Oleander has an ingenious way to control rose powdery mildew
In spring, rose is easy to suffer from powdery mildew, and a layer of powdery mildew appears on the leaf surface after the disease, which seriously affects the normal growth and development of the plant. Oleander has a good effect on the control of rose powdery mildew.
The specific methods are:
1. Mash the fresh leaves of oleander, soak them in clear water for 2 days to prevent fermentation or deterioration, then filter the broken leaves with gauze and spray the remaining water on the diseased part of rose for 3 consecutive days, the effect is better. The diseased branches and leaves can also be directly soaked in the water made of oleander leaves for a while, and the effect is also better.
two。 When oleander is in full bloom, take its flowers and mash them into juice and rub them on the diseased branches and leaves of the rose.
3. The fallen flowers and fallen leaves of oleander are collected, retted and used as fertilizer and applied to the potted soil of Chinese rose, which can make the rose grow exuberantly and avoid powdery mildew.
4. Put the potted rose in the shade of oleander, or put the potted oleander in the rose flower, the rose will not have powdery mildew. Phyllostachys pubescens and peach leaves are highly toxic, so human and animal poisoning should be prevented.
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Oleander management
Oleander, also known as half a year red, willow peach, originated in Iran and India. Because it is evergreen without deciduous leaves, double flower fragrance, red, yellow and white, easy to breed, simple to manage, long florescence and generous crown, it is loved by people. Both the south and the north of our country can be cultivated, potted and planted on the ground. They are often planted in courtyards and flower beds, as well as Jizhi. But the management of oleander must pay attention to three points: it must be pruned at the right time. The top branch of oleander has the characteristic of one-third, which can be trimmed and shaped according to the need. Such as
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Propagation method of oleander
Mainly to cuttage, striping can also be done. 1. Cuttings were cut in Shangdian from late March to April every year. Strong 1-2-year-old branches were selected as cuttings, cut into segments of 15 cm long, immersed in 20 ℃ of water, and the depth of water was 1 × 3 of the length of cuttings. Change the water once a day. Seven days later, when the water wound turned white, it was taken out and inserted into the cuttings, and it was covered and moisturized, and it could take root in about 1 month. Or water insert from June to July. After taking root in January, it moved into the soil. 2. the striping is carried out in the rainy season and can take root after February.
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