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David Zlesak

11 years ago

Introduction on the HMF page linked below.

Here is a link that might be useful: David Zlesak

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Comments (5)

sandandsun
Original Author
11 years ago
last modified: 9 years ago
2012 Minature Award of Excellence!

Here is a link that might be useful: Oso Happy Petit Pink (ZLEmarianneyoshida)
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henry_kuska
11 years ago
last modified: 9 years ago
For some reason the link to this page would not copy so I copied the whole page (without pictures).
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David Zlesak
Assistant Professor of Horticulture

Courses Taught:
Horticulture 120: Plants and Society
Horticulture 161: Introduction to Plant Science
Horticulture 200: Plant Propagation
Horticulture 352: Woody Landscape Plants
Horticulture 369: Plant Tissue Culture
Horticulture 452: Arboriculture and Nursery Management

Research Interests:
•Coordinator of the Northern Earth-Kind® Rose Trials (purpose is to identify well-adapted, low maintenance landscape roses for our northern Midwest region).
•Woody plant pathology.
•Breeding regionally-adapted woody and herbaceous landscape plant cultivars.
Publications:
Lockhart, B, D.C. Zlesak, and J. Fetzer, 2011. Identification and partial characterization of six new viruses of cultivated roses in the USA. Acta Horticulturae 901:139-147.

Zlesak, D.C., V.M. Whitaker, S. George, and S.C. Hokanson, 2010. Evaluation of roses from the Earth-Kind® Trials: black spot (Diplocarpon rosae Wolf) resistance and ploidy. HortScience 45:177-1787.

Zlesak, D.C., 2009. Pollen diameter and guard cell length as predictors of ploidy in diverse rose cultivars, species, and breeding lines. In: Zlesak DC (Ed) Roses. Floriculture and Ornamental Biotechnology. 3(Special Issue 1):53-70.

Harp D.A., Zlesak, D.C., Hammond, G., George, S., and W. Mackay, 2009. Earth-Kind® Rose Trials��"Identifying the World’s Strongest, Most Beautiful Landscape Roses. In: Zlesak DC (Ed) Roses. Floriculture and Ornamental Biotechnology. 3(Special Issue 1):166-175.

Zlesak, D.C. and B.J. Hanson, 2008. ‘Tuscan Sun’ Helopsis. HortScience 43:927-928. Grabowski, M.A, Zlesak, D.C., and J.H. Gillman, 2008. Control of black spot on rose. Plant Disease Management Reports 2:OT005

Zlesak, D.C., 2007. Factors affecting seed germination of Heliopsis helianthoides (L.) Sweet. Seed Science and Technology 35:577-594.

Zlesak, D.C., Zuzek, K. and S.C. Hokanson, 2007. Rose pollen viability over time at varying storage temperatures. Acta Horticulturae 751:337-343.

Zlesak, D.C., Bradeen, J.M. and N.O. Anderson, 2007. The use of AFLP markers to resolve clonal origin and integrity in rose, hydrangea, and lily. Floriculture and Ornamental Biotechnology. 1(1):51-60.

Horticulture Specializations:
Woody plant identification, culture, pathology, and genetics; Plant propagation; and Plant breeding.

Cultivars:
•First Editions® Little DevilTM ninebark (PPAF)- Compact ninebark that won the 2011 American Nursery Landscape Association’s Garden Idol Award as the best new plant of the year
•Oso HappyTM Smoothie rose (PPAF)
•Oso HappyTM Petit Pink rose (PP22,205)- Winner of the American Rose Society Award of Excellence for miniature roses 2012

•Oso HappyTM Candy Oh! rose (PP20,471)
•'Tuscan Sun' heliopsis (PP18,763)
•Monarch MedianoTM and Monarch GrandeTM series of ageratum (PPAF)

