M, Balachander and OK, Remadevi and TO, Sasidharan (2013) Dissemination of Metarhizium anisopliae infection among the population of Odontotermes obesus (Isoptera: Termitidae) by augmenting the fungal conidia with attractants. Journal of Asia-Pacific Entomology, 16 (3). pp. 199-208. ISSN 12268615
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Abstract
Long-term biocontrol strategies for termite management have limited success as the behavioral response exhibited by termites in the presence of entomopathogenic fungi was different. To minimize these responses, a study was conducted to attract the termites towards the treated area by augmenting fungal conidia with a mixture of attractants such as sugarcane bagasse, sawdust and cardboard powder. In laboratory experiments, mortality due to the horizontal transmission of Metarhizium anisopliae infection among Odontotermes obesus workers and soldiers was 50 to 98% and 16 to 78% for the five isolates tested. The foraging activity of workers and soldiers increased from 23 to 58% for IWST-Ma13 when conidia were mixed with attractants. In a field
study, the weight loss of stakes treated with conidial attractant decreased to 10.9 g compared to dry conidial treatments (19.3 g) for IWST-Ma13 after five months. Similarly, the width of mud galleries covering the tree bark was reduced when treated with conidial baits and gunny bags containing conidial attractant. In treated mounds, as the Acoustic emission signal voltage decreased from the threshold voltage level, the relative magnitude signal (RMS) remains low after five months of treatments with that of the control. From this study it was observed that the mixing of conidia with attractants could augment the dissemination potential of fungal infection among the termites. By adapting attractant based Metarhizium baits and dusting of conidial attractant mixture inside mounds may augment the dissemination potential in epizootic transmission of fungal infection.
Item Type: | Article |
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Additional Information: | Copyright of this article belongs to the Elsevier |
Uncontrolled Keywords: | Dissemination, Augmentation, Metarhizium, Attractant, Termite |
Subjects: | A ATREE Publications > G Journal Papers |
Divisions: | SM Sehgal Foundation Centre for Biodiversity and Conservation > Biodiversity Monitoring and Conservation Planning |
Depositing User: | ATREE Bangalore |
Date Deposited: | 13 Dec 2024 09:12 |
Last Modified: | 13 Dec 2024 09:12 |
URI: | http://archives.atree.org/id/eprint/321 |