Will aspirin deter rose rosette mites from feeding?
henry_kuska
5 years ago
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lkayetwvz5
5 years agorifis (zone 6b-7a NJ)
5 years agoRelated Discussions
What attract insects (rose slugs, aphids, mites) to plants?
Comments (22)Khalid wrote in another thread: "Then I stopped spraying even any organic matter. I gave more calcium to my roses which made the soft branches and leaves harder thus making it relatively unattractive for the pests. This reduced the affected bushes / leaves to a good extent." Agree with Khalid, folks in rainy climate lime their soil, either in late fall or early spring, depending on how many inches of rain they get. Rain is acidic at pH 5.6, as the pH drops, less calcium and potassium are available. The best lime to use is Espoma Garden Lime (sold at Walmart for $10 per 5 lb.). It has 20% calcium and 10% magnesium ... both are essential in keeping leaves thick so pests cannot invade. From the above chart, around pH 5.6 (rain water), less molybdenum, less magnesium, less calcium are available. Next nutrients that are less: phosphorus, potassium, and nitrogen. I already posted in Organic Rose my experiment that I did with 2 identical Thai basil: I lowered the pH of one with acidic cracked corn (pH 4), plus gypsum (17% sulfur) .. that Thai basil' leaves became pale, plus THINNER due to less calcium and magnesium available. Then I saw blackspots on a Thai basil for the 1st time !! The other basil I planted in my alkaline clay (pH near 8), and it's twice taller plus really thick & glossy leaves (more available nitrogen, potassium, sulfur, calcium, and magnesium). But leaves were just a bit pale due to less iron at high pH, so I gave it blood meal, has chelated iron, and leaves became dark green. I once planted a bok-choy vegetable next to my patio with a limestone base, so the soil is very alkaline, pH 8. The leaves were dark-green, but its so tough that I boiled it for one hour, and it's STILL so fibrous that my teeth can't handle, let alone some tiny pests like aphids, rose slugs, or midge. Rose slugs (sawfly larvae) are very rare in my alkaline clay, unless I lower the pH with my experiments: Put acidic cracked corn (pH 4) in potting soil, and roses got rose-slugs from THINNER LEAVES in acidic rain (calcium, magnesium, and potassium drops when pH drops). Mirandy rose got a big-fat rose-slug on it for the 1st time. Why? It's next to a tree, and the tree robs the soil of calcium, magnesium, and potassium. Plus tree roots secret acid, so the soil became even more acidic with rain (pH of rain is 5.6). Used molasses, plus vinegar, plus sulfate of potash (21% sulfur), plus gypsum (17% sulfur) ... such acidic solution made leaves thinner, plus the stinky molasses really attract sawfly which give birth to rose-slugs. CONCLUSION: The best solution for pests is to raise soil pH by using dolomitic lime such as Espoma Garden lime (20% calcium and 10% magnesium). My soil is dolomitic clay, so I don't have midge, rose-slugs (sawfly larvae), nor aphids, unless I use acidic fertilizer. When there's tons of acidic rain, I throw pea-gravel on top of roses that like it alkaline, pea-gravel has many alkaline minerals to make leaves thick, glossy, and to prevent pests....See MoreConfirmed cases of Rose Rosette Disease in my DFW area roses
Comments (18)I'm new to roses (planted my first rose garden in 2011) and, thus far, they're all healthy, but I do read a lot and want to be educated and ready to remove plants if it becomes necessary. I saw my first RRD rose at my local independent nursery a few days ago. A landscaper had brought in a branch and blooms. The horticulturist on staff at the nursery was kind enough to gather a few of us around and point out what to look for. In all honesty, it looked really different in person than what I had here-to-then seen online and read in descriptions of the virus. It was really helpful to see the "witch's broom"-like growth, the blooms that looked like it was grown at a leaking nuclear plant, and the weird thorniness that were like thorn-hair. This particular afflicted plant was off a Knockout variety but I know it can affect all roses, so I'm watching everything at my house, praying that I don't have to "euthanize" any. Pretty scary. Wish there was something we could do to avoid it. Makes you feel so helpless. . ....See MoreWettable sulfur spray helps against eriophyid mites (rose rosette viru
Comments (9)Title: " Effect of eriophyid mite Aculops lycopersici Massee (Acarina: Eriophyidae) on tomato."" Badly infested fields may lose up to one-half of the crop where no control measures are applied, and when the crop is attacked at an early stage total loss may occur. Early detection of the mite is necessary for control, and dicofol, micronised sulphur, quinomethionate and dimethoate have been found to be effective against it." "http://www.cabdirect.org/abstracts/19780557118.html;jsessionid=C2147CA8C76F6B1F8D2BE8E825E747B2 --------------------------------------------------------------------------------------------------- "Control None of the acaricides tested in the laboratory or in five field studies (in San Diego. Orange, and Ventura counties) seemed to give more than six to eight weeks’ control when applied during the worst broad mite period (July and Au- gust) (table 2). This may be due to the lack of residue on new (post-spray) growth where the broad mite prefers to feed. Many contact pesticides work well on this mite, but residual activity is also necessary, because no material exam- ined has been effective against eggs. Sulfur and oxythioquinox (Morestan) have given consistently good control of the broad mite. Sulfur is also effective against the citrus rust mite; oxythio- quinox controls citrus red mite Panony- chus citri (McGregor) and is fairly effec- tive against citrus rust mite" http://ucce.ucdavis.edu/files/repositoryfiles/ca3707p21-72310.pdf ----------------------------------------------------------------------------------------------------...See MoreKnockout Roses--is this Rose Rosette Disease?
Comments (17)Sorry for the delayed response. It has been a very hectic past few days! Dumb question. Is RRD contagious? Meaning if I try the wait and see approach (by removing only the impacted canes instead of digging up the whole plant) with the roses who don't seem to have it as bad yet.....will I take a risk that somehow the RRD could get transmitted to the roses who don't have it? I would hate to lose any of the seemingly healthy roses by doing this. Moving forward, is there anything I can do to lessen the chances of the roses getting RRD? This summer Japanese beetles have been widespread in this area. Honestly, I can't ever remember them being this bad before now...or ever even seeing them really. I know of several other people who have knockout roses here and everyone is having the same problem with the Japanese beetles feasting on them. So as bad as it may sound, I can take some solace in knowing it is not just my roses that are getting hit. Is there anything I can spray on the roses to prevent Japanese beetles from attacking them?...See Morehenry_kuska
5 years agoBenT (NorCal 9B Sunset 14)
5 years agohenry_kuska
5 years agorifis (zone 6b-7a NJ)
5 years agohenry_kuska
5 years ago
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