Be cautious of these tiny insects, which can bring devastating damage to your roses.
Article摘要: Be cautious of these tiny insects that can bring devastating damage to your roses, sharing the related experience of flower planting, followed by detailed content.
This is the 840th day of original articles.
This article is one of the original theories.
Excerpt from the "Three-step Method of Rose Cultivation" series.
In yesterday's article, I shared the prevention and treatment of common rose diseases, and today I continue to talk about the pest control of roses.
Now the most common pest in roses is aphids.
What are aphids?
To kill insects accurately, you first need to recognize the insects. What are aphids? Aphids are also known as腻虫(honeydew insects) or蜜虫(honey insects), and they are among the most destructive pests in the world.
Aphids reproduce very quickly, with the ability to produce 10-30 generations in a year. When the average temperature is above 12℃ for 5 days, aphids begin to breed.
In early spring and late autumn when temperatures are lower, it takes about 10 days to complete one generation of breeding, but in the warm summer, it only takes 4-5 days. Therefore, treatment must be quick, accurate, and decisive.
Aphids mainly harm the tender shoots and flower buds of roses by absorbing plant juices. Aphids not only hinder the growth of roses but may also form gall and spread viruses, causing deformation of flowers, leaves, and buds.
How to distinguish aphids?
Aphids are relatively easy to distinguish, usually concentrated in the tender shoots and flower buds of roses.
The common aphids are green, while some are gray or black, and yellow and red are rare.
The aphid family is also very large, with about 200 species that are destructive, and there's no need for us to recognize them all.
No matter the color of the aphids, when we find dense small insects on the tender branches or flower buds of roses, which are mostly stationary and similar in shape to common aphids, we might as well treat them as aphids first.
Control methods for aphids in roses:
The control of aphids is relatively simple. If you are growing roses on a balcony at home and find a small number of aphids, you can manually capture them. Then, tilt the pot under the tap and rinse the rose branches.
Chemical control:
Aphid chemical control can be carried out by spraying with pymetrozine, and 1-2 sprays can manage the infestation.
Physical control:
Friends who are not convenient to use chemicals can try to make their own insecticides. The specific methods are as follows:
1. Configure pepper water in a 1:6 ratio and spray it on the whole plant. 2. Configure laundry powder water in a 1:20 ratio and spray it. After killing the insects, remember to rinse the leaves with clean water. 3. Configure a solution with laundry: urea: water in a ratio of 1:20:400 and spray it.
Note: Homemade insecticides should be sprayed 2-3 times continuously to achieve better therapeutic effects.
Do you know if your roses have been threatened by aphids recently? Be sure to observe more in spring, detect and treat early. If you find signs of aphids, you might as well try the treatment methods mentioned above.
Of course, besides aphids, there are many other rose pests. When growing roses in a closed balcony, red spiders are most likely to occur.
The above [] introduces the content related to being cautious of these tiny insects that can bring devastating damage to your roses, hoping it is helpful to you!