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This post was edited by henry_kuska on Thu, Feb 28, 13 at 22:26
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There are rose diseases out there that are important to those of us in North America. What is in the scientific papers (Yes, I do read them) is important to many of us for the continued health and survival of our gardens. Do a search about Downey Mildew. Then do a search about Chili Thrips. Then look to Rose Rosette. Then thank your lucky stars that so far, these pestilences aren't being propagated in your part of the rose world by people who can't be bothered to learn about both the good and bad sides of rose growing.
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"The virus used in this study was obtained from naturally infected plants of Rosa rugosa Ã¢ÂÂCharles AlbanelÃ¢ÂÂ." This is all that I could find in the full paper. It does refer to a 2011 paper: Lockhart B, Zlesak D, Fetzer J (2011) Identification and partial characterization of six new viruses of cultivated roses in the USA. Acta Hortic 901:139Ã¯Â¿Â½Ã¯Â¿Â½"147 Since the 2011 paper has Jodi Fetzer's of the New York Botanical Garden name as one of the authors, perhaps the sample came from there. Please notice that this is only a "PERHAPS". "Recently, we described a virus with spherical particles [8] associated with one of several new foliar diseases of rose. The virus was named Rosa rugosa leaf distortion virus (RrLDV) after the typical symptoms associated with infection by this virus. Both the disease and the virus were graft transmitted from diseased to healthy R. rugosa, suggesting that RrLDV is likely the causal agent of the disease (our unpublished results). The objectives of this study were to characterize the RrLDV genome and determine its taxonomic and phylogenetic relationship to known viruses." ------------------------------- H.Kuska comment; I am frustrated that so many of these individual papers offer so little information of usefullness to the average rose grower. Possibly the editors pressure the authors to be as consise as possible.
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Thank you, Kentucky Rose. You help me tremendously by your keen observation. I'm grateful for your experience, since it confirms my hunch that the Milorganite (sewage sludge) I test recently, with 4% iron, is causing my roses to break out in B.S. I DID NOT put Milorganite on Frederic Mistral, he broke out in B.S. on bagged cow-manure alone. . Candida Yeast is a fungi. Check out this excerpt from about yeast infection from Livestrong.com website: "At the same time, iron also improves the virulence of the candida species, which is the ability of the pathogen to invade the host or human cells, according to the authors of the study. Another study in the March 2011 issue of the journal "PLOS Pathogens" also points out that individuals taking iron supplements to treat anemia and related disorders have an increased risk of getting candida infections." Another excerpt from below link: "To successfully sustain an infection, nearly all bacteria, fungi and protozoa require a continuous supply of host iron." "Mechanisms of microbial iron acquisition are determinants for the kinds of cells, tissues and hosts in which pathogens can flourish." **** What's wrong with Milorganite I use which cause such break-out of black spots in my roses? Its NPK is 5-2-0, with zero potassium, it's sewage sludge, high in salt. Its 4% iron promotes fungal growth. Thank you, Kentuckyrose, for your info: "I used alfalfa meal for the tea, added Epsom salt, iron granules, and dyna bloom (liquid fertilizer). Last week I put alfalfa pellets and fish meal down and worked it into the soil ... I just can't get rid of the BS." Alfalfa meal pH is 5.7, zero salt. Epsom salt (magnesium sulfate) is salty, deficiency is rare except in sandy soil ... my clay is tested exceedingly high in magnesium. Fish meal is salty, high in phosphorus (great B.S. inducer). Iron granules is another fungal promoter. Dyna bloom NPK is 3-12-6, super-high in phosphorus, that would zap out the zinc (a strong anti-fungal nutrient). Roses break out in B.S. when they are stressed out, be it too much salt, and not enough potassium. In humans, a low-potassium & high salt diet will cause stroke. In plants, a low-potassium & high salt intake is a fungal promoter, like iron. Mill's Magic is low in potassium, high in Milorganite (salty sewage sludge). Another recipe for black spots. One lady in clay soil & hot climate killed over a dozen of her roses by fertilizing with Mill's Magic monthly. THANK YOU, Kentucky_rose, you helped me with my garden. I'll quit using Milorganite, and return that bag of red-lava rock (high in potassium, plus high iron). I'll go back to what I did last 3 years with very clean roses by using alfalfa NPK 2-1-2 (decent potassium & calcium), then topped with horse manure (pH 8) and high in potassium & calcium. Below is the base of Golden Celebration, picture taken in late October in its 3rd year. It has layers of horse manure & alfalfa meal ... all my roses were clean for 3 years, until I quit that approach. Here is a link that might be useful: Iron: Fungal and protozoa infections This post was edited by Strawberryhill on Thu, Aug 7, 14 at 10:11
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sandandsun
Original Author
11 years ago
last modified: 9 years ago
henry_kuska,
Woud you strongly consider editing out the contact information for Mr. Zlesak? I can think of no reason why anyone on this forum should contact him. And we've been informed that such information contributes to spam, etc.
I personally would feel awful if a post intended to honor an accomplishment were to be soured in such an unintended way. We have to think about these things these days.
Thank you for considering my suggestion.
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henry_kuska
11 years ago
last modified: 9 years ago
O.K. I removed it, but if the link worked, the information would have been available so it is not private information.

This is the link that would not work on my computer:

http://www.uwrf.edu/FacultyStaff/1840024.cfm

Here is a link that might be useful: link for above
0
User
11 years ago
last modified: 9 years ago
Posting personal contact info here is totally inappropriate; please don't.
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