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Juliya, R. F.
- Diversity of Entomopathogenic Fungi in the Kerala Part of the Western Ghats
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Source
Indian Forester, Vol 138, No 2 (2012), Pagination: 182-188Abstract
A survey carried out in the Kerala part of the Western Ghats revealed high diversity of entomopathogenic fungi. A total of 401 fungi were identified from 341 insect cadavers during the study period of which 316 fungi were collected from moist deciduous forests (MDF) and 85 from teak plantations. Fungi were isolated from insects belonging to 10 orders with the highest isolations from the order Lepidoptera (120). Fifty eight species of fungi belonging to 24 genera were identified. Cadavers collected from MDF and teak plantations yielded 52 and 29 species respectively. Majority of the identified species belonged to the class Deuteromycotina. The overall abundance of entomogenous fungi was less in both MDF and teak plantations as indicated by rank abundance plots. Overlapping k-dominance curves showed the shift of dominance relative to species richness of fungi between the forest circles of both MDF and teak plantations. Rarefaction analysis for species richness showed that more species could be collected, if the sampling process had continued. The diversity of fungi was high in MDF compared to teak plantations. Diversity was high for northern and central forest circle of MDF and teak plantations respectively. Individual abundance and species abundance of fungi was high during the wet period. The fungi identified included commercially important and medically useful species.Keywords
Diversity, Entomopathogenic Fungi, Western Ghats, Insect Cadavers
- Laboratory Evaluation of Four Fungal Pathogens against the Teak Defoliator, Hyblaea puera (Cramer) (Lepidoptera: Hyblaeidae)
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Authors
Affiliations
1 Forest Protection Division, Kerala Forest Research Institute, Peechi 680 653, Thrissur, Kerala, IN
1 Forest Protection Division, Kerala Forest Research Institute, Peechi 680 653, Thrissur, Kerala, IN
Source
Journal of Biological Control, Vol 23, No 3 (2009), Pagination: 285-293Abstract
Effect of four entomopathogenic fungi, Beauveria bassiana, B. brongniartii, Paecilomyces fumosoroseus and Metarhizium anisopliae, isolated from different host insects, was tested in the laboratory against the teak defoliator, Hyblaea puera (Cramer) (Lepidoptera: Hyblaeidae) to assess their virulence and efficiency. Five different concentrations, 2x106, 4x106, 6x106, 8x106 and 1x107 conidia ml-1were directly and indirectly applied onto third instar larvae of H. puera. All the four fungi tested under both application methods were pathogenic to H. puera with higher efficiency in direct application than indirect application. At 9 days after exposure, the mean per cent mortality obtained was 100, 93.02, 93.02 and 66.74%, respectively, for B. bassiana, B. brongniartii, P. fumosoroseus and M. anisopliae at the highest concentration of 1 x 107 conidia ml-1 in direct application. Mortality of the larvae varied according to the concentration of conidia, method of application and fungi. The lowest LC50 (1.89 x 106 conidia ml-1) and LT50 (91.18 hr) values obtained for B. bassiana in direct application showed that B. bassiana was more pathogenic to H. puera than the other three fungi.Keywords
Beauveria bassiana, B. brongniartii, Entomopathogenic Fungi, Hyblaea puera, Metarhizium anisopliae, Paecilomyces fumosoroseus.Full Text
References
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- Seasonal Incidence of Beauveria bassiana on Gargara mixta Buckton (Hemiptera: Membracidae) and B. Brongniartii on Chrysomelids (Coleoptera: Chrysomelidae) in the Central Forest Circle of Kerala
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Authors
R. F. Juliya
1,
R. V. Varma
1
Affiliations
1 Forest Protection Division, Kerala Forest Research Institute, Peechi 680653, Kerala, IN
1 Forest Protection Division, Kerala Forest Research Institute, Peechi 680653, Kerala, IN
Source
Journal of Biological Control, Vol 23, No 4 (2009), Pagination: 471-473Abstract
Surveys for entomopathogenic fungi in the central forest circle of Kerala revealed the seasonal incidence of Beauveria bassiana in small pockets on Gargara mixta Buckton (Hemiptera: Membracidae) feeding on the leaves of Helicteres isora (Sterculiaceae) in the moist deciduous forests (MDF) at Vazhachal. Incidence of B. brongniartii on chrysomelid beetles (Coleoptera) feeding on teak leaves was also observed in small pockets in teak plantations. Infection was prevalent during post-monsoon months. The infection due to B. bassiana and B. brongniartii ranged from 36.8 to 100 and 45.5 to 100 per cent, respectively. The seasonal incidence of naturally occurring entomofungal pathogens, B. bassiana and B. brongniartii form small scale epizootics in nature under favourable environmental conditions. Such virulent pathogens can be exploited in pest control programmes.Keywords
Entomopathogenic Fungi, Beauveria bassiana, Beauveria brongniartii, Gargara mixta.Full Text
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- Rajak, R. C., Agarwal, G. P., Khan, A. R. andSandhu, S. S. 1993. Susceptibility of teakdefoliator (Hyblaea puera Cramer) andteak skeletonizer (Eutectona machaeralisWalker) to Beauveria bassiana(Balsamo) Vuill. Indian Journal ofExperimental Biology, 31: 80-82.
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