Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride
The effects of temperature on conidial germination and susceptibility of adults of the desert locust, Schistocer cagregaria, to four isolates of Meta rhizium flovoviride were determined. In addition, the eff ects of inoculation method (topical or spray), spore carrie r (oil or wat er) and ambient re...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Informa UK Limited
1997
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| Acceso en línea: | https://hdl.handle.net/10568/98606 |
| _version_ | 1855529110701342720 |
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| author | Fargues, J. Ouédraogo, A. Goettel, M.S. Lomer, C.J. |
| author_browse | Fargues, J. Goettel, M.S. Lomer, C.J. Ouédraogo, A. |
| author_facet | Fargues, J. Ouédraogo, A. Goettel, M.S. Lomer, C.J. |
| author_sort | Fargues, J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The effects of temperature on conidial germination and susceptibility of adults of the desert locust, Schistocer cagregaria, to four isolates of Meta rhizium flovoviride were determined. In addition, the eff ects of inoculation method (topical or spray), spore carrie r (oil or wat er) and ambient relative humidity (R H ) on susceptibility of the locust to the most thermotolerant isolate (M f324) were investigated. There were differences among the isolates in the effects of temperature on germination of conidia after a 24 -h incubation period. Over 90% of conidia of all isolates germinated after 24 h at 30oC. In contrast, at 40oC, none of the isolates germinated for up to 72 h. However, there were differences in germination between the isolates at 35oC. Locust mortality and disease progression were significantly affected by temperature. At both 25 and 30oC, all isolates induced 98-100% mortality within 8 days; however, there were differences between isolates at 35oC. None of the isolates caused significant mortality at 40oC. Humidity and inoculation method had no influence on levels of mortality in fungus treated locusts. In contrast, carrier type signicantly affected cumulative mortality. Topical oil treatment resulted in higher overall mycosis than the three other treatments. Control mortality on the other hand was strongly affected by inoculation method and to a lesser ex tent by humidity and carrier. In these conditions, application of oil by spray was generally toxic at all humidities whereas topical application of water was most toxic at near saturation. The results of these laboratory studies demonstrate the importance of strain selection, formulation and application method in the development of a microbial control agent against the desert locust .Low R H should not impede use of this fungus under dry conditions. |
| format | Journal Article |
| id | CGSpace98606 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1997 |
| publishDateRange | 1997 |
| publishDateSort | 1997 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace986062025-12-08T09:54:28Z Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride Fargues, J. Ouédraogo, A. Goettel, M.S. Lomer, C.J. metarhizium anisopliae entomopathogenic fungi microbial culture temperature humidity spore germination locusts The effects of temperature on conidial germination and susceptibility of adults of the desert locust, Schistocer cagregaria, to four isolates of Meta rhizium flovoviride were determined. In addition, the eff ects of inoculation method (topical or spray), spore carrie r (oil or wat er) and ambient relative humidity (R H ) on susceptibility of the locust to the most thermotolerant isolate (M f324) were investigated. There were differences among the isolates in the effects of temperature on germination of conidia after a 24 -h incubation period. Over 90% of conidia of all isolates germinated after 24 h at 30oC. In contrast, at 40oC, none of the isolates germinated for up to 72 h. However, there were differences in germination between the isolates at 35oC. Locust mortality and disease progression were significantly affected by temperature. At both 25 and 30oC, all isolates induced 98-100% mortality within 8 days; however, there were differences between isolates at 35oC. None of the isolates caused significant mortality at 40oC. Humidity and inoculation method had no influence on levels of mortality in fungus treated locusts. In contrast, carrier type signicantly affected cumulative mortality. Topical oil treatment resulted in higher overall mycosis than the three other treatments. Control mortality on the other hand was strongly affected by inoculation method and to a lesser ex tent by humidity and carrier. In these conditions, application of oil by spray was generally toxic at all humidities whereas topical application of water was most toxic at near saturation. The results of these laboratory studies demonstrate the importance of strain selection, formulation and application method in the development of a microbial control agent against the desert locust .Low R H should not impede use of this fungus under dry conditions. 1997-11 2018-12-19T07:00:35Z 2018-12-19T07:00:35Z Journal Article https://hdl.handle.net/10568/98606 en Limited Access Informa UK Limited Fargues, J., Ouedraogo, A., Goettel, M.S. & Lomer, C.J. (1997). Effects of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoviride. Biocontrol Science and Technology, 7(3), 345-356. |
| spellingShingle | metarhizium anisopliae entomopathogenic fungi microbial culture temperature humidity spore germination locusts Fargues, J. Ouédraogo, A. Goettel, M.S. Lomer, C.J. Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title | Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title_full | Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title_fullStr | Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title_full_unstemmed | Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title_short | Effect of temperature, humidity and inoculation method on susceptibility of Schistocerca gregaria to Metarhizium flavoride |
| title_sort | effect of temperature humidity and inoculation method on susceptibility of schistocerca gregaria to metarhizium flavoride |
| topic | metarhizium anisopliae entomopathogenic fungi microbial culture temperature humidity spore germination locusts |
| url | https://hdl.handle.net/10568/98606 |
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