Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae)
Diet quality influences arthropod performance under changing environments. However, little is known about how host plant species may influence the responses of polyphagous insects to climate stressors despite their exploitation of different plant species within and across seasons. Against this backg...
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2022
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| Online Access: | https://doi.org/10.1007/s11829-020-09762-9 http://hdl.handle.net/11408/4945 |
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| author | Mutamiswa, Reyard Machekano, Honest Nyamukondiwa, Casper Chidawanyika, Frank |
| author_facet | Mutamiswa, Reyard Machekano, Honest Nyamukondiwa, Casper Chidawanyika, Frank |
| author_sort | Mutamiswa, Reyard |
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| description | Diet quality influences arthropod performance under changing environments. However, little is known about how host plant species may influence the responses of polyphagous insects to climate stressors despite their exploitation of different plant species within and across seasons. Against this background, we examined the effects of host plant species (Zea mays L. and Sorghum bicolor L. Moench) on the thermal tolerance of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) measured as lower and upper thermal activity limits, chill coma recovery time and heat knockdown time. Experiments were conducted on field-collected larvae and laboratory-reared F1 larval offspring from each of the two host species. Our results showed significant host plant effects on both cold and heat tolerance. Insects from sweet sorghum showed higher thermal resilience (cold and heat) relative to those from maize as indicated by their low lower thermal activity limits (0.73 and 0.02 °C magnitude, respectively) and high upper thermal activity limits (0.5 and 0.28 °C magnitude, respectively). Both field and F1 larval populations from sweet sorghum recovered faster from chill coma and also took longer to be knocked down by acute heat stress, further affirming their superior thermal tolerance to those that fed on maize. These results therefore indicate that host plant species may potentially mediate thermal fitness of C. partellus. Despite wide adoption of sweet sorghum as a climate resilient crop owing to its drought tolerance and perennial nature, our findings suggest this may come at a cost of enhanced C. partellus performance and pest pressure under changing temperature environments. |
| format | Article |
| id | ir-11408-4945 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | Springer |
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| spelling | ir-11408-49452022-07-07T13:01:48Z Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) Mutamiswa, Reyard Machekano, Honest Nyamukondiwa, Casper Chidawanyika, Frank Climate change Environmental stress resistance Invasive pest Plant–insect interactions Stemborers Diet quality influences arthropod performance under changing environments. However, little is known about how host plant species may influence the responses of polyphagous insects to climate stressors despite their exploitation of different plant species within and across seasons. Against this background, we examined the effects of host plant species (Zea mays L. and Sorghum bicolor L. Moench) on the thermal tolerance of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) measured as lower and upper thermal activity limits, chill coma recovery time and heat knockdown time. Experiments were conducted on field-collected larvae and laboratory-reared F1 larval offspring from each of the two host species. Our results showed significant host plant effects on both cold and heat tolerance. Insects from sweet sorghum showed higher thermal resilience (cold and heat) relative to those from maize as indicated by their low lower thermal activity limits (0.73 and 0.02 °C magnitude, respectively) and high upper thermal activity limits (0.5 and 0.28 °C magnitude, respectively). Both field and F1 larval populations from sweet sorghum recovered faster from chill coma and also took longer to be knocked down by acute heat stress, further affirming their superior thermal tolerance to those that fed on maize. These results therefore indicate that host plant species may potentially mediate thermal fitness of C. partellus. Despite wide adoption of sweet sorghum as a climate resilient crop owing to its drought tolerance and perennial nature, our findings suggest this may come at a cost of enhanced C. partellus performance and pest pressure under changing temperature environments. 2022-07-07T13:01:48Z 2022-07-07T13:01:48Z 2020 Article 1872-8855 1872-8847 https://doi.org/10.1007/s11829-020-09762-9 http://hdl.handle.net/11408/4945 en Arthropod-Plant Interactions;14, pages 463–471 open Springer |
| spellingShingle | Climate change Environmental stress resistance Invasive pest Plant–insect interactions Stemborers Mutamiswa, Reyard Machekano, Honest Nyamukondiwa, Casper Chidawanyika, Frank Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title | Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title_full | Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title_fullStr | Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title_full_unstemmed | Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title_short | Host plant-related responses on the thermal fitness of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) |
| title_sort | host plant-related responses on the thermal fitness of chilo partellus (swinhoe) (lepidoptera: crambidae) |
| topic | Climate change Environmental stress resistance Invasive pest Plant–insect interactions Stemborers |
| url | https://doi.org/10.1007/s11829-020-09762-9 http://hdl.handle.net/11408/4945 |
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