Common seedling invasive diseases include rickets, blight, anthracnose, and leaf spot. Such diseases occur quickly and are contagious to each other, often resulting in lack of seedlings and ridges, and timely pesticide control is the key.
Cultivation and disease prevention adhere to the rotation system, not the same seedlings are continuously cultivated in the same block, and the plots are not in the low-lying and easy-to-water plots, and the nursery grounds must have corresponding irrigation and drainage facilities. Fine soil preparation, timely sowing, pay attention to the depth of sowing, the cover soil is not too thick, so that the seeds can quickly sprout seedlings, which can enhance the stress resistance of the seedlings. Adding decomposed organic fertilizer to meet the requirements of seedlings for various nutrients, so that seedlings grow robustly.
Seeds are sterilized before