1 powder
Powder can be used for powder spraying, seed dressing and soil treatment, suitable for areas with difficult water supply and areas for controlling fulminant pests and diseases.
The dusting method is the most commonly used powder application method, which mainly uses airflow to blow the medicament to make the powder fly in the air, and then uses the gravity of the powder to sink to the control object. The spraying of powder generally requires a dedicated dusting device to form sufficient wind to overcome the flocculation of the particles. Since the powder sprayed by the dusting method has a strong ability to fly in the air, the operator must wear a mask and wear protective clothing, and must pay strict attention to meteorological conditions when spraying. The powder is preferably applied in a windless or relatively closed environment (greenhouse).
The seed dressing method is also a commonly used powder application method, which mainly uses the dried powder to form a uniform adhesion on the surface of the treated seed, thereby protecting the seed. The seed dressing method generally requires the use of a special seed dressing machine and seed dressing at the corresponding speed to form a uniform adhesion of the agent and the seed.
The use of powder for soil treatment can be divided into methods such as application and ditch application. The dusting method is generally carried out by diluting the powder with fine dry soil and combining it with the soil to facilitate uniform mixing of the medicament and the soil. With ditch casting, attention should be paid to the safety of the agent used and the seed or crop.
Powders are generally difficult to disperse and suspend in water, so they cannot be sprayed with water.
2 granules
Granules are mainly applied by direct application. It can be applied directly by hand or by mechanical spraying. It is mainly used to control underground pests, borers of grass crops and various fly larvae. Due to the difficulty in spraying rice fields, many insecticide varieties and insecticides for controlling pests such as rice planthoppers are also processed into granules. Due to the large particle size of the granules, the falling speed is fast, and the application is affected by the wind, the targeted application of the pesticide can be achieved. In addition, due to the granulation of the preparation, the highly toxic pesticide preparation can be made low-toxic, and the granules can be applied by direct application. Despite this, safety must be applied during application, especially when applied directly by hand, gloves must be worn and the palms kept dry.
In the case where the hazard of a pest can be predicted, the use of granules is more effective than spray control, especially in many meteorological conditions that are not conducive to spray use. If the soil is dry, the plant's absorption of pesticides will be low, and the movement of pesticides to the roots of the plants is also limited. Therefore, some pesticide granules are most suitable for use in irrigated soils where soil moisture is guaranteed. Of course, too much soil moisture can cause plant phytotoxicity. Granules are generally sprinkled near the seed or seeded at the time of planting. In addition, individual plants can be treated in a targeted manner during the growing season.
The granules are treated with soil for seeding or seeding around the roots of the plants, and need to be tested for phytotoxicity, otherwise the relative position needs to be maintained. The application of granules in paddy fields generally requires maintaining a certain layer of water to facilitate dispersion of the agent and contact with the target.
The effective content of pesticide granules is generally low (10% or less), the active ingredient is highly toxic, and generally no surfactant is added, so the granules cannot be sprayed with water spray. On the one hand, it is easy to cause operator poisoning, and it can not achieve the proper control effect; on the other hand, it can not exert the advantage of simple and targeted dosage form of granules, and also cause economic waste.
3 ultra low volume spray (oil) agent
The main application method of the ultra-low-volume spray (oil) agent is the mist method or the ultra-low-volume spray method, which is not directly diluted with water, and the preparation is directly sprayed using a mist sprayer or an ultra-low volume sprayer. This method is especially suitable for the control of harmful forests in the mountains, and is also suitable for relatively closed environments such as greenhouse protection sites and warehouses. However, since the droplets formed during the application of the ultra-low volume spray (oil) agent are very fine, the droplets are greatly affected by the wind and are not suitable for operation in windy weather. In addition, the application must also pay attention to the application of the personnel to the upper vent, to avoid exposure to the drug mist to avoid poisoning.
Ultra-low volume spray (oil) agent contains more high-boiling oil solvent, can not be used as a constant spray; generally does not contain or rarely contains surfactant components such as emulsifier, can not be used with water spray, so as not to cause phytotoxicity to crops .
The pesticides used directly without dilution include: powder preparations for powder spraying (powder, contact powder, floating powder), and preparations for granule method (granules, large granules, fine granules, microgranules, microcapsules) Granules), special shape preparations (blocks, pellets, sticks), bait preparations (bait, rubber bait, lure), preparations for ultra-low volume spray technology (ultra-low volume liquid, ultra low volume micro Suspension agent), a preparation used in smoke technology (hot aerosol, cold spray), and the like.
The Cloth face mask is small, fold-able and wrinkle-free, this stylish Face Mask can be used anywhere to keep you fashionable and safe. Stretchy ear loops and adjustable wire nose fitting ensure comfort over long periods for any size face.
Cloth face mask, cotton face mask, reusable face mask, washable face mask
Shandong Shengquan New Materials Co., Ltd. , https://www.sqnewmaterials.com