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United States Department of Agriculture

Agricultural Research Service

Research Project: Molecular Resources for the Improvement of Tropical Ornamental and Fruit Crops

Location: Tropical Plant Genetic Resources and Disease Research

Title: Management of anthurium decline caused by Radopholus similis

Authors
item Sipes, Brent -
item Myers, Roxana
item Lichty, Joanne -
item Sewake, Kelvin -

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: July 2, 2013
Publication Date: December 31, 2013
Citation: Sipes, B.S., R. Myers, J. Lichty, K. Sewake. 2013. Management of anthurium decline caused by Radopholus similis. Journal of Nematology. 45(4):317-318.

Technical Abstract: Anthurium decline is a chronic problem in anthurium production in Hawaii. Anthurium decline has worsened with the removal of fenamiphos from the market. Growers need environmentally sound post-plant treatments to augment preplant management tactics. Avermectin (Avid, monthly), thiophanate-methyl (Cleary 3336 once every 3 months), spinosad (Conserve once every 2 months), spirotetramat (Movento, once every 6 months), and imidacloprid (Provado once every 6 months) were evaluated in a shade-house experiment. Each treatment was replicated over three plots containing 12 plants. Three months after transplanting, Anthurium andraeanum were inoculated with Radopholus similis. One month after inoculation, treatments were applied at labeled rates. Just before application of the first treatment, a single plant from each plot was arbitrarily selected for a nematode assay. A single plant was collected every 10 weeks for the duration of the experiment. By 14 weeks after the initial treatment, all the treatments had lower nematode populations per gram root compared to the untreated plants. Avermectin had the highest population and imidacloprid had the lowest nematode populations per gram root. By 6 months, imidacloprid, spirotetramat, and thiophanate-methyl had the highest nematode populations among those anthurium receiving postplant treatment but all the treatments maintained nematode populations lower than the untreated plants. These treatments were still 69%, 78%, and 84% lower than the untreated plants. All of these products may provide postplant treatment options that can aid in the management of anthurium decline.

Last Modified: 10/21/2014
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