The "Red Spider" fights every year, or it breaks out without paying attention. The difficulty of "red spider" prevention and control has always been a problem for fruit growers and friends. Mainly because many fruit growers have problems with the choice of drugs at different times! Today, I will tell you about several "red spider" control agents commonly used at different temperatures.
1, alkyne mite + mineral oil: this formula is recommended to be used at low temperatures, mineral oil is through the principle of physical characteristics of insecticide, spraying on the surface of the plant to form a layer of oil film. Choke the "red spider" to death. No resistance develops. Alkyne mite has a good anti-mite effect when the temperature is above 20 °. These two drugs were used as the first anti-red spider in early spring and March, and the effect was good. However, it is necessary to pay attention to controlling the concentration of mineral oil, high concentrations of mineral oil may seal the leaves of the young shoot stage, hinder the exchange of new shoot gas, and lead to drug damage. In addition, mineral oil is strictly prohibited to be used during high temperature periods, and the use of mineral oil when the temperature exceeds 30 ° will seal the pores and produce "sunburn leaves" and "sunburn fruits". Do not use mineral oil when drought and frost cause trees to decline. Mineral oil can be said to be a "double-edged sword", and if it is used well, it can "kill a thousand enemies", and if it is not used well, it is "self-inflicted eight hundred".
2. Pyridoxine: Pyrida mite has a strong touch-killing effect and has no internal suction effect. It is effective against both eggs and adults of "red spiders" and has good quick efficacy. Moreover, the efficacy is not affected by temperature, and it can also exert its efficacy at low temperatures. However, be careful not to use it continuously to avoid resistance. It is recommended to use compounds such as Avi pyridoxine, tetracyclide, pyridoxine, insect mite nitrile and pyridoxine.
3. Bihydrazine and ethanazole: The formula is a mite killer compounded by a mixture of ethoazole and biphenylhydrazine ester, which has a strong osmotic effect, whether it is a good effect on adult mites, mites, or insect eggs. Recommended for use at temperatures above 25°. Biphenylhydrazine ester has an effect on insect forms other than eggs, with excellent quick effect, and red spiders can be seen to die basically at 24-36 hours. Ecformazole is an excellent oviculide that kills red spider eggs and nymphs by inhibiting the embryonic formation of mite eggs and the molting process from juvenile mites to mites. The compound formula ensures a long shelf life of the agent and is an excellent choice for the control of red spiders.
4. Ethazole acarbonitrile: Ethazole acarbonitrile is the first new acaricide with completely independent intellectual property rights in China, which is developed by Shenyang Sinochem Pesticide Chemical. It was first listed in China in April 2017, and has a good killing effect on eggs, young mites, nymphs and adult mites at all stages. Fast-acting, long-lasting, and low toxicity, insensitive to temperature, especially highly confrontational orchards think that its unique mechanism of action has achieved good results. The only drawback is the high price compared to other acaricides.
5, fludylamine: some people will say that fludylamine is a fungicide, how can you fight red spiders? This is really not the author's scribble. Fluridamine as a fungicide also has a good insecticidal effect on red spiders, and is a dark horse against red spiders. The mode of action of fludylamine sterilization is more unique, by inhibiting the activity of mitochondria in the pathogen, so that the pathogen lacks energy and dies, and most fungicides on the market have no cross-resistance. Fluridylamine also has a long shelf life, with use in different regions showing a 40-60 day duration. However, fluridylamine also has great disadvantages: (1) Fluridylamine has strong permeability, so try not to mix with silicone, imidacyum, boron fertilizer, organophosphorus and other strong suction, endosmotic, strong acid, strong alkali agents. Otherwise it is easy to appear drug damage (2) it is easy to be oxidized by the air into red, if fludylamine is exposed to the air for a long time, it will be oxidized into red, and it will lose its efficacy after oxidation, so fludylamine is recommended to be ready to use, and it cannot be used because of rain. Of course, all pesticides are recommended to be used now.
Of course, in addition to the above several drugs, there are many options for controlling red spiders
Egg(larval) agents: thiamine, tetraamazine, spironyl ester
Adult (larval) agents: avermectin, azole mite
Insect eggs are all killers: triazoltin, methotrexate, biphenylhydrazine ester, butyrofluoride, azoleamide
In general, the control of citrus red spiders is not an overnight thing, and the above formulations are recommended to be used alternately to avoid resistance. Of course, pay attention to the temperature and the recommended use period, as long as the potion is reasonably matched, the red spider control is also very simple!