"Currently active mix" of pesticides against pests mixed raw facts, in accordance with the principles of efficiency and safety of pesticide to rid mixed at the scene of two or prevention of pesticide mixed form of two or more. The flexibility of own control and the applicability of production requirements are often widely used. Due to the different medicinal properties of pesticides, different control objectives, and mixed purposes, various preparation methods will emerge. Based on the examples, we will separately describe the “decrease†of the same target, the “variables†when treating different targets, and the “modulation†of the “specialized†pesticides under the specific requirements of the second category:
First, the "decrease" when the same target is prevented. It is a common means of mixing drugs. 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. For example, when controlling sweet pepper gray mold, it is applied by mixing 50% carbendazim wettable powder 1000 times liquid and 50% chlorhexidine wettable powder 2000 times liquid. In the preparation, the amount of the mixed pesticide is half of the original dosage (500 times solution for carbendazim and 1000 times solution for chlorhexidine). For example, when controlling the larvae of Spodoptera litura and Spodoptera litura, 5% of the gram of emulsifiable concentrate 2000 times, 75 liters of liquid per acre, and 20 ml of 5% cypermethrin emulsifiable concentrate are applied. In the preparation, it basically conforms to the halving rule (single-proof card should be diluted 1000-1500 times, cypermethrin should be diluted 3000 times). For example, when weeding weeds in the spring wheat field, it is expressly applied to the respective half-bucket mixing of 2% Baicaling Suspension + 10% bensulfuron-methyl WP. Numerous application examples are classified as equal-additional "fixed" rules for this class. However, under the obvious synergy, it can be “reducedâ€. For example, the control of rice brown planthopper, each acre with 25% chlorpyrifos WP 10 g + 10% leaf è‰ powder WP 100 g compound application. In the preparation, the amount of the mixed pesticide was significantly lower than half. It can better reflect the synergistic effect (25~30g for the single-proof time and 250g for the leafhopper).
Second, the "quantity" when treating different targets. It is also a means of mixing drugs. According to the same period of pests and weeds Mixed truth, confirming Tongzhi target, the choice of anti-drug mix. Due to the respective objectives of each defense, it is reasonable to maintain the rules for their effective prevention and control (ie, "each amount"). For example, when rice paddy rice planthopper and sheath blight are mixed, apply 25% per acre with a mixture of 25% chlorpyrifos WP 25 g + 5% Jinggangmycin water 100 ml. In the preparation, the mixed pesticides are basically the respective control objects of each tube, and the original doses are used alone (20-25 grams for the single-prevention time and 100-150 ml for the Jinggangmycin). For example, when cucumber fungal downy mildew and bacterial angular spot disease are mixed, 40% ethyl phosphine aluminum wettable powder 250 times liquid + 50% succinic acid copper acid wettable powder 500 times liquid is mixed and applied. Although they belong to the same disease category, they are divided into different pathogens. Therefore, the ethyl phosphine aluminum and the succinated acid copper are each protected against each other's targets, and in the preparation, the "each amount" must be used. (Single anti-time ethyl phosphine aluminum with 250 times liquid, succinic acid copper with 500 times liquid). Another example is the powdery mildew, spotted leaf disease, leafhopper and other mixed pests after the apple falls. Use 15% powder rust WP 1000~1500 times liquid + 10% oxymycin WP 1500 times liquid +1.8 % avermectin 5000 times solution was applied. In the preparation, the three-parallel pesticides also use "each amount" for each target. However, when it is formulated with the "various amount" of the same prevention and treatment application, it will still change for some reason. For example, when controlling weedy weeds such as broadleaf weeds, sedges and valerian in transplanted rice fields, use 10% agricultural turbidity powder 13~20g/60% butachlor EC 40~50ml per mu. Formulated for administration. In the preparation, due to the main defense against broad-leaved weeds in rice fields, the original effective amount when the agricultural crops are kept alone, while the anti-butachlor needs to be lower than the original half amount (13~27 grams when used alone) Oxalate is used in 83~150 ml).
The method of formulating the mixed pesticides in the above two categories is a practical and typical “exampleâ€. There will be irregular "quantization" under specific requirements. The requirements are: saving money, avoiding phytotoxicity, biochemical combination, etc. 1 save money. For example, the rice leaf roller is treated with a mixture of 5% fipronil suspension, 10 ml of +15% triazophos emulsion, 60 ml per acre. In the preparation, the high-priced fipronil is reduced as much as possible to 1/3; triazophos is also less than 1/2 (30 ml for fipronil and 150 ml for triazophos). 2 Avoid phytotoxicity. For example, in the spring soybean field, the annual gramineous and some broad-leaved weeds (shallow mixed before sowing) are mixed with 48% of chlorhexidine emulsifiable concentrate 50-67 ml + 48% trifluralin emulsifiable concentrate (67 ml) to effectively reduce long-lasting effects. The use of chlorhexidine can improve the safety of the sputum. In the preparation, the dosage of chlorhexidine was reduced to 1/2~1/3 of the original amount, and the amount of fluoxetine was nearly half (150~170 ml for single anti-time and 150-140 ml for trifluralin). 3 biochemical combination, reducing the amount of pesticides. For example, in the control of Plutella xylostella pests, 50 to 60 liters of liquid per 600 grams of Bacillus thuringiensis (Bt) preparation containing 10 billion live spores per gram, and then mixed with 18% of insecticidal double agent 100 ml. (Single-proof Bt uses 100~300g, insecticide double uses 200~250ml). In addition to complementary efficacy, reduce the amount of insecticidal double pesticides. In the preparation, Bt only uses a low amount, and the insecticidal double is reduced to less than half. 4 For difficult and refractory pests and diseases, such as the prevention and treatment of heavier and algebraic pears, the use of 25% chlorpyrifos 3, 1000~2000 times liquid + 50% malathion EC 1000 times Mixed application. Due to the refusal of the remedy, in the preparation, the pesticide should be more than half of the amount, or maintain the original effective amount. It can be seen that the mixed preparation must take into account the various specific requirements, and must be “quantized†reasonably within the “decrease†and “quantity†operating ranges. However, it should be followed when mixing and mixing: the amount of each mixed pesticide should not exceed the amount used when it is used alone.
Since there is a risk in the current mixed use, it should be noted before preparation and use:
1 Clear control objectives. According to the control objectives and requirements to determine the mixed preparation of pesticides, do not "ideally" to mix and match, otherwise it will reduce the effectiveness to invalid and crop phytotoxicity, human and animal poisoning.
2 Implement the various “forbidden mixing†instructions for mixing. All mixed negative effects such as reducing efficacy, over-limitation, poisoning, harm to the environment, and increased expenses should be discontinued.
3 Learn from the mixed experience. You can obtain professional technician guidance, check the pesticide mixable table and mixed notes in the technical data, analyze the commercially available mixture labels, and borrow the experience of mixing yourself and others.
4 test safety and efficacy first. In the absence of experience, it is necessary to pre-mix the mixed cell test, observe the efficacy and safety effects, and confirm that it is beneficial and harmless before it can be applied.
5 face up to the mixed risk. On-site blending is a “rough†formulation that is difficult to operate and risky. In order to avoid unpredictable risks, try to use and use commercial pesticide mixtures. You don't have to do everything together.
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