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Russian Olive Control.

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Presentation on theme: "Russian Olive Control."— Presentation transcript:

1 Russian Olive Control

2 Russian olive (Eleagnus angustifolia)
THE GOOD Windbreak Wildlife habitat Wildlife feed source Drought tolerant Nitrogen fixation

3 Russian olive (Eleagnus angustifolia)
THE BAD Spread by suckers and seeds Displaces native vegetation Reduces bio-diversity Reduces land use and values

4 Russian olive (Eleagnus angustifolia)

5 Propagation Sexual—spread by birds and other wildlife
Asexual—Stressed or damaged trees readily sucker Key—Kill the crown before plant removal

6 A Noxious Weed In some Utah Counties
Carbon Sevier Duchesne Uintah Grand Wayne San Juan

7 Chemical Application Methods
Foliar Spray Basal Bark Spray Frill Cut Stump Cut

8 Foliar Spray Foliar spraying—complete control is difficult
Care must be taken to apply herbicide to every branch Increased the risk of contaminating the environment or damaging non-target plants. Dilution of the chemical is usually required.

9 Basal Bark Spray Apply herbicide to the lower area of the main trunk(s) of the tree Chemical is absorbed through the bark Reduced the risk of environmental contamination Less effective on trees with corky bark Penetrating oil or diesel may help with absorption to cambium

10 Frill Cut Cut notches through the bark and into the sap wood of the tree Undiluted herbicide is poured or injected into each notch Cuts are made with a downward motion so the notches will hold the herbicide Do not girdle the tree with the chop marks. Environmentally friendly application method that makes very efficient use of herbicide The main difficulty is getting through the thorny lower branches of the tree to access the trunk Undiluted herbicide is applied in small amounts (2cc or less per inch of trunk diameter)

11 Frill Cut

12 Stump Cut The tree is cut down and the stump is immediately (within ten minutes) sprayed or painted with herbicide Cutting down the tree and applying the chemical immediately usually requires two or more people to accomplish Anecdotal evidence indicates this may not be as effective as the frill cut method Undiluted chemical is more effective with this application method

13 Experiment Design Used the Frill Cut method for accuracy of placement and ease of metering Three chemicals Habitat (Arsenal)—28.7% 2-4,D—47.3% Roundup—41.0% Three rates (cc/inch trunk diameter) 1.00 1.50 2.00 Control trees were cut and marked but nothing was applied to the cuts


15 Treatment and Evaluation
The tress were treated October 12, 2005 and evaluated September 5, 2006

16 Control trees showed no evidence of stress or damage
Results Control trees showed no evidence of stress or damage

17 Results Habitat (Arsenal)

18 Results 2,4-D Amine

19 Results Roundup

20 Chemical Effectiveness
Results Chemical Effectiveness Tree #1 Tree #2 Tree #3 Average Control 0.00 2-4,D--1.0 100 95 98.33 2-4,D--1.5 90 96.67 2-4,D--2.0 100.00 Roundup--1.0 80 93.33 Roundup--1.5 Roundup--2.0 Habitat--1.0 Habitat--1.5 Habitat--2.0


22 Results The frill-cut method is effective and reduces environmental contamination Lower application rates appear to be as effective as the higher rates No significant difference in the effectiveness of the different chemicals used The greatest cost, regardless of chemical and application method, is labor to remove the plants

23 Recommendations Treat trees with the frill-cut method
Take care to not girdle the tree with frill cuts Apply 1.0 cc of undiluted chemical into each cut Use of a soil-active chemical could hinder re-vegetation efforts

24 Future Studies Time-of-year effectiveness Biocontrol--goats

25 Questions?

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