IR-4 Ornamental Horticulture

Program 2016 & 2017 Research

Priorities

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2015 Pathogen OutcomesProject NCR NER WSR SOR Other TotalBotrytis 0 11 14 0 1 25 (26)Bacteria 0 10 1 10 5 21 (26)Downy Mildew 0 7 1 0 5 8 (13)Crown & Root Rot 4 0 4 0 3 8 (11)Nematode 0 6 1 0 6 7 (13)Phytophthora 4 0 1 2 4 7 (11)Leaf Spot 0 0 0 5 0 5 (5)Powdery Mildew 0 3 1 0 2 4 (6)Pythium 0 0 0 2 4 2 (6)Parasitic Algae 0 0 0 1 0 1 (1)Rose Rosette 0 0 0 0 0 0 (0)Rust 0 0 0 0 0 0 (0)

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2015 Pest OutcomesProject NCR NER WSR SOR Other TotalThrips 4 4 10 4 6 22 (28)Foliar Beetle 0 11 0 1 8 12 (20)Borer (Bark & Ambrosia) 0 3 1 6 3 10 (13)Scale 0 1 1 6 7 8 (15)Whitefly Efficacy 4 0 1 2 5 7 (12)Mealybug 0 0 1 4 12 5 (17)Aphid 0 0 0 4 0 4 (4)White Grub/Root Weevil 0 2 0 1 4 3 (7)Mollusc 0 0 2 1 0 3 (3)Mites & Spider Mites 0 0 0 3 0 3 (3)Lygus 0 0 1 0 4 1 (5)Borer (Flathead & Round) 0 0 0 1 3 1 (4)Flies, Fungus Gnats 0 0 0 0 0 0 (0)Leafminer 0 0 0 0 0 0 (0)Borer (Lep) 0 0 0 0 0 0 (0)

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2015 Weed Science OutcomesProject NCR NER WSR SOR Other TotalIn Season Pre Emergent 0 8 13 12 3 33 (36)Ornamental Grass Herbicide 5 0 3 13 1 21 (22)

Dormant Post Emergent 3 0 3 3 4 9 (13)Field Grown Bulb 0 0 1 0 2 1 (3)In Season Post Emergent 0 0 0 1 0 1 (1)Management of Glyphosate Resistant Weeds 0 0 0 0 0 0 (0)

Liverwort Efficacy & Crop Safety 0 0 0 0 0 0 (0)Specialty Cut Flower Production 0 0 0 0 0 0 (0)Herbicide Safety for Seedlings 0 0 0 0 0 0 (0)Pre Emergent Liquid in Enclosed Structures 0 0 0 0 0 0 (0)

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North Central Region Priorities (Unranked)

• Pre-emergent herbicide crop safety• Ornamental grasses herbicide crop safety• Dormant post-emergent crop safety• Phytophthora and Pythium• Greenhouse thrips and whiteflies

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Northeast Region Priorities (Unranked)• Foliar nematodes ***• Bacteria: Xanthomonas on Begonias• Botrytis: look at products for resistance management• Downy Mildew• Fusarium• Foliar Beetles• Thrips (especially new S. dorsalis biotype)• Borers – ambrosia beetles• Expanding the label for pyrifluxypyrin (sp?) for scale• In season pre-emergent herbicide crop safety (additional

Sedum sp)• Control of yellow nutsedge

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Southern Region Priorities (Ranked)

• Parasitic Algae• Ambrosia beetles (but there is a lack of

products)• Ornamental grasses (add 2 new species)

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Western Region Priorities (Ranked)• Early pre-emergent weeds in field and

container grown ornamentals• Botrytis foliar and shoot disease in Abies sp.

and Tsuga sp., also in greenhouse grown bedding plants such as Geraniums and Begonias.

• Fusarium basal rot in cut flower bulb crops• Thrips (outdoor registrations) in all

ornamental crops

Thank you !Funding for IR-4 Research:USDA-NIFAUSDA-ARSUSDA-APHISLand Grant Institutions

Researchers:All the fine researchers throughout the US and in cooperating countries

IR-4 Personnel:Susan

BierbrunnerMichelle FooEdith LurveySatoru Miyazaki

Mika Pringle-Tolson

Marylee RossBecky SiscoEly Vea

Growers:Who donate time to complete the biennial survey and all those plant materials!

Thank you !Photo by Cristi Palmer