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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hussain, Abid Rizwan ul Haq, Muhammad Al Ayedh, Hassan Ahmed, Sohail Al Jabr, Ahmed Mohammed |
| Copyright Year | 2015 |
| Abstract | The entomopathogenic fungal infection of target hosts depends on pathogen fitness and host defence mechanisms. Pathogen-host interactions in red palm weevil, Rhynchophorus ferrugineus larvae are poorly understood. In order to explore this interaction, 4th, 8th, and 12th instar red palm weevil larvae were immersed in conidial suspensions of four isolates of Beauveria bassiana. Significant differences in the virulence of the tested isolates were revealed by LT50 values. Conidia of B8463, a highly virulent isolate, showed 33.53 % higher relative hydrophobicity and twice as much Pr1 activity than conidia of B8465. Growth indices, calculated after 72 h of incubation, revealed significant differences in the food utilization efficiencies of all studied larval instars infected with different isolates. Conidial infection with B8463 caused 39–45 % reduction in efficacy of consumption of ingested food (ECI) and 55–61 % reduction in digested food (ECD). The least virulent isolate, B8465, caused the smallest reduction in ECI (2–4 %) and ECD (3–9 %). Furthermore, enhanced expression of target antioxidant genes (catalases and peroxidase) was observed in larvae infected with virulent isolates. Similarly, approximate digestibility showed an opposite trend, with the highest values being recorded from samples infected with the most virulent conidia (B8463) at each studied larval instar. In conclusion, isolate B8463 significantly affected the growth and development of red palm weevil larvae and has good potential for use in eco-friendly R. ferrugineus management. |
| Starting Page | 849 |
| Ending Page | 859 |
| Page Count | 11 |
| File Format | |
| ISSN | 13866141 |
| Journal | BioControl |
| Volume Number | 60 |
| Issue Number | 6 |
| e-ISSN | 15738248 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-06-17 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Defense Entomopathogenic fungi Pathogen fitness Nutritional indices Red palm weevil Virulence Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioral Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Insect Science Agronomy and Crop Science |
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