Instructions for selecting suitable herbicides for growing vegetables in greenhouses

In recent years, in the winter with relatively low temperature, greenhouses, greenhouses or other methods of covering the mulch film are used to increase the temperature and heat preservation to promote the early maturity of vegetables, and to use chemical pesticides to weed, saving time and effort. However, many years of experience in chemical weeding in the film tell us that if the herbicide used is inappropriate or the application method is wrong, it will not only eliminate weeds, but also cause phytotoxicity in vegetables, causing environmental pollution and reducing the market for vegetables. value. In order to give full play to the effect of herbicides, the herbicides recommended by the Chinese Pesticide Network for the use of solanaceous, legumes and leafy vegetables are as follows:
Solanaceous vegetables such as tomatoes, eggplants, peppers, etc., optional herbicides: 72% Duer emulsifiable concentrate 100-150 ml per mu or 48% dilamine emulsifiable concentrate 150-300 ml per mu, respectively, 30 kg of water Covering the mulch after sowing; 33% weeding emulsifiable concentrate 150-300 ml per mu or 24% gerber emulsifiable concentrate 50-100 ml per mu or 50% Secchin WP 5,000 g per acre, respectively, 40 to 50 kg of water, Cover the mulch after spraying the drug before seeding.
Beans such as peas, edamame, cowpea, etc., the recommended herbicides for pesticide manufacturers are: 48% trifluralin emulsifiable concentrate 100-150 ml per mu, 40 to 50 kg of water; 50% oxalofenone wettable powder per mu 23~45g of active ingredient, 40~50kg of water, apply soil before planting after sowing, and then plant the film; 33% weeding emulsifiable concentrate 150~200ml per mu, 50% acetochlor EC per acre 70 to 150 ml, 40 to 50 kg of water, or 50% of the Cimajin WP. The active ingredient per acre is 33 to 100 g, 40 to 50 kg of water, and the film is applied before emergence.
Cruciferous vegetables such as Chinese cabbage, red cabbage, cabbage, cauliflower, etc., optional herbicides: 33% weeding emulsifiable concentrate 100-150 ml per acre, 48% cable emulsifiable concentrate 150-200 ml per acre, 50% Killing grass emulsifiable concentrate 100-150 ml per mu, 50% Dahuili wettable powder 100-200 grams per acre, respectively, 40 to 50 kilograms of water, sprayed on the surface before filming.
Points to note when applying herbicides in the membrane:
First, the amount of water per mu should not be too low. Only by ensuring humidity can the herbicide exhibiting and penetrating ability be enhanced;
Second, it is not possible to spray repeatedly when applying the medicine. It should be in place once to avoid increasing the concentration and causing phytotoxicity;
The third is the high volatility of trifluralin and oxazinone. After application, be sure to mix well with the soil and mix well to 2~3 cm;
Fourth, the film must be strict, neither pesticides should be leaked or the film should be leaked. It is found that the film should be covered in time.

Nickel And Nickel Alloys

Nickel is a versatile, highly corrosion resistant element that will alloy with most metals. Due to its corrosion resistance, nickel is used to maintain product purity in the processing of foods and synthetic fibers. It is highly resistant to various reducing chemicals and is unexcelled in resistance to caustic alkalies. In addition, nickel has good thermal, electrical and magnetostrictive properties. Relatively high thermal conductivity of this metal has lead to its frequent use for heat exchangers

Commercially pure or low-alloy nickel may contain very small amounts of alloying elements to absolutely none. By contrast nickel alloys contain significant amounts of added elements. Nickel and nickel alloys are both non-ferrous metals that are useful in a range of applications, most of which involve corrosion resistance and/or heat resistance.

Nickel Alloy alternatives to trademark [brand" names.

Alloy C276 alternative to Hastelloy C-276 and Hastelloy C
Alloy B-2 alternative to Hastelloy B-2
Alloy C-22 alternative to Hastelloy C-22
Alloy X alternative to Hastelloy X and Inconel HX
Alloy 20 alternative to Carpenter 20 and Incoloy 20
Alloy718 alternative to Inconel 718
Alloy 800 alternative to Incoloy 800
Alloy 800H/HT alternative to Incoloy 800H/HT
Alloy 400 alternative to Monel 400
Alloy K-500 alternative to Monel K-500
Alloy 625 alternative to Inconel 625
Alloy 600 alternative to Inconel 600
Alloy 601 alternative to Inconel 601

Nickel Alloy Heat Exchanger Tube

Nickel Alloy Heat Exchanger Tube,Nickel Alloy Seamless Tube,Nickel Alloy Asme Tube