It is understood that more and more farmers have used pesticide fungicides to control various diseases of crops for many years, and the use of pesticide fungicides has greatly increased the economic income of farmers. However, even the best products should use the right method. The following 7 points are issues that cannot be ignored during the spraying of the fungicide: 1. Reasonable concentration When sprayed with a bactericide (including a liquid and a wettable powder), it is necessary to formulate or dilute the agent to a suitable concentration with water. Different bactericides have special requirements for their concentration. When formulating the concentration, they must be operated strictly in accordance with the instructions for use. Do not increase or decrease at will. If the concentration is too high it can easily lead to injury, the concentration is too low to achieve the effect of drug use prevention and treatment of disease. 2. Cautious drug mix Many fungicides are alkaline pesticides , so they cannot be mixed with insecticides that are easily decomposed and decomposed by alkaline substances. Such as Bordeaux liquid, stone sulfur mixture and other alkaline, can not be mixed with 1605, dimethoate, dichlorvos, etc., otherwise neutralization reaction will occur and fail. There are also some fungicides such as carbendazim and Beauveria bassiana that cannot be mixed with boricides such as Bordeaux mixture, stone sulphur mixture, and thiophanate, which may cause the insecticidal (bacteria) microorganisms to lose physiological activity or insecticidal (bacteria) ability. Invalid. Of course, not all fungicides can be mixed with other pesticides. A small number of fungicides can also play a synergistic role when mixed with pesticides. For example, dimethoate mixed with acid bactericidal properties such as zinc or wettable sulfur or colloidal sulfur will not only affect the efficacy of the drug, but also improve the efficacy of the drug. 3. Select the spraying time Premature spraying time not only causes waste, but also reduces the control effect. The spraying time is too late, because a large number of pathogens have invaded the host or caused harm. Therefore, the use of fungicides should be based on the occurrence of different diseases of the crop, prediction and prediction, and the specific circumstances of the disease. Usually, the time of administration of the fungicide should be prior to the onset of the disease (protective use) or the initial stage of the disease (preventing it). 4. Master the number of medications The spraying frequency of the bactericide is mainly determined according to the length of the residual period of the drug and the meteorological conditions. Usually spray once every 10-15 days, a total of 2-3 times. In case of special circumstances, such as rain after application, it should be refilled once in time. 5. Improve the quality of medication The spray quality of the bactericide includes the amount of the drug and the quality of the spray. The amount of medication should be appropriate. Don't increase the cost and cause phytotoxicity because of too much medication, and don't use the medicine because it is too small. When spraying, the fog is required to be fine and uniform. It is necessary to spray the stalks of the plants and the front and back of the leaves, so as to avoid leaking. 6. Pay attention to avoiding drug resistance The long-term use of a single fungicide (mainly a systemic fungicide) can lead to resistance to pathogens, even if repeated use of drugs will not help, or even worse. In order to avoid disease resistance, it is necessary to do a good job of alternating (rotary) use of different types of pesticides on the basis of scientific selection of pesticides. It is strictly forbidden to use one pesticide for a long time. 7. Strictly prevent phytotoxic There are many reasons for the bactericide to cause phytotoxicity. Generally, the highly water-soluble agents are prone to phytotoxicity, and different crops have different sensitivities to the medicinal agents. For example, Bordeaux mixture generally does not cause phytotoxicity, but copper-sensitive crops may Produce phytotoxicity. Beans, potatoes, and cotton are sensitive to stone sulphur mixture, and the chance of phytotoxicity is high. In addition, the response of the crop to the agent at different stages of growth and development is also different, and the seedlings and the flowering stage of the boot are prone to phytotoxicity. In addition, the occurrence of phytotoxicity has certain relationship with meteorological conditions such as temperature and sunshine. Generally, the use of drugs under high temperature and drought, strong sunshine or heavy fog, high humidity, etc. is very likely to cause crop phytotoxicity. More pesticide knowledge , please pay attention to China Pesticide Network lithium Fluoride Basic Information Lithium Fluoride CAS No.7789-24-4 Doped Yttrium Lithium Fluoride,Gadolinium Lithium Fluoride,Ka Of Lithium Fluoride,Lif Lithium Fluoride ShanDong YingLang Chemical Co.,LTD , https://www.sdylhgtrade.com
Product Name: Lithium fluoride
CAS: 7789-24-4
MF: FLi
MW: 25.94
EINECS: 232-152-0
Mol File: 7789-24-4.mol
Lithium Fluoride Chemical Properties
Melting point: 845 °C(lit.)
Boiling point: 1681 °C
Density: 2.64 g/mL at 25 °C(lit.)
Fp: 1680°C
Storage temp. :Store at +5°C to +30°C.
Solubility: Soluble in 0.29 g/100 mL (20°C) and hydrogen fluoride. Insoluble in alcohol.
Form: random crystals
Color: White to off-white
Specific Gravity: 2.635
PH: 6.0-8.5 (25℃, 0.01M in H2O)
Water Solubility: 0.29 g/100 mL (20 ºC)
Sensitive: Hygroscopic