Roses = medicine jars? Master these 5 tips and you're guaranteed blooms every month with no pests!
Powdery mildew
Powdery mildew can be said to be the disease rose growers fear most, as it both affects the beauty of the roses and hinders their normal growth.
Symptoms of powdery mildew
In the early stage, there are a few fine white particles on the leaves, then the white particles gradually gather into a layer of white powdery substance. In severe cases, the entire leaf, branches and buds are covered with white powder.
Preventive measures
Powdery mildew mainly occurs in spring and autumn; dryness and poor ventilation can both cause powdery mildew. So when planting roses, do not plant them too densely. For those outdoors receiving direct sunlight, spray water around the plants often to maintain humidity.
Treatment methods
Mix Fenxiuke with water at a ratio of 1:1500 and spray the whole plant. A small amount of chlorothalonil can be added to the solution as supplementary prevention.
Black spot disease
Roses have almost no resistance to black spot disease; almost all roses will get black spot, making it the "number one scourge"!
Symptoms of black spot disease
It starts as small brown spots, gradually developing into large dark brown patches. In severe cases, it causes leaves to yellow, fall off, and even results in bare branches!
Preventive measures
Black spot disease is mainly caused by high temperature and rainy weather, so prevention should be done well during the rainy season. After rain, spray fungicide immediately and promptly remove diseased leaves to prevent spread.
Treatment methods
1. Spraying
Mix 10 ml of Amimiao Shou agent with 15 L of water. Spray evenly, and also spray the undersides of leaves and the diseased parts of stems.
2. Watering
After roses become diseased, pay extra attention when watering. It is best to water the soil along the edge of the pot and avoid getting water on the leaves as much as possible. Keep the roses well ventilated and prune appropriately to maintain light penetration.
Root nodule disease
Ground-planted roses are especially prone to root nodule disease. Grafted roses have a much higher chance of getting this disease than cutting-grown roses, and root nodule disease is extremely contagious.
Preventive measures:
Before planting roses, first mix K84 with 3 times its volume of water and dip the roots, which helps suppress the occurrence of root nodule disease.
Treatment methods:
If the root nodules are not severe, you can use a sterilized small knife to cut off the tumors down to the woody part, then apply potassium permanganate to the wounds. If it is too severe, it is best to discard the plant and disinfect the soil.
Spider mites
Spider mites are probably the most headache-inducing pest for rose growers. Not only roses, but spider mites are also a pest that most flowers are prone to attracting.
Damage caused by spider mites
The environment where spider mites flourish is mainly high temperature, dryness and poor ventilation. Spider mites cause yellow patches on leaves, and the leaves wither and yellow until they fall off.
Solutions for spider mites
Mix avermectin agent with water and spray once every 3 days, for 3 consecutive times. Be careful to spray the undersides of leaves too. In severe cases, spray once every 2 days.
Aphids
Aphids should also be quite familiar to flower lovers. Every spring they suffer from aphids, and it is unbearable!
Damage caused by aphids
Aphids mostly occur in the dry, rain-scarce early spring season, causing abnormal development of rose leaves and buds, sucking the sap of the roses, slowing their growth, and even triggering other diseases.
Solutions for aphids
When there are not many aphids, you can pinch them to death directly with your hands. If there is a large outbreak, you can spray with imidacloprid.
Have your roses ever had these diseases?
Do you have any unique solutions?
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