Method for Handling Powdery Mildew on Potted Miniature Roses
If you want to know about the related green plant content for handling powdery mildew on potted miniature roses, the editor will introduce it next.
Method for Handling Powdery Mildew on Potted Miniature Roses
It has been continuously rainy these days, and the air humidity is particularly high. Many flower enthusiasts must have encountered this problem: many white powdery substances have appeared on the rose buds.
This is actually the most typical powdery mildew. Powdery mildew is particularly prone to occur when the air humidity is high and can be difficult to treat.
Miniature roses now are mostly in the bud formation stage or color showing stage. If they contract powdery mildew and are not treated in time, it will have a significant impact on the opening of the buds.
Generally, when powdery mildew occurs on miniature roses, we cut off the infected part to prevent the transmission source. However, if it occurs on the buds, it's hard to cut off so many rose buds. What should we do then?
Method for Handling Powdery Mildew on Potted Miniature Roses
When powdery mildew occurs on the leaves, the best choice is to cut the leaves directly and then spray with medicine. However, when it occurs on the buds, cutting off so many buds is really a pity, but we actually have a better solution.
This kind of powdery mildew is mainly distributed at the base of the bud. We can wipe it with alcohol or vinegar solution to kill the germs.
Dilute alcohol or vinegar 150 times, dip a large cotton swab in it, and repeatedly wipe the infected area to remove the powdery substance. Both alcohol and vinegar have good antibacterial effects. Here, it is important to note the dilution ratio of alcohol and vinegar. If wiping the leaves, we can dilute it 100 times, but we need to be more careful with the buds, as our goal is not only to treat powdery mildew but also to ensure that the buds open normally.
It is recommended to dilute it 150 times first, observe the effect after wiping, and if there is no burn, continue using this dilution. If there is a burn, you need to increase the dilution ratio because the maturity of the branches varies, and their tolerance will differ.
If the effect is not significant after wiping, try diluting it 100 times again, or even 50 times. The smaller the dilution ratio, the better the antibacterial effect, but the risk of burning may also increase. Therefore, start with a higher dilution ratio.
Just wiping is not enough. After wiping the obvious disease areas, you should also spray the whole plant because some parts may have been infected with powdery mildew but show no obvious symptoms. Spraying alcohol or vinegar solution can effectively inhibit the growth and reproduction of the germs.
As long as you persist in wiping and spraying 1-2 times a day, powdery mildew can be better controlled, with no obvious coverage of powdery mildew germs. The rose buds can develop and bloom normally. As the flowers bloom and the temperature rises, powdery mildew will gradually disappear.
Of course, for potted miniature roses, we can use this method to manage them. If the roses planted in the ground are widely infected with powdery mildew, we still need to persist in spraying medicine. We can use fungicides like myclobutanil or pyraclostrobin to spray and manage, and if the effect is not good, we can also use lime sulfur solution diluted to 1500 times to spray, which has a more obvious effect and is less likely to cause phytotoxicity.
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