what to use for black spot on roses?
1443742
Once black spot occurs on the leaves the plant is already infected for the season. Very difficult to do anything about it. Best advise is to use a systemic fungicide at the start of the season as well as the fungicide powders on early growth and remove all dead canes and any debris around the rose bush at the start of the season. Also do not use unclean pruners between other rose bushes during the season. Wash with the pruners with alcohol before each and every pruning episode. Essentially once it starts its very hard to stop it. Usually it does not effect flowering though. It just ends up defoliating the plant and the fungus progresses. Once black spot occurs on the leaves the plant is already infected for the season. Very difficult to do anything about it. Best advise is to use a systemic fungicide at the start of the season as well as the fungicide powders on early growth and remove all dead canes and any debris around the rose bush at the start of the season. Also do not use unclean pruners between other rose bushes during the season. Wash with the pruners with alcohol before each and every pruning episode. Essentially once it starts its very hard to stop it. Usually it does not effect flowering though. It just ends up... » Read More Once black spot occurs on the leaves the plant is already infected for the season. Very difficult to do anything about it. Best advise is to use a systemic fungicide at the start of the season as well as the fungicide powders on early growth and remove all dead canes and any debris around the rose bush at the start of the season. Also do not use unclean pruners between other rose bushes during the season. Wash with the pruners with alcohol before each and every pruning episode. Essentially once it starts its very hard to stop it. Usually it does not effect flowering though. It just ends up defoliating the plant and the fungus progresses. « Show Less
1443743
You need to use a fungicide (available at any garden supply store or Nursery) that you spray on the rose bush before the humid weather sets in. Repeat application every 2 - 4 weeks as conditions dictate.
1443744
not sure but my dad said if you get a branch an there is a dark blk spot in the center of cut it means it has some of wevel sorry I couldn't help more but I have used Bayer 701100a systemic for years and had great luck
1443745
Black spot on roses are a fungus. In the fall cut the roses back and dump the cuttings and leaves around the plants, don't compost. Get a liquid rose anti-fungal and spray after each rain fall
89075
Actually, the little devils are a terror. I borough some potted plants in from the greenhouse and with in a week or so...they had exploded! if, your gnats are inside on your plants, change and re-pot your plants new pots and all, wash the plant it's self with an insecticide soap, leave them to their self, as you will need to watch and re spray again, till your sure that you have captured the little ones. As for your question...Spectracide Triazcide is a stronger chemical for out door use, lawns and scrubs...I used it for my entire back gardens, NOTE keep children, frogs, fish from exposure. A very fine mist with an extended wand so that you can get upper and lower leaves, kills, molds, grubs, ants, just about everything that crawls, again as this needs several applications, as the bugs are happy making new ones, I only needed 2 applications, Also, I had a brown spot and kept growing, no animals either, I sprayed a very fine mist on the spot and within a week or so, it is gone and not returned. a fungus? I assume. Hope this helps you, any questions just ask. Brenda
1819734
Don't dilute. Dab on dark spots with a Q-tip, then apply moisturizer over the whole area.
1992945
I doubt it, this is a pesticide and it sounds like you have a different problem to deal with. Try googling: "black spots on tomato plants". You should be able to find some help there. Good luck!
2082115
Yes this is what I use on my roses but I use half strength though, use once a month for in ground plants and every two weeks for potted plants. FYI: MG reformulated Bloom Booster in 2014, it's now 15-30-15. Rose experts recommend a NPK ratio of 1:2:1.
1127123
There are no quick fixes I know of yet. Peels help. This works about as well as any, although all take a lot of time as spots keep coming up. Use consistently and it takes way more than one tube. Sun damage is the hardest to fade. Brown spots tend to fade slightly faster than the red sun damage.
355060
I suggest doing a ph test of the soil before anything, maybe this product at 5 week intervals instead of 6, and perhaps some good fish liquid fertilizer too. Roses are heavy feeders so make sure that when you plant, you amend the soil with good compost and well aged manure. Getting them planted and off to a good start with amended soil at the very beginning is key. Different types of soils, different zone s, different weather conditions, lots of things to consider, but the best soil at the very start, amended, makes the best roses.
1188372
Just remember that when applying this to your roses you will kill any honey bees or other beneficial pollinators. This german made product is not available in germany or europe because of its toxicity. I would look at organic alternative. Good luck to you
43796
It can be applied to Indian hawthorn shrubs, but it is very difficult to control Entomosporium (the most common type of leaf spot that affects these shrubs) with fungicides if that is your problem.
2008559
I have never used it on Roses. I have sprayed gardenias, azaleas, vegetables and purselane (spanish moss). It is permethrin based, you might have to research to find that out. This product is oil based - but mixes with water - so it might damage the flower - not the leaf. There are water based (powder based) permethrin products on the market since they are water based, they should not damage the petals, but again I would check with a rose expert.
1759013
I use mine for sugar paste; I've never had issue with black marks. Where by chance you using black clay prior..It might need to be cleaned.
942458
Yes! But you have to follow the directions to the letter as to when to apply and how often. Too much and you can do more harm than good. Too little and will not be effective. Stay away from the ones that Bayer sells. They will kill your roses based on my experience.
1030292
I think these would wear out fairly quick on rose cane. Work great on other plants though.
128732
I have many dark spots on my arms, and have found that Alpha Hydroxy nor Glycolic work well for dark spots. Better to look for a cream with Kojic acid/Licorice. Be carefull about putting anything on your lips, as it would be easy to ingest.
32113
I can't say for certain but I went to Marshall's and bought a vase. Trust me they are as large as they appear so an ordinary vase will not work as you will need to cut them as well. Largest roses as I've ever seen.
1324313
You can use this soil for desert rose plants. They prefer good drainage so you might want to mix in a little more sand into the soil to make the mix coarser so that it will drain faster.
799980
None. Take a WET rag, hydrogen peroxide, and an iron. YouTube it. 1. Pour the peroxide into stain. 2. Put wet rag over 3. Put iron on high WITH STEAM on top of rag (just set it) for 10-30 seconds 4. Blot off- works on tons of stuff! Better for you than simple green nasty stuff too, and works better too!