated pest management strategies for long storage periods under multiple temperatures.

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“…In addition, higher temperatures from climate change may make sanitation even more critical for the proper functioning of a variety of other integrated pest tactics at food facilities (e.g., reviewed in Morrison et al, 2019). Research on hermetic bags showed that there was little effect of elevated temperature on the success of suppressing insect population growth in maize grain up to 38°C (Singano et al, 2020). Similar investigations with hermetic packaging showed increased mortality in the same treatments up to 50°C (PrazǐćGolicé t al., 2016).…”

Section: Changing Integrated Pest Management Efficacy After Harvest I...mentioning

confidence: 98%

“…Similar investigations with hermetic packaging showed increased mortality in the same treatments up to 50°C (PrazǐćGolicé t al., 2016). Interestingly, higher temperatures are often recorded within the hermetic bags compared to the outside temperatures, which could also encourage insect mortality (Njoroge et al, 2014;Prasantha et al, 2014;Singano et al, 2020). While it is likely climate change has little impact on the efficacy of extreme temperatures, it is possible that climate change will make it more difficult to reach a specific temperature and/or hold the temperature for a given period.…”

Section: Changing Integrated Pest Management Efficacy After Harvest I...mentioning

confidence: 99%

Pest Management in the Postharvest Agricultural Supply Chain Under Climate Change

Gerken

Morrison

2022

Front. Agron.

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Climate change is a danger to the agricultural system and will impact the availability of food to feed the world. While much attention has focused on the effects of climate change on pest management prior to harvest, much less attention and time has been devoted to determining the effects of climate change on pest management in the postharvest supply chain from farm to fork. Climate change may percolate to pest management at a macro level through compositional changes in which species attack commodities through distributional changes or what commodities are grown in a region (and thus processed in that area). However, climate change may also result in altered microclimates at food facilities, which can be tied to increased generation times, elevated damage and contamination potential, greater abundance of species, and greater need for external inputs. A variety of integrated pest management (IPM) strategies may help increase the resiliency and adaptation of management to climate change. Tactics susceptible to warming temperature changes in climate showing decreased efficacy include semiochemical-based, behaviorally-based tactics, a subset of insecticides (e.g., pyrethrins and pyrethroids), and those that rely on low temperature (e.g., grain aeration, grain chilling). Tactics at food facilities showing resilience to warming temperature changes in climate include packaging, other groups of insecticides, and likely sanitation. Data gaps include predicting changing distributions for stored product insects under climate change, translating macro climate changes into microclimate changes at food facilities, and rigorously investigating how IPM tactic efficacy varies under changing climate. Increased scrutiny of how climate change will affect pest management in the postharvest supply chain will deliver improved outcomes for the entire agricultural system.

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What does global warming mean for stored-grain protection? Options for Prostephanus truncatus (Horn) control at increased temperatures

Cited by 17 publications

References 48 publications

Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success?

Desiccation and temperature resistance of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae): pedestals for invasion success?

Combinations of Beauveria bassiana and spinetoram for the management of four important stored-product pests: laboratory and field trials

Pest Management in the Postharvest Agricultural Supply Chain Under Climate Change

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