1、 How to solve

There is mucus on the leaves of happiness tree, which indicates that it is an insect. It is likely to be a scale insect or aphid. At this time, it is necessary to find insects, remove them in time, remove the branches and leaves eroded by insects, and spray pesticides for control

2、 Pest control

1. Scale insect: it is one of the most common pests of happy tree, and it is harmful to a variety of plants. If the quantity is small, it can be removed manually and sprayed with garlic water or soot water to remove nymphs and larvae. Compared with pesticides, this method is non-toxic and harmless and will not relapse, but garlic has a large water vapor taste and needs to dissipate in about a week

2. Aphids: they are also common flower pests. They will suck the juice of plants and cause the leaves to turn yellow and soft. Because of its small size, it is not easy to find when the number is small, so it needs careful observation. To eliminate them, you can spray them with washing powder mixed with water or use biological control. Generally, ladybugs are better

3. Mites: most of them appear in high-temperature climate in summer, while there are less pests in humid environment. Therefore, it is necessary to move the plant to a ventilated place and spray water on the leaf surface to humidify it on time. In addition, pyridaben and nisolam can also be used for killing