Arthropods, 2013, 2(1): 36-41
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Transmission effect of entomopathogenic fungi on population of Tetranychus kanzawai (Kishida) (Tetranychidae: Acarina)

Yayan Sanjaya1, Virginia R. Ocampo2, Barbara L. Caoili2
1Biology Program, Indonesia University of Education, Indonesia
2Crop Protection Cluster, College of Agriculture, University Philippines Los Banos, Philippines

Received 18 November 2012;Accepted 20 December 2012;Published online 1 March 2013

Transmission Effect of Beuaveria bassiana and Metarhizium anisopliae on population of Tetranychus kanzawai was conducted .There were two activities, first by leaf contamination and secondly transmission from infected mite to a group population and were analyzed by probit wi resul LT50. The results showed that Fungal transmission occurs when there is contact with an infected cadaver or any residue left behind on the substrate. All healthy mites placed in contact with infected mites were infected at the end of the trial and covered with the fungus. The LT50 values for T. kanzawai mites, ranged from 2.865 to 4.150 days. All healthy mites placed onto leaf surface contaminated with entomopathogenic fungi through spraying also exhibited fungal infection at the end of the trial. LT50 values of the fungus isolates are summarized in Table 8. Three fungal species were found to have potentials within the value range of 2.223 - 4.206 days. The lowest LT50 value was found in M. anisopliae 6 (2.223 days) while others were not significantly different.

Keywords transmission;Beuaveria bassiana;Metarhizium anisopliae;population;Tetranychus kanzawai;LT50.

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