Search found 43 matches

by matt lustig
Wed Sep 30, 2020 9:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Seeds and RRV
Replies: 12
Views: 1117

Seeds and RRV

If I recall correctly, I believe that rose rosette virus is rarely (if ever) transmitted via seeds. Can anyone confirm whether this is correct? I recently had to rouge (based upon suspected RRV) a variety that I had wanted to use in breeding, and I hope to at least plant the seeds that I harvested f...
by matt lustig
Tue Jul 07, 2020 1:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Identify rose
Replies: 4
Views: 1078

Re: Identify rose

Hi Judith; You may already be aware of this, but I just wanted to point out that in your photograph, the vast majority of the leaves are from a species commonly called Virginia creeper (in other words, the vast majority of those leaves don't belong to that rose). Virginia creeper is native to much o...
by matt lustig
Wed Jul 01, 2020 12:12 pm
Forum: Rose Hybridizers Association Forum
Topic: Handling cold-hardiness
Replies: 18
Views: 2407

Handling cold-hardiness

Although USDA hardiness zones are based upon mean minimum temperature, I have generally thought of "actual hardiness" as being due to a lot of factors other than just temperature. For instance, I've thought of actual hardiness as being very influenced by wind exposure (which dries out buds, presumab...
by matt lustig
Tue Jun 30, 2020 9:23 am
Forum: Rose Hybridizers Association Forum
Topic: Identification Request #1 (from near Caneadea, NY)
Replies: 4
Views: 901

Re: Identification Request #1 (from near Caneadea, NY)

Stefan, thank you for your input regarding the identification of this rose. When I had first collected it, I had speculated (largely based upon its collection location right next to a large pond) that it was probably R. palustris . I was almost certainly wrong, and your proposed identification as R....
by matt lustig
Sun Jun 28, 2020 8:43 am
Forum: Rose Hybridizers Association Forum
Topic: My method in a nutshell, esp. the case for using mixed pollen
Replies: 9
Views: 2152

Re: My method in a nutshell, esp. the case for using mixed pollen

Marty, thank you for sharing your insights and method. Although I don't plan to switch over to mixed pollen anytime soon, your ideas are valid and insightful. By way of comparison, before I became significantly interested in roses, I had a background of some experience with chestnuts. In many cases,...
by matt lustig
Sat May 30, 2020 10:37 am
Forum: Rose Hybridizers Association Forum
Topic: Identification Request #2 (from near Biglerville, PA)
Replies: 3
Views: 429

Re: Identification Request #2 (from near Biglerville, PA)

As additional information, there are hairs present on the bottom of the terminal leaflets.
by matt lustig
Sat May 30, 2020 9:19 am
Forum: Rose Hybridizers Association Forum
Topic: Identification Request #2 (from near Biglerville, PA)
Replies: 3
Views: 429

Identification Request #2 (from near Biglerville, PA)

I would be grateful for assistance in identifying this rose. Note the following details: Collected: Farmland hedgerow near Biglerville, PA (south-central Pennsylvania) Height: about 1 to 1.5 feet Stems: Older stems brown. Prickles: Moderate on upper portion of plant; absent or nearly absent on lower...
by matt lustig
Sat May 30, 2020 9:12 am
Forum: Rose Hybridizers Association Forum
Topic: Identification Request #1 (from near Caneadea, NY)
Replies: 4
Views: 901

Re: Identification Request #1 (from near Caneadea, NY)

Final Image. Note that the opposite sides of stipules are folded towards each other, sometimes resulting in the stipules appearing narrower than they actually are.
by matt lustig
Sat May 30, 2020 9:02 am
Forum: Rose Hybridizers Association Forum
Topic: Identification Request #1 (from near Caneadea, NY)
Replies: 4
Views: 901

Identification Request #1 (from near Caneadea, NY)

I would be grateful for assistance in identifying this rose. Note the following details: Collected: With permission along a VERY rural roadside near Caneadea, NY (south-western New York). Now growing in south-central Pennsylvania. Height: 4-5 feet Stems: Older stems reddish-brown Prickles: Sparse to...
by matt lustig
Mon May 25, 2020 6:33 pm
Forum: Rose Hybridizers Association Forum
Topic: Multiflora Rose review
Replies: 6
Views: 1170

