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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 44, Number 4 (1993) → Economic Analysis of Two-Spotted Spider Mite Management on Greenhous-Grown Poplars

Economic Analysis of Two-Spotted Spider Mite Management on Greenhous-Grown Poplars

The two-spotted spider mite - Tetranychus uriticae Koch - is a perennial pest problem on greenhouse-grown poplar (Populus spp.). Although weekly applications of miticide effectively managed this pest, other issues such as management costs and worker safety prompted an effort to test another approach. An integrated pest management (IPM) program for spider mite suppression was developed using pest monitoring, release of predatory mites-Phytoseiulus persimilis Athias-Henriot and Amblyseius californicus (McGregor)-and spot-treating with a miticide when necessary. One year after implementation of this IPM program, mite populations have been suppressed to acceptable levels, pest management costs have reduced by 81%, and concerns regarding miticide exposure to personnel sharing the greenhouse facilities have been eliminated.


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Author(s): Vincent A. Smith, David B. Orr, Elwood R. Hart

Publication: Tree Planters' Notes - Volume 44, Number 4 (1993)

Volume: 44

Number: 4