Washing powder is no stranger to everyone. Basic households must be used for washing powder and removing stains. But do you know that washing powder is also very useful in agriculture. So what can washing powder do in agriculture? The following small series talks about the use of washing powder in agriculture.
The original washing powder is a contact insecticide and acaricide. The four pests (aphids, red spiders, whitefly, and scale insects), which are often prone to planting vegetables, flowering, and fruit trees, have good control effects.
1, washing powder alone
When controlling pests such as aphids, whiteflies, red spiders, cabbage caterpillars, scallops, and moths, use the washing powder 900 times to 1000 times to spray the leaf back and the shoots. After about 1 hour to 2 hours, the mortality rate is 100. %; control pests such as scale insects, peach aphids, spray 500 times liquid to 700 times liquid, spray once every 3 days, even spray 3 times, the insecticidal rate can reach 94% to 99.4%.
2, washing powder mixed with urea
The liquid medicine prepared by this method is commonly called "the urine washing agent", which not only has a good insecticidal effect, but also functions as a root dressing. The preparation method comprises the following steps: using 0.5 kg of washing powder, 2 kg of urea and 200 kg of water, and dissolving and dissolving after being mixed; when used, generally spraying 50 kg to 100 kg per mu. This method is mostly used to control aphids, cabbage caterpillars, red spiders, etc. on cotton, vegetables and flowers; since urea has the effect of destroying chitin of insects, it has better control effect than washing powder alone.
(1) Mechanism
Urea has the effect of destroying the chitin of the aphid body wall. The washing powder contains the surfactant sodium alkylbenzene sulfonate, which can dissolve the wax layer of the aphid body wall and adhere to the surface to form a water-impermeable, gas-tight film. , causing the mites of the mites to block and suffocate and die. The combination of the two has the advantages of high efficiency, no pollution, convenience and topdressing effect.
(2) Preparation
The preparation ratio of washing powder, urea and water is 1:3:300. When preparing, use hot water to turn on the washing powder, then add urea and water, and mix well.
(3) Precautions
Stir well during preparation, do not leave particles, these particles are easy to cause the leaves to burn. Spray evenly, be sure to spray the liquid on the mites, otherwise it will not work.
3, washing powder mixed with diesel
The "Washing Emulsion" which is a mixture of diesel oil and washing powder has a strong penetrating and contact action, and has special effects on various pests such as whitefly and scale insects. The preparation method comprises the following steps: first dissolving 0.5 kg of washing powder into a thin paste with 1.5 kg of water, and heating 2.5 kg of diesel oil to 60 ° C to 70 ° C with water, and then slowly injecting into the washing powder paste while adding side Stir, stir well, spray with a sprayer in another container, fully emulsifie, dilute with water and use.
4, washing powder mixed with engine oil
First dissolve 2 parts of washing powder with 2 parts of water, then add the oil equivalent to 1/20 of the total amount of washing powder and water, stir evenly, and set it as mother liquid after standing for 1 hour; use 150 times to 200 times liquid in winter and early spring, In the summer and autumn season, 200 times to 300 times liquid spray can be used to control the red spider effect by more than 98%.
5, mixed with chemical pesticides
When using chemical pesticides to control pests on vegetables with more waxy substances (such as cabbage), adding 0.1% washing powder to the liquid can enhance the adhesion and spreading of the liquid, thereby improving the control effect.
When the washing powder is used, the front and back sides of the blade must be sprayed to make it touch the insect body, so as to have an insecticidal effect, but it cannot be used multiple times.
The above is the magical effect of washing powder in agriculture, which has a miraculous effect on killing pests. However, Xiaobian reminds everyone to prepare to use the washing powder in agriculture. Pay attention to the quick harvest when using the dish. Use caution when cleaning (we must wash the dish several times when using it). The use of small dishes that have just emerged from the soil should also be used with caution. And the above description is that the washing powder is not a laundry liquid, and most of the washing powder is alkaline, and a neutral washing powder should be used.
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