Symptoms: This fungal disease can affect various parts of the plant, including leaves, branches, pedicels, buds, flower buds, and young shoots. In the early stages of infection, a white powdery coating appears on the infected areas—this is the asexual spores (conidia) of the pathogen. As the disease progresses, this white layer turns pale gray, and small black specks may appear on the affected leaves or shoots. These black particles are the sexual structures (cleistothecia) of the fungus. Infected plants often show stunted growth, with uneven or curled leaves, malformed shoots, and poor flowering. Severe infections can lead to small, shriveled flowers, leaf drop, and even plant death, significantly reducing ornamental value. Common types of flower powdery mildew include rose powdery mildew, chrysanthemum powdery mildew, and greenhouse powdery mildew.
Disease Occurrence: The pathogen survives the winter in the form of mycelium or conidia on infected plant tissues and buds. In early spring, wind and rain carry the spores to healthy leaves and shoots, initiating new infections. Throughout the growing season, repeated infections can occur, with peak disease activity typically between April to June and again from September to October. Factors such as high temperatures, excessive nitrogen fertilizer use, overcrowded planting, lack of sunlight, and poor air circulation can promote disease development. Different plant varieties also show varying levels of resistance to the infection.
Control Methods: 1. Prune infected branches and leaves early in the spring, and dispose of them by burning to prevent further spread. 2. Increase the application of phosphorus and potassium fertilizers while limiting nitrogen to reduce susceptibility. 3. During the early stages of infection, apply 50% carbendazim wettable powder at a rate of 800–1000 times dilution, or 70% thiophanate-methyl at 1000 times dilution. Before bud break, spray a 3–4 degree solution of lime sulfur or a Bordeaux mixture (1:2:100–200) to provide preventive protection.
Additional Tips: Monitoring plants regularly for early signs of infection is crucial. Good garden hygiene, proper spacing, and adequate sunlight can go a long way in preventing outbreaks. If you're unsure about the exact type of powdery mildew affecting your plants, consider sending a sample to a local extension service for accurate diagnosis and tailored advice.
Dynamic disinfection is a process of disinfection and cleaning of air and surfaces in indoor Spaces. A
new method of safe disinfection that does not cause harm or interference to people and the environment on
site.The charged particles and active oxygen components produced by the low-temperature plasma in the
equipment play a major role in the process of killing bacteria and viruses, and have the effect of
broad-spectrum sterilization. It can not only inactivate aerosol plankton in the air and bacteria
and viruses on the surface of object but also effectively decompose formaldehyde and volatile organic
compounds, degrade all kinds of bad smell and purify it Air environment.A small amount of high purity
zone.
Air purifiers, also known as "air cleaners", air purifiers, and purifiers, refer to decoration pollution that can absorb, decompose or convert various air pollutants (generally including PM2.5, dust, pollen, odor, formaldehyde, etc. , bacteria, allergens, etc.), household appliances that effectively improve air cleanliness, are mainly divided into household, commercial, industrial, and building.
There are many different technologies and media in air purifiers that enable it to provide clean and safe air to the user. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalyst technology, superstructured photomineralization technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, etc.; material technologies mainly include: photocatalyst, activated carbon, Carbon core filter technology, synthetic fibers, HEAP high-efficiency materials, negative ion generators, etc. Most of the existing air purifiers are composite types, that is, a variety of purification technologies and material media are used at the same time.
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