What medication to use for rose red spiders
If you want to learn about the small knowledge of roses and Chinese roses, what medication to use for rose red spiders, the following article will introduce for netizens.
Chinese roses are famous for being prone to diseases, and red spiders are the most common pest. Many gardening enthusiasts hope to know what medication to use for rose red spiders. This article introduces various pesticides because different medications need to be used in rotation, and each can only be used once within three months, otherwise it will affect the efficacy. Therefore, it is best to have more than one type of pesticide.
When preventing and treating with pesticides, one should first consider the toxicity of the pesticide to humans and its impact on the environment, and it is recommended to use low-toxicity and high-efficiency pesticides. High efficiency includes two meanings: one is good killing effect, and the other is long-lasting effect. I generally choose varieties with a lasting period of over 40 days. Low-toxicity and high-efficiency pesticides are indeed more expensive in terms of unit price, but after analysis, I think it is acceptable:
1. These pesticides are generally diluted over 5000 times, while other pesticides, such as the commonly used abamectin, are diluted 1000 times.
2. The efficacy lasts for 45 days or more, while abamectin and other general pesticides have an efficacy of 7 days.
When spraying, make sure to spray the back of the leaves effectively, as red spiders mainly reside on the back of the leaves. When purchasing plants prone to red spiders, such as Chinese roses, especially young seedlings, it is best to prepare the medication in advance.
1) Mitac
This is the first low-toxicity and high-efficiency pesticide I used. The smallest dose is 100 milliliters, which was priced at over 60 at the time and is now around 40. I have already used up to the third bottle, and each time I didn't finish it before it expired, but I think it offers good value for money compared to the following pesticides.
Produced by Bayer Crop Science, the actual active ingredient is spirodiclofen. It comes in a 100-milliliter suspension. Target pests: various mites, including common red and white spiders. It mainly prevents eggs, nymphs, and female adults (not effective on male adults) through contact and stomach poison. Use diluted 4000-6000 times.
Product features:
1. Broad-spectrum miticide.
2. Long-lasting period, up to 35-45 days. I usually switch to another drug at around 40 days for the next stage of control.
3. The miticidal mechanism is to inhibit the synthesis of fatty acids in the pest's body, disrupting the energy metabolism of the pest, thereby killing the mites. This is different from the mechanism of commonly used neurotoxic miticides, so there is no risk of cross-resistance to existing miticides.
4. Safe for crops, very safe under different temperatures.
5. Lipophilic, resistant to rain wash-off. Normally, rain within 3 hours after spraying does not affect the normal functioning of the pesticide.
6. Low toxicity, relatively safe for humans and the natural environment.
2) Ecarta
My experience is that the efficacy is similar to Mitac, and it is a first-class low-toxicity miticide. The active ingredient is 43% bifenthrin suspension, currently sold in 5-milliliter bags, with a dilution ratio of 3000-5000 times, produced by United Phosphorus Inc.
Ecarta is effective against all life stages of mites, killing eggs and adults, which is its advantage over other low-toxicity and high-efficiency miticides. Long-lasting, with an efficacy period of about 14 days at 25 degrees Celsius and up to 40 days at temperatures above 25 degrees Celsius. Since red spiders mainly occur above 25 degrees Celsius, I find it effective within 40 days.
3) Lailu Z乙螨唑
The active ingredient is 11% etoxazole, in the form of a suspension. Available in two packaging options: 10-milliliter bags and 100-milliliter bottles, priced at around 7 yuan and over 50 yuan respectively.
The manufacturer of etoxazole is Sumitomo Chemical Company. This pesticide has good efficacy against various forms of young and nymphal mites, is resistant to rain wash-off, and has a lasting period of 50 days. However, I usually reapply around the 40th day. It has minimal impact on beneficial organisms and is safe for crops. Use diluted 5000-7500 times, so the cost-effectiveness is very high.
Like Mitac, it should be used at the beginning of the peak period of young nymphs of red spiders. If the red spiders are severe, it should be used in combination with a pesticide that has adult-killing properties.
4) Abamectin
I won't post a picture of abamectin, as it is already produced domestically by several manufacturers, and products from well-known brands work well.
This is a broad-spectrum insecticide and miticide. Although it has a strong odor, it is indeed a low-toxicity pesticide with reliable and effective efficacy against red spiders and other pests, usually diluted 1000 times. Abamectin has stomach poison and contact poison effects on mites and insects, so it cannot kill eggs.
I have been using abamectin, but mainly not for killing red spiders because compared to the above three, the lasting period of abamectin is only one week. My mainstay for controlling red spiders is the above three. I generally use abamectin to kill aphids, thrips, diamondback moths, caterpillars, whiteflies, etc. In terms of broad-spectrum and low price, abamectin is considered a miraculous drug.
When red spiders爆发 severely, abamectin combined with one of the above three has excellent killing effects. If the plants are not red spider-prone ones like Chinese roses, abamectin is a good choice, and usually two sprays can solve the problem.
5) Jinmanzhi
The active ingredient is 20% flufenazole suspension, developed by Daiso Chemical Company in Japan. It is effective against the eggs, nymphs, and adults of leaf mites. It does not harm various plants and is low-toxic to mammals, aquatic organisms, beneficial organisms, and natural enemies. Use diluted 1500-2500 times, with a lasting period of over 30 days. Available in 10-milliliter bags and 100-milliliter bottles, priced at 5-6 yuan and over 40 yuan respectively.
I find its dilution ratio is around 2000 and the lasting period is 15 days shorter than that of Mitac, Ecarta, and etoxazole, so the cost-effectiveness is not as good as the first three, mainly because it increases the frequency of spraying, which I don't like, so I use it less.
It is reported that Jinmanzhi is also effective against small diamondback moths, aphids, powdery mildew, and downy mildew.
6) Huhuashen
I also started using pesticides with Huhuashen, and many gardening enthusiasts are still using it, as it is indeed effective against red spiders, so I will also discuss Huhuashen.
Huhuashen does not specify the active ingredient, but from its strong odor, I suspect it contains abamectin, which can also be used to kill pests that abamectin can kill, but it also has fungicidal properties and should be a compound preparation.
From the perspective of safety, I have long since stopped using Huhuashen. It's best not to use drugs with unknown ingredients. Moreover, its dilution ratio is 200 times, and its price-to-performance ratio is also relatively low, making it less desirable than abamectin. As for the lasting period, my previous experience was about one week.
The above is a detailed explanation of what medication to use for rose red spiders, for reference and suggestion only!