What should I do if my Chinese roses have aphids?
A small tip for life: introducing a green plant maintenance experience for dealing with aphids on Chinese roses. The editor of this site will introduce it to everyone.
This year, plant diseases and pests are really rampant, which is a real headache for us who grow Chinese roses. In the past few days, Chinese roses have been blooming, especially the light-colored ones, it's easy to find small black insects hiding in the flowers. These insects are commonly known as thrips.
The damage caused by thrips in spring is relatively minor. In comparison, aphids cause more serious damage to Chinese roses in spring.
Common aphids are green, very small insects, which gather on the tender plants of Chinese roses to absorb sap, causing poor development of new branches and affecting the normal growth and flowering of Chinese roses.
Compared to green aphids, black aphids are more difficult to deal with. There was a potted hibiscus with dense black aphids on its tender plants. After applying imidacloprid, the next day, the aphids were still alive, which was really frustrating.
So what should we do when we encounter讨厌的 aphids or thrips to eliminate them completely?
Methods for controlling aphids and thrips
For common aphids, we only need to spray imidacloprid, which is an insecticide that can be absorbed by plants. The plant becomes toxic, and when insects eat the plant sap, they are poisoned and die.
Therefore, the efficacy of imidacloprid is relatively long-lasting. However, this type of systemic insecticide is not suitable for frequent use, as it can easily cause resistance.
What should I do if my Chinese roses have aphids?
Then the question arises, after spraying imidacloprid, there are still aphids and thrips. What should we do? The insects were not killed, and we can't continue to use imidacloprid, which is frustrating.
If you use imidacloprid once and find that the insects are still alive, there are two possibilities: one is that the concentration of the medicine is too low to kill the insects, and the other is that the insects have become resistant due to frequent use of this medicine, naturally, the effect is not good.
If you rarely use imidacloprid and find that the insects are not dead after spraying, you can spray again. If you use it frequently, you need to change the medicine at this time. We can switch to using dinotefuran to spray, which can also kill aphids and thrips.
If you, like the Green Plant Enthusiast website, encounter stubborn aphids in some potted plants, there's no need to worry. The Green Plant Enthusiast website will teach you a trick.
Prepare a bottle of aerosol insecticide, the kind sold in supermarkets for killing mosquitoes and flies. Spray it 50 cm away from the potted plant, give it a light spray, wait for 10 minutes, and then rinse with clean water to wash the aphid bodies clean and solve the problem.