What are the benefits of spraying pesticides and washing powder? Which pesticides cannot be added with washing powder? Pesticide formula with laundry powder

Usually in the sale of pesticides, it is often asked whether you want to add laundry detergent, when you add detergent, you can weed! Is it true? what are the benefits of spraying pesticides and washing powder? In terms of the chemical composition of laundry detergent, it does not weed, or has little effect.

But why do some technicians let them add laundry detergent?

Here is a key point: washing powder can increase the viscosity of the liquid, so that the liquid can better adhere to the surface of plant leaves without dripping, thus improving the efficacy.

The role of washing powder in this process is to increase the adhesion of the liquid to the leaves, because the sodium alkylbenzenesulfonate contained in the powder is a good adhesive. When mixed with pesticides, the liquid can be uniformly attached to the leaves, preventing the liquid from forming a large number of water droplets on the crop leaves and rolling to the ground, increasing the adhesion of pesticides, so that pesticides can be retained in crops for a longer period of time. It is more resistant to Rain Water scouring.

Most pesticides plus washing powder do not affect the efficacy of pesticides, and can be mixed with pyrethroid pesticides, phoxim, malathion, trichlorfon, dimethoate and other organophosphorus pesticides and chlorothalonil fungicides.

What are the advantages of spraying pesticides and washing powder

When spraying pesticides to control diseases and insect pests, the liquid is easy to form a large number of water droplets on the leaves and fall to the ground, which directly affects the control effect. The practice shows that adding 0.1% / 0.2% neutral detergent to the diluted pesticide solution as an adhesive can not only reduce the loss of pesticide solution, but also improve the control effect. The insecticidal effect of 2500 times insecticide against aphids, whitefly, cotton bollworm, cabbage worm and other pests on grain, cotton, vegetables and other crops is about 85%. The insecticidal effect of adding 0.2% washing powder is more than 95%. The control effect of this method in greenhouse is better than that in open field, because the humidity in greenhouse is higher than that in open field, and the effect is better than outdoor.

Sodium alkylphenylxanthate contained in washing powder is an excellent adhesive. after it is added to the pesticide solution, it can make the solution uniformly adhere to the leaves, thus greatly reducing the loss of pesticides; at the same time, it can also form an impermeable film on the body surface of stinging pests such as aphids and whiteflies, suffocating them to death.

The method of adding detergent: first take 0.1%-0.2% neutral detergent by weight of the pesticide used and use warm hydration to prepare it after it is fully dissolved. When preparing the liquid in the sprayer, first pour the required liquid, then add water to 1/3 of the capacity of the sprayer, then pour in the prepared detergent solution, and finally add enough water, so that the pesticide and water can be mixed evenly.

Most pesticides with neutral detergent do not affect the efficacy of pesticides, and can be mixed with pyrethroid pesticides, phoxim, malathion, trichlorfon, dimethoate and other organophosphorus pesticides and chlorothalonil fungicides. However, it can not be mixed with carbendazim, dichlorvos and other pesticides, but can not be mixed with carbendazim, stone sulfur mixture, thiophanate, carbendazim, dichlorvos and other pesticides. In order to ensure the effect of mixed use of pesticide and detergent, the proportion of pesticide and detergent should be strictly used to prevent drug damage and reduce the effect of prevention and control.

Common pest control with detergent and its use standard

Control pests (mites) (1). Use 400 × 500 times laundry powder solution, 50 kg / mu each time spray liquid to control vegetable mites. (2)。 600 × 800 times laundry powder was used to control whitefly in greenhouse. (3)。 When insect pests occur on the surface of edible mushroom border planting, spraying 1%-2% detergent solution has a strong contact killing effect on mushroom flies, adult mites, old and young mites. (4)。 The mixture is prepared according to the proportion of 2% washing powder, 8% urea and 90% water, which has the control effect on aphids, cabbage insects, red spiders and other pests, and can play the role of extra-root topdressing.

Improve the adhesion performance of the solution: 0.05% 0.1% was added to the solution of Shachongshuang, cyanobacteria, Fenitrobacter, etc., and 0.1% washing powder was added to the solution of carbendazim, isocarbamide, ethylene sclerotiorum, Jinggangmycin, etc. 0.1% 0.2% washing powder was added to the solution of carbendazim, mancozeb, mixed sulfur, etc. Adding 0.2% washing powder to the solution of methyl thiophanil, chlorothalonil, polysulfide, copper oxychloride, etc., can reduce the surface tension of the solution, make the liquid atomize finer, and enhance the adhesion, thereby improving the efficacy. Generally, the effect can be improved by more than 20% and 30%.

Which pesticides cannot be added with washing powder?

Washing powder can not be added in the use of all pesticides, because some pesticides have strong permeability, and the addition of penetrating agents is easy to cause excessive absorption of plants and lead to drug damage.

For example, it can not be mixed with carbendazim, carbendazim dibromophosphate, dichlorvos and other pesticides, but the efficacy will be reduced if mixed with such pesticides.

Matters needing attention in adding washing powder

1. It should not be mixed with pesticides decomposed by alkali.

2. The mixed solution should be used along with it.

3. Use carefully on legumes and melons to avoid drug damage. Generally, it should be tested first and then used when there is no drug harm.

4. The preparation added with detergent should shorten the interval period than the general pesticide, and spray it in time after rain.