Re: Multiflora Rose review

I was trying to find information recently if with R. multiflora being deemed a noxious weed in many states, if it was legal to sell roses budded on it in those states. I can't really find anything specific. David, I am rather familiar with the Pennsylvania Controlled Plant and Noxious Weed Act (201...
by matt lustig
Thu Jan 30, 2020 7:02 pm
Forum: Rose Hybridizers Association Forum
Topic: Woody Plant Seed Manual (USDA)
Replies: 1
Views: 406

Re: Woody Plant Seed Manual (USDA)

Sarah, thanks for encouraging the use of this great resource. Very worthwhile for individuals who raise woody plants, whether that be Rosa or some other genera. The USDA has evidently been putting out updated versions of this resource for more than a half century....I know because some years back my...
by matt lustig
Mon Jan 27, 2020 6:42 pm
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 15
Views: 1506

Re: Worms eating seeds

Larry, I stand corrected and agree with your colleague regarding the size of common free-living nematodes. The free-living nematodes that I've seen are considerably smaller than the creatures in Jbergeson's picture...I should have thought of size, not just appearance. Oops!...somewhat embarrassing o...
by matt lustig
Sun Jan 26, 2020 8:00 am
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 15
Views: 1506

Re: Worms eating seeds

my medium is predominantly peat. I use the peat as it ostensibly has enzymes that inhibit fungal growth, but wonder if the heat of sterilization wouldn't destroy those enzymes. Philip, that's interesting. I've never used peat with rose seeds--I've mostly used vermiculite to stratify rose seeds and ...
by matt lustig
Sun Jan 26, 2020 6:52 am
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 15
Views: 1506

Re: Worms eating seeds

They seem to be soil nematodes. Yes, I agree with Giessen. I used to raise nematodes to feed small fish fry, and also used to let my students look at nematodes under magnification as part of my science classes. The terrestrial nematodes in the aquarium hobby are frequently called "microworms", alth...
by matt lustig
Tue Jan 21, 2020 12:59 pm
Forum: Rose Hybridizers Association Forum
Topic: I'm confused: a diploid?
Replies: 16
Views: 1792

Re: I'm confused: a diploid?

Why Wasagaming ended up as a diploid. Duane, I have wondered similarly about some roses. For instance, when researching Spin-hybrid roses, I had noticed that 'Harrison's Yellow' and 'Namdalsrosen' are listed as triploid, in spite of their purported parents all being tetraploid. I suppose one option...
by matt lustig
Thu Jan 16, 2020 5:21 am
Forum: Rose Hybridizers Association Forum
Topic: Is every rose seed completely unique?
Replies: 17
Views: 1283

Re: Is every rose seed completely unique?

...puzzled about a book saying that the seedlings of species roses are identical to their parents... Truly identical is a high bar to reach, and almost unequivocally such a book is incorrect. I use what I believe is a common-sense definition of sexual reproduction in plants and animals, wherein sex...
by matt lustig
Fri Jan 10, 2020 9:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Soil Mix for Seedlings
Replies: 2
Views: 447

Re: Soil Mix for Seedlings

If you go to the top of the forum webpage, you can search old threads on this topic with keywords "soil mix" or similar. There seem to be some good ideas posted. Otherwise, I have just 2 comments: 1. For hardwood plants generally (including but not limited to roses) I prefer to make my own mix with ...
by matt lustig
Wed Jan 08, 2020 8:07 pm
Forum: Rose Hybridizers Association Forum
Topic: Photoperiod and Temperature
Replies: 1
Views: 279

Re: Photoperiod and Temperature

That's an interesting concept Karl. See https://www.researchgate.net/publication/281600754_Early_flowering_in_chestnut_species_induced_under_high_dose_light_in_growth_chambers for an interesting similar example in chestnuts. In my experience chestnuts in the field may produce staminate flowers in ab...