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W 329An Ornamental Plant Pest Management Guideand Pesticide Rotation Planning AidControl Options for Nursery, Greenhouse, Interiorscape, and Commercial Landscape Use Sites

An Ornamental Plant Pest Management Guide and Pesticide RotationPlanning AidControl Options for Nursery, Greenhouse, Interiorscape, and Commercial Landscape Use SitesJuang-Horng “JC” ChongAssociate ProfessorDepartment of Agricultural and Environmental SciencesClemson UniversityWilliam E. KlingemanProfessorDepartment of Plant SciencesUniversity of Tennessee Institute of AgricultureFrank HaleProfessorDepartment of Entomology and Plant PathologyUT ExtensionUniversity of Tennessee Institute of AgricultureFor additional information, contact your county Extension office, or:Clemson UniversityPee Dee Research and Education Center2200 Pocket RoadFlorence, SC 29506-9727www.clemson.eduUT Institute of AgricultureUT Extension2621 Morgan Circle121 Morgan HallKnoxville, TN 37996extension.tennessee.edu

Special Notes Regarding Use of This Publication: Pest resistance to insecticides and acaricides is a growing concern. Efforts to limit pesticide resistance should be an active part of IPMdecision-making. Populations of pest species infesting ornamental plants—like Tetranychus and Panonychus spider mites, western flowerthrips, glasshouse and silverleaf whiteflies, and green peach aphids—are among the top 12 species to have developed resistance tomultiple pesticide active ingredients (a.i.) spanning several chemical classes. Cross-resistance by populations of pest arthropods isincreasingly common to multiple a.i. products within an IRAC group. Serial applications to control a generational cycle of a pest shouldNOT be made using a.i. products within an IRAC Group. Cross-resistance occurs much less commonly between IRAC groups. Seefootnote 25 for information about recommendations for rotation between IRAC groups, particularly when managing select pest populations. More detailed information about modes of action and pesticide resistance will be forthcoming in a publication titled “UnderstandingInsecticide and Miticide Modes of Action Used to Manage Arthropod Pests of Ornamental Plants.” Product labels change frequently and will include more details and specifics about potential phytotoxity that may result in certain plantspecies when products are applied or used at certain rates. All product labels should be reviewed prior to treatment application. Footnote 12as provided within the chart can assist in indicating products with labels that may provide additional details regarding plant safety. Many product labels, particularly among generic products (e.g., carbaryl, bifenthrin, imidacloprid and others) differ in many regards,including which pests may be controlled, details about plant safety/phytotoxicity, re-entry intervals, etc. It is the applicator’s responsibilityto consult each product label prior to application and understand its restrictions and limitations.University of Tennessee Disclaimer NoticeThis publication contains pesticide recommendations that are subject to change at any time. The recommendations in this publication are provided only as a guide. It is always thepesticide applicator's responsibility, by law, to read and follow all current label directions for the specific pesticide being used. The label always takes precedence over therecommendations found in this publication. Use of trade or brand names in this publication is for clarity and information; it does not imply approval of the product to the exclusionof others that may be of similar, suitable composition, nor does it guarantee or warrant the standard of the product. The author(s), the University of Tennessee Institute ofAgriculture and University of Tennessee Extension assume no liability resulting from the use of these recommendations.Clemson University Precautionary StatementIn order to protect people and the environment, pesticides should be used safely. This is everyone’s responsibility, especially the user. Read and follow label directions carefullybefore you buy, mix, apply, store or dispose of a pesticide. It is a violation of State and Federal Laws to use pesticides in a manner inconsistent with its label.Clemson University Disclaimer StatementPesticides recommended in this publication were registered for the prescribed uses when printed. Pesticide registrations are continuously being reviewed. Should registration of arecommended pesticide be canceled, Clemson University would no longer recommend it. This information is supplied with the understanding that no discrimination is intendedand no endorsement by the Clemson University Cooperative Extension Service is implied. Brand names of pesticides are given as a convenience and are neither an endorsementnor guarantee of the product nor a suggestion that similar products are not effective. Use pesticides only according to the directions on the label. Follow all directions, precautionsand restrictions that are listed.

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