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Rameshwar Singh Rattan,Ashok B. Hadapad,Annette Reineke,Prem R. Gupta,Claus P.W. Zebitz 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.2
Cotesia are larval endoparasitoids and are potential biocontrol agents for various insect pests. In the present study, we attempted to detect the allele-specific ftsZ gene of Wolbachia in Cotesia spp. obtained from different geographical locations. Samples of Cotesia plutellae originating from India (Bangalore and Ludhiana), Kenya,and South Africa and samples of C. glomerata from India (Solan) confirmed the presence of Wolbachia. However, C. plutellae samples from the Kullu region of India did not show infection with Wolbachia. ftsZ sequences showed a high degree of homology within the species (N99%). The low genetic distance in the infected Cotesia populations indicated a single ancestral type, and distance to and from the outgroup suggested that populations are from the same species. Phylogenetic grouping of Cotesia species on the basis of geographic origin showed that the Wolbachia strain is closely related to strains that infect phylogenetically distant hosts.
Narasimha P. Reddy,Akbar P. Ali Khan,Uma K. Devi,Hari C. Sharma,Annette Reineke 한국응용곤충학회 2009 Journal of Asia-Pacific Entomology Vol.12 No.4
Experiments were done to test if Beauveria bassiana can become an endophyte in sorghum and confer protection from stem borer. Four-week-old sorghum seedlings were treated with B. bassiana. The plants were examined for endophytic presence of B. bassiana, 30 and 60 days after treatment. Stem cultures from treated plants showed growth of B. bassiana. PCR amplification using fungal specific primers for a conserved region of β tubulin gene yielded identical 360 bp products from both B. bassiana and treated sorghum plants. In a subsequent experiment, B. bassiana treated and untreated (control) sorghum plants were artificially infested with stem borer (Chilo partellus) larvae 15 days post treatment and the extent of damage was compared. About 40% of the control plants developed dead heart while no plant in the B. bassiana treated plot did. In the surviving control plants, stem tunneling by shoot borer was significantly higher compared to B. bassiana treated sorghum plants. Experiments were done to test if Beauveria bassiana can become an endophyte in sorghum and confer protection from stem borer. Four-week-old sorghum seedlings were treated with B. bassiana. The plants were examined for endophytic presence of B. bassiana, 30 and 60 days after treatment. Stem cultures from treated plants showed growth of B. bassiana. PCR amplification using fungal specific primers for a conserved region of β tubulin gene yielded identical 360 bp products from both B. bassiana and treated sorghum plants. In a subsequent experiment, B. bassiana treated and untreated (control) sorghum plants were artificially infested with stem borer (Chilo partellus) larvae 15 days post treatment and the extent of damage was compared. About 40% of the control plants developed dead heart while no plant in the B. bassiana treated plot did. In the surviving control plants, stem tunneling by shoot borer was significantly higher compared to B. bassiana treated sorghum plants.