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very recent mite research
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Posted by henry_kuska z5 OH (kuska@neo.rr.com) on Fri, Oct 30, 09 at 20:10
| See:
http://www.ingentaconnect.com/search/article?title=roses&title_type=tka&year_from=1998&year_to=2009&database=1&pageSize=20&index=2 |
Here is a link that might be useful: link for above
Follow-Up Postings:
RE: very recent mite research
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| Roughly summarizing, reducing fertilizer to 1/2 the normally recommended level reduced spider mite populations on greenhouse roses without reducing the number of cuttable flowers or length of stems. There was a reduction in overall green growth (blind shoots) and a slight reduction in petal count. Reducing fertilizer had an additive value when combined either with predatory mites (persimilis) or miticide (Floramite). The fertilizer was 15-5-15 soluble with trace and minors. Extra nitrogen and phosphorus in plant tissues increases reproduction of plant-feeding mites and thrips. |
RE: very recent mite research
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| Makes sense; the mites use the nutrients in the plants just as we do with what we eat. Higher nitrogen and phosphorus content in plants makes for more nutritious food, and better growth in the animals eating the plants. |
RE: very recent mite research
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| Our San Diego, show rose guru, Dick Streeper, recommends 1/2 strength only Miracle Grow applications. Could be one of the reasons he has found this successful over the years. Interesting. Karl thanks for the synopsis. Allison |
RE: very recent mite research
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| Thank-you miracle grow on again reassuring me on why I grow organicly |
RE: very recent mite research
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our neighbor next door has a older rose bush (4ftX4ft) that blooms all season long. (blooms size - 3.5" 25+ petals) they prune it, but, have NOT fertilized it or watered it in 25 years. it does just fine every season, blooms good, no disease problems, no major pest problems.
trees nearby shed there leaves in fall and they let them lay around the rose bush and that's it.
nature is taken care of that rose bush, just fine. |
RE: very recent mite research
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- Posted by jont1 Midwest 5b/6a (My Page) on
Wed, Nov 4, 09 at 2:38
My neighbor across the street planted a Peace bush at his house as a housewarming gift to his wife when they purchased it and moved in--ALMOST 40 YEARS AGO!!
He has never sprayed it for anything or fertilized it at all. All he has done is water it if it gets dry during the summer and snap off spent blooms throughout the year. I havenever seen any disease or insect problem on this bush.
To look at it you know it is obviously an older rose, but the blooms are more gorgeous than any modern Peace bloom you can produce.
Cloning a rose cultivar every generation for 65+ years as has been done takes a toll on the genetics of the bush and each generation gets just a tee-tiny bit "less" than the previous generation. But you don't notice it year to year because the changes are so minute. However if you were to compare a Peace rosebush from the 40's with a modern day one you can definitely see the results of all the declines through the generations cloned.
My neighbor was kind enough to let me send budwood to Steve Singer of Wisconsin Roses to propagate onto multiflora understock. The resulting four bushes are beautiful rosebushes. Big healthy bushes more disease resistant than my modern one and the flowers are no comparison. The colors are richer, the petals sturdier, and the fragrance though still light is stronger than the flowers from my modern bush.
Another friend took budwood from one of the four and grafted it to multiflora and got several nice bushes as well. He gave me one of those. So, the Mother bush is across the street and I have her daughter and granddaughter. It is really neat.
John |
RE: very recent mite research
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| Labelled doses of fertilizer are on the high end of the OK range. The manufacturer wants us to use their product generously. One-half the labelled dose might be a reasonable estimate of the lower end of the OK range. I wouldn't want to leave the impression that zero fertilizer is normally OK. The heavy pruning that most roses get removes nutrients from the system that eventually must be replaced. Some clay soils have reserves of potassium and phosphorus adequate to sustain growth for years-- a soil test might show that. Soils high in organic matter have moderate reserves of nitrogen that could be maintained through generous yearly mulching with yard waste. But generally nitrogen should be added each year. Sandy soils may not retain any nutrients to speak of and should get at least 1/2 labelled dose of complete fertilizer on a regular basis, or else manure, etc. I do have an old, large, once-blooming shrub that is able to grow and bloom well with no added fertilizer other than its own fallen leaves and stems. |
RE: very recent mite research
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| Another summary: http://www.lawnandlandscape.com/Article.aspx?article_id=81047 |
Here is a link that might be useful: link for above
RE: very recent mite research
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| Thanks for the bump, Henry. Perhaps because of the influence of gonzo exhibitors, a lot of how-to articles encourage fertilizing roses even beyond label recommendations. |
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