In the case of low temperature weather, the activities and pests of pests and diseases are mostly in a hidden state. In the low temperature stage, chemical pesticides should be applied. In addition to the choice of roads, the following points should be noted:
1. Choose the medicine for sunny days and high temperature. In the high temperature season, the effect is generally good after 4 pm, when the leaves of the crop absorb the most pesticides. In winter, it is different. It is best to choose a sunny day when the temperature is high. For example, when the herbicide is applied at a high temperature, the weeds absorb the agent at a high speed, a large amount, and the metabolic decomposition is difficult, so that the purpose of weeding is easily achieved.
2. Appropriate increase in dosage. The pesticide lethal dose of pests is not constant. The higher the temperature, the lower the lethal dose of pests. Therefore, it is necessary to increase the dosage in winter to prevent death from pests and diseases. The increase in dosage should be determined according to the temperature, but generally it should not exceed the conventional medication. 50% of the amount. The application of pesticides in winter requires strict addition of water according to the dilution factor, and the amount of water cannot be reduced at will.
3. Reasonably select pesticides suitable for winter application. In general, stomach poisons and contact agents are less affected by temperature, and systemic and fumigants are more affected by temperature. Such as trichlorfon, dichlorvos, dimethoate, omethoate, methamidophos and other insecticides , low temperature will significantly affect its insecticidal effect; and pyrethroids, deltamethrin and other insecticide-like pesticides and Pesticides such as phoxim and stone sulphur mixture can still exert better insecticidal effects when applied at lower temperatures. Therefore, when applying pesticides in winter, it is best to use the latter types of pesticides. The herbicide is used in the low temperature season in winter, and the time for displaying the effect is much longer than that at the high temperature. As long as the liquid is sprayed in place, it is generally not necessary to re-medicate.
4. Extend the safety interval of crops. The pesticides applied in winter have a slow degradation rate, so the residual period in the crops is relatively prolonged. Especially in the prevention and control of diseases and insect pests such as vegetables and flowers in winter, special attention should be paid to prolonging the safety interval of pesticides to ensure human health and prevent poisoning accidents. occur.
5. Give priority to the use of soil pesticides. The price of soil pesticides is low, and the disadvantage is that it is easy to produce phytotoxicity. However, the fruit trees are resistant to pesticides during the dormant period in winter. It is economical and effective to control pests with pesticides such as Bordeaux mixture and stone sulphur mixture.
6. A small packet of "medicine primer" or 15 grams of vegetable oil can be added to each barrel of the diluent as an adhesive, but it cannot be used when used on vegetables.
H135
A type CPE performance
Mainly used as the impact resistant modifier of PVC. At present, it takes 95%
share of the impact resistant modifier market of domestic PVC. The additive
shares of H135 A type CPE as the impact resistant modifier of PVC profile
shapes is 9~ 12; the shares as the impact resistant modifier of PVC water
feeding pipe and other liquid transfer pipe under pressure is 4~ 6; this can
effectively improve the low temperature resistant impact property of PVC
product. In addition, H135A type CPE is widely added into the products including
PVC plate, sheet, calcium-plastic box, case of household appliances and
electrical appliance fittings to improve the mechanical property and electrical
property.
H135 A type CPE can be compatible and use with most plastics and rubbers
simultaneously. The polymer cross blend system with bad compatibility can take
CPE as bulk filler. The rubbers used together with CPE include caoutchouc,
butadiene styrene rubber, ethylene propylene diene copolymer, polyurethane
rubber, acrylonitrile butadiene rubber, neoprene and chlorosulfonated
polyethylene etc. The plastics used together with CPE include PVC, PE, PP, EVA
and PA etc, which greatly improve the low temperature resistant impact property
and increase flame resistance, oil and aging resistance, corrosion resistance
and insulatibity. This can make the plastic product have high filling property
and reduce production cost.
Packing and Storage :
PP bags with PE film inside, Net Weight of 25 ± 0.2kg per bag ; as the viscoelastic and water absorption of CPE resin are strong, this product shall be stored in the dry and ventilated warehouse with stack height no more than 10 bags and avoid solarization, damp and takes strict precautions again stress. It is not dangerous cargo.
CPE
Polyethylene Film,Chlorinated Polyethylene,Polyethylene Resins,CPE Plastic Sheet
Shandong Gaoxin Chemical Co.,Ltd , http://www.gaoxinchem.com