Rose Red Spider
Do you know these? Some tips about roses and the rose red spider, keep reading!
Roses are increasingly favored by gardening enthusiasts, but the rose red spider can be a real headache. There are even cases where pesticides don't work. This article is about a gardening enthusiast's experience in preventing and treating rose red spiders, which is very valuable for reference.
Sometimes friends say that a certain pesticide doesn't work. It's not always the pesticide's fault, but sometimes it's due to improper use. The usual practice is to apply the pesticide once every 7 days for 2-3 times. However, many friends will spray again the next day if they still see pests, which actually doesn't enhance the effect of the pesticide but rather reduces it. Most insecticides nowadays are low-toxic and few are contact killers; they usually work by paralyzing the pest, making it unable to eat and eventually starve to death. Spraying the next day dilutes the pesticide with water, and doing this repeatedly can cause the pests to develop resistance, making the pesticide ineffective.
Red Spider: This pest is very small, less than 1 millimeter, round or oval, orange or reddish-brown. It's hard to detect due to its size, and by the time it's noticed, the damage to the plants is often quite severe. It pierces the leaves to suck the sap, destroying chlorophyll, causing grayish-yellow spots or patches on the leaves, which may turn yellow, fall off, or even be stripped bare. This pest prefers high temperatures and dry conditions, so it reproduces rapidly and causes severe damage in hot and dry weather. They often gather on the back of the leaves, spinning webs to cause harm. The spread of red spiders relies on their own movement as well as wind, rain, and human activities. To prevent and control the damage caused by red spiders, one should pay attention to the leaves and check the back if any discoloration is noticed. If only a few leaves are affected, remove the infested leaves; if more leaves are affected, spray the pesticide early. Irregularly discolored areas on the leaves are likely caused by red spiders. Seeing spider webs means it's already at an outbreak, and white powder indicates that the pests have multiplied many times.
Recommended Pesticides: I will补充 more details when I have time, but here's the special note on red spider treatment: broad-spectrum insecticides are not effective and can only provide temporary relief, and red spiders easily develop resistance. It's recommended to use one type of pesticide for the first occurrence and another type for the second, alternating every 7 days for 2-3 times. Make sure to spray both the plant and the soil, as the eggs are in the soil.
Abamectin can kill red spider eggs but is ineffective against adult pests. Therefore, good pesticides contain abamectin along with other ingredients. Older pesticides include Abamectin Dimilin and Abamectin Propargite; new drugs include Hailir's Anilang and Miankuai. **The drug recommended is Mianwei (there are many counterfeits in the domestic market, so it's best not to buy from TB, and instead buy from provincial or municipal Bayer (D-L)). These are all low-toxic and kill both eggs and pests. It's best to choose two types to alternate and prefer smaller packages, as large packages are impractical for home use.
This article shares a comprehensive method for dealing with rose red spiders (experience in prevention and treatment) and hopes to provide a reference to solve your green plant problems.