Rose is beautiful, but it's not so easy to raise rose. Some flower friends even call it medicine jar, and red spider is the insect pest that often patronizes rose. The key point is that red spider is extremely difficult to kill. Many flower friends are driven crazy by red spider, so they want to know what medicine is the most effective to kill red spider. This paper introduces a variety of drugs, and these drugs need to take turns Only when used can it be effective. Each medicine can only be used once in three months, otherwise it will make red spider or other insects resistant, so we must not use only one medicine.
What is the most effective drug to control red spider? We should first consider the toxicity of drugs to the human body and the impact on the environment. It is suggested that low toxicity and high efficiency drugs should be used as far as possible.
The so-called high efficiency refers to: first, good killing effect; second, long lasting effect; I generally choose the varieties with a duration of more than 40 days. The drugs with low toxicity and high efficiency are really expensive in terms of unit price, but it is worth careful analysis.
When spraying, spray it on the back of the leaf effectively, because red spiders are mainly stationed on the back of the leaf. It's better to prepare the medicine in advance when you buy rose and other plants prone to red spiders, especially seedlings.
1) These drugs are usually diluted more than 5000 times, while other drugs, such as avermectin, which is most commonly used, are diluted 1000 times.
2) The efficacy of Abamectin and other general drugs is 7 days.
1、 Mite danger (Bayer, Germany)
This is the first low toxic and efficient drug I used. The minimum dose is 100 ml. at that time, the price seemed to be more than 60, but now it is only more than 40. Now I've used the third bottle, and it's expired every time I don't use it. But I think it's cost-effective for me. Please compare the following drugs.
Produced by Bayer crop science company of Germany, the actual ingredient is spirodiclofen, 100ml SC in bottle. Control object: all kinds of mites, including common red and white spiders. The control of eggs, nymphs and female adult mites (not good for male adult mites) was mainly through contact and stomach toxicity. Diluted 4000-6000 times.
Acaroid (produced by Bayer, Germany)
Product features:
1) Broad spectrum acaricides.
2) It can last for 35-45 days. I usually take another medicine 40 days later to continue the next stage of prevention and treatment.
3) The acaricidal mechanism is to inhibit the fat synthesis in the body of harmful mites, destroy the energy metabolism of harmful mites, so as to kill harmful mites, which is different from the acaricidal mechanism of commonly used nerve acaricides, so it has no risk of cross resistance to existing acaricides.
4) It is safe for crops and very safe under different temperature conditions.
5) It has strong lipophilicity and is resistant to rain erosion. Generally, the effect will not be affected by rain 3 hours after spraying.
6) It has low toxicity and is safe to human and natural environment.
2、 Avermectin
Avermectin
Avermectins don't stick pictures. This one has been made in China and produced by many manufacturers. It's very effective to buy products from well-known manufacturers.
This is a broad-spectrum insecticidal and acaricidal agent. Although it has a strong taste, it is actually a low toxic pesticide. The effect of killing red spider and other pests is reliable. It is generally diluted 1000 times. Abamectin has stomach toxicity and contact toxicity to mites and insects, so it can't kill eggs.
I have been using abamectin, but the main purpose is not to kill red spider, because compared with the above three, the duration of abamectin is only one week, and the main control measures are the above three. Avermectin is generally used to kill aphids, thrips, Plutella xylostella, Pieris rapae, whitefly and so on. From the perspective of broad spectrum and low price, avermectin can be called a miracle drug.
When the red spider serious outbreak, avermectin combined with one of the above three, red spider has excellent killing effect. Abamectin is a good choice if the plant is not the king of red spider such as rose. When red spider occurs, spraying twice can solve the problem.
3、 Jinmanzhi
Jinmanzhi
The effective ingredient is 20% suspension agent buflufenac. It is a acaricide developed by Otsuka chemical company of Japan. It is effective to the eggs, nymphs and adults of Tetranychus Tetranychus. It is harmless to all kinds of plants, and low toxic to mammals, aquatic organisms, beneficial organisms, natural enemies and other non target organisms. Diluted 1500-2500 times, lasting for more than 30 days. At present, there are two kinds of packaging, 10 ml in bags and 100 ml in bottles, with the prices of 5-6 yuan and 40 yuan respectively.
Because its dilution ratio is about 2000, and its duration is 15 days shorter than that of acari, acari and imazethazole, I feel that its cost performance is not as good as the first three. The most important thing is that it will increase the frequency of spraying. I don't like spraying, so I use it less.
According to reports, jinmanzhi not only can kill red spider, but also has good control effect on Plutella xylostella, aphids, powdery mildew, downy mildew, etc.
4、 Acari acari
My experience is that the efficacy is similar to the mite risk, which belongs to the first-class low toxicity acaricide. The ingredient is 43% diphenylhydrazide ester suspension agent. At present, it is sold in 5ml bags, and the use multiple is 3000-5000 times. It is produced by kejuya company of the United States.
Acaricide is effective in all life stages of mites, and can kill eggs and adults, which is the most advantage of acaricide compared with other low toxicity and high efficiency acaricides. The duration of effect is long. The duration of effect is about 14 days under 25 degrees. The duration of effect is more than 40 days when the temperature is higher than 25 degrees.
5、 Flower protector
Flower protector
I also started to use pesticide from huahushen. At present, many flower friends are using it, and this kind of medicine is really effective on Starscream, so let's talk about huahushen.
Huahushen didn't specify the active ingredients. Judging from its strong taste, I think it should contain avermectin, which can also be used to kill pests that avermectin can kill, but it can also kill bacteria, so it should be a compound preparation.
Considering the safety of medication, I have already abandoned the use of huahushen. It's better not to use the medicine with unknown ingredients. In addition, its dilution is 200 times, from its price point of view, cost performance is also relatively low, it is better to use avermectin. As for the validity period, I used to use it for about a week.
6、 Leflufeniconazole
Leflufeniconazole
The effective ingredient is 11% ethimazole, and the dosage form is SC. At present, there are two kinds of packaging, 10 ml in bags and 100 ml in bottles, with the price of about 7 yuan and more than 50 yuan respectively.
The manufacturer of imazethazole is Sumitomo chemical column Association of Japan. The main performance of this drug is to have a good killing effect on various forms of juvenile nymphs. It is resistant to rain erosion and lasts for 50 days. However, I usually re spray it around the 40th day. In normal use, it has little effect on beneficial organisms and is safe for crops. Diluted 5000-7500 times, so cost-effective.
As for mite danger, the drug should be used at the beginning of young nymphs of red spider. If red spider is serious, it should be combined with the drug with the efficacy of killing adults.