Is the rose just a medicine jar? Learn these 5 tips and you're guaranteed blooms every month without attracting pests
Roses have large flowers and a rich fragrance, and many flower lovers are captivated by them. But anyone who has grown roses probably knows that roses are practically a "medicine jar" - developing this disease and that disease every few days, and attracting a few pests from time to time. Today, Huahua will introduce the diseases roses are prone to, and how to solve them.
Powdery mildew
Complete Guide to Flower Growing
Powdery mildew can be said to be the disease rose growers fear most, as it not only affects the beauty of the rose but also hinders its normal growth.
Symptoms of powdery mildew
In the early stage, there are a few tiny 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 flower 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 kept outdoors in direct sunlight, spray water around the plants frequently to maintain humidity.
Treatment methods
Mix fenarimol 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 an auxiliary preventive.
Black spot disease
Complete Guide to Flower Growing
Roses have almost no resistance to black spot disease; nearly all roses will get black spot, making it truly 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 the leaves to turn yellow and fall off, or even results in bare branches!
Preventive measures
Black spot disease is mainly caused by hot, rainy weather, so prevention should be done well during the rainy season. Spray fungicide immediately after rain, and promptly remove diseased leaves to prevent spread.
Treatment methods
1. Spraying
Mix 10 ml of Amimiao Shou (azoxystrobin + difenoconazole) with 15 L of water. Spray evenly, and also spray the undersides of the leaves and the affected parts of the stems.
2. Watering
After the rose becomes diseased, take extra care when watering. It is best to water the soil along the edge of the pot, avoiding water on the leaves as much as possible. Keep the rose well ventilated and prune appropriately to maintain light penetration.
Root knot disease
Complete Guide to Flower Growing
Ground-planted roses are especially prone to root knot disease. Grafted roses have a much higher chance of getting this disease than cutting-propagated roses, and root knot disease is extremely contagious.
Preventive measures:
Before planting roses, first dilute K84 with 3 times its amount of water and dip the roots, which helps suppress the occurrence of root knot disease.
Treatment methods:
If the root knots are not severe, you can use a sterilized knife to cut off the tumors, cutting down to the woody part, then apply potassium permanganate to the wound. If it is too severe, it is best to discard the plant and sterilize the soil.
Red spider mite
Complete Guide to Flower Growing
Red spider mite is probably the pest that gives rose growers the biggest headache. It is not only roses - red spider mite is a pest that most flowers are prone to attracting.
Damage caused by red spider mite
The environment in which red spider mites flourish is mainly high temperature, dryness and poor ventilation. Red spider mites cause yellow patches on the leaves, and the leaves wither and yellow until they fall off.
Solutions for red spider mite
Mix abamectin with water and spray once every 3 days, for 3 consecutive times. Be careful to spray the undersides of the leaves too. In severe cases, spray once every 2 days.
Aphids
Complete Guide to Flower Growing
Aphids should also be quite familiar to flower lovers. Every spring they suffer from aphid torment, and it is unbearable!
Damage caused by aphids
Aphids mostly occur in the dry, rain-scarce early spring season. They cause abnormal development of rose leaves and flower buds, suck the sap of the rose, slow its growth, and can even trigger other diseases.
Solutions for aphids
When there are not many aphids, you can crush them directly with your hands. If there is a large outbreak, you can spray with imidacloprid.
Have your roses ever had these diseases?
What are your unique solutions?
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