How Do Spider Mites on Roses Appear and How to Eliminate Them?

Abstract: Red spiders on roses are actually mites. They are named red spiders because they spin silk webs, but they have nothing to do with real spiders. This pest likes dry and hot environments, fears water and moisture, reproduces fast, has strong drug resistance, and is hard to be completely eliminated. Today, we at the Your Roses Network will introduce in detail how red spiders come and how to kill them.

Introduction of Red Spiders on Roses:

Mature female red spiders are usually oval – shaped, with colors of vermilion or iron – red, and there are block – shaped or strip – shaped dark – brown patterns on both sides of the back. Male red spiders are slightly rhombic and lighter in color, usually from light yellow to pink. Red spiders like dry and warm environments. The higher the temperature, the faster they reproduce. In the high – temperature summer, red spiders have extremely strong reproductive ability and can complete a life cycle in about 7 days.

Harm of Red Spiders on Roses:

Red spiders suck the juice of rose leaves, causing the leaves to turn yellow, fade, have spots, or even curl and fall off. In severe cases, the whole rose plant will be affected, and the ornamental value will be greatly reduced. They mainly move on rose leaves, especially the back of the leaves.

Infection Ways of Red Spiders on Roses:

Red spiders on roses can’t fly. They mainly crawl from the leaves of one rose plant to another and then reproduce. When we plant roses, don’t plant them too densely, which can also reduce the probability of red spider infection to some extent.

Elimination Methods of Red Spiders on Roses:

1. Spraying water: Red spiders have weak adhesion and are afraid of water. We can regularly spray the leaves of roses with a high – pressure water gun, especially the back, to wash down and drown red spiders.
2. Biological control: Introducing natural enemies such as predatory mites and ladybugs can effectively control the number of red spiders. Using some mineral oils can wrap red spiders and suffocate them, but this method has limited effect and is only suitable as an auxiliary means.
3. Chemical control: Spraying pesticides is the most effective way to eliminate red spiders. Use acaricides, such as Aikaman Damaling, Hongsha, Abamectin – Pyridaben, Bifenthrin – Spirotetramat, Bifenthrin – Etoxazole, etc.
   Mix the concentration according to the instructions. Generally, 1000 – fold dilution is recommended, and if necessary, it can be increased to 800 – fold dilution.
   When spraying pesticides, make sure that both the front and back of the leaves are covered, especially the back of the leaves where red spiders often gather.
   Pesticide control usually needs to be repeated several times, spraying once every 7 – 14 days until red spiders are completely eliminated.
   Red spiders have strong drug resistance. If they are not completely eliminated after 2 – 3 times of use, other types of acaricides are needed.