Pesticide compounding is a common method used by many people to make pesticides. We know that some pesticides are mixed and used together, which will have a strong effect. However, if some pesticides are mixed, they will lose their efficacy, so whether the pesticides are suitable for mixing. Matching is very important. Let's take a look at the seven key steps in pesticide blending.
Seven key steps in pesticide blending
First, exclude the mix and see the instructions
1. Acidity and alkalinity will affect the stability of the active ingredient. We have to look at the instructions for the use of pesticides. If the pesticide instructions do not stipulate the mixing of alkaline pesticides, then other pesticides that participate in the compounding can not be matched if they are alkaline pesticides.
2. Many pesticide varieties cannot be mixed with drugs containing metal ions. Therefore, if the first pesticide specification stipulates that it cannot be compounded with a metal ion-containing drug, the metal ion-containing agent cannot be mixed.
3. The stereoactive configuration of beta-cypermethrin and cyhalothrin (fungery) is stable only in a narrow pH range. The acidic medium is easily decomposed, while the alkaline medium is It is prone to “transpositionâ€, which reduces the efficacy of the drug and is generally not suitable for compounding.
4, microbial insecticides , microbial fungicides, microbial herbicides can not be mixed with chemical fungicides pesticides. If mixed, the chemicals will kill the microbes of these microbial agents and lose their effectiveness.
5. If the instructions are clear and cannot be mixed with that specific pesticide, then it should be directly excluded.
Second, determine the mix to do the test
Mix the liquid in a transparent glass container and observe if there are any abnormalities such as sediment, bubbles or oil slick. Where the liquid shows a chemical change or the physical properties of the liquid has a vicious cycle, this compounding is not desirable. If there is no problem in the compounding test, the phytotoxicity test of small areas or single crops in the field should be carried out. If there is no phytotoxicity, it can be used in the field.
Third, the pesticide mix does not exceed three
Pesticide mixture is generally suitable for two varieties, and if necessary, it can also be three, and it is easy to produce adverse consequences.
Fourth, the total amount of anti-drugs mixed with discretion
Because of the common goal of preventing the same goal, it is reasonable to help each other. In the preparation method, it is usually a rule of equalization. That is, when the two mixes, each maintains half of the original dose; when three mixes, and so on.
5. Mixing of single-agent pesticides according to “each quantityâ€
The "variables" when treating different targets are also the means used in the prevention of mixed drugs. According to the situation of mixed pests and diseases in the same period, the target of concurrent treatment is confirmed, and mixed drug prevention is adopted. Due to the respective targets, it is reasonable to maintain their effective control dosage (ie “variableâ€).
Six, different dosage forms mixed in order
The pesticide mixture should be added in the order of micro-fertilizer-wettable powder-suspension-water-emulsifier, and continue to stir. After one agent is fully dissolved, add the next agent and mix the two wettable powders. Mix the wettable powder first and then dilute with water.
Seven, mixed with the drug is now available
Mix the pesticides to be used now, use them as soon as possible, and do not store them.
Common medicinal compounding and prevention of pests and diseases
1. Mixture of captan and Bacillus subtilis can significantly control the continuous cropping of crops;
2. The combination of Shensinmycin and well wax bud can control the blight and blight of melon crops;
3, fluorosilazole and organic copper mixed with smear, can speed up the healing speed of melons;
4. Pyrifluzil and thiafuramide are mixed to prolong the efficacy period of citrus saps;
5, hydrazine combined with oxazolidine or methyl sulfide or carbaryl, can control a variety of crop root diseases;
6. The conventional medicine for controlling downy mildew and epidemic diseases can be mixed with organic copper preparations to improve the efficacy by more than 50%;
7. The organic copper preparation is mixed with benzalkonium chloride and iodine solution, which can effectively prevent cucumber target spot disease;
8. Mixed use of prochloraz and iprodione to prevent and control leaf spots of leafy vegetables and anthracnose;
9, avermectin and 44% propanine mixed, can effectively control rice aphids;
10. Mixing of methicillin and tebufenap can prolong the efficacy period of the control of the night moth pests;
11. The combination of avidin and chlorfenapyr can effectively control rice leafhopper and fruit tree borer;
12. Spirotetramat and avermectin are mixed, which has a good effect in controlling pear hibiscus;
13. The combination of avermectin and spirotetramat is effective for controlling whitefly, aphids and thrips;
14. The mixed salt of methacrylate and worm nicotinamide has the effect of double killing of insects;
15. Spirotetramat is mixed with buprofezin or chlorpyrifos to prevent and cure scale insects.
16. The combination of insecticide and chlorpyrifos can greatly improve the efficacy of ginger and heartworm control;
17. Mixing Qiling with thiamethoxam to control beetles;
18, Avi and chlortetracycline can mix and control the leaf miner pests;
19. The combination of thiamethoxam and bifenthrin is effective in controlling mantle and mites;
20, Avi and Qiling or triazolium tin, biphenyl well fat mixing, can control fruit tree red spider and white spider;
21, chlorantraniliprole and chlorpyrifos mixed, can effectively control the night moth;
22, oxyfluorfen and pendimethalin mixed, has a strong effect on the grass, and the prevention of broadleaf.
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