Seasonal Occurrence of Tetranychus kanzawai and Control Efficacy of Alternate Use of Natural Enemy and Miticide in Rubus coreanus Field
2010
Lim, J.R., Jeollabuk-do Agricultural Research and Extension Services, Iksan, Republic of Korea | You, J., Jeollabuk-do Agricultural Research and Extension Services, Iksan, Republic of Korea | Cheong, S.S., Jeollabuk-do Agricultural Research and Extension Services, Iksan, Republic of Korea | Choi, D.C., Jeollabuk-do Agricultural Research and Extension Services, Iksan, Republic of Korea | Hwang, C.Y., Chonbuk National University, Jeonju, Republic of Korea
Seasonal occurrence and suitable time of control of Tetranychus kanzawai along with the control efficacy of the alternative use of natural predator and miticide was investigated in Rubus coreanus (Miquel). T. kanzawai appeared in late May with its peak between June and July, and decreased after August in R. coreanus. In Iksan, T. kanzawai estimates show peaks 2~4 times per year during the investigation periods from 2006 to 2008 in R. coreanus fields. Suitable time of control of T. kanzawai was in early to mid May. And control effects of T. kanzawai was improved with an alternated control plot, treating miticides in early-occurrence of T. kanzawai and then releasing the natural predator (Phytoseiulus persimilis Anthias-Henriot). Also, the yields of R. coreanus was highest in the alternated control plot of 638kg/10a compared to non-treatment of 559kg/10a.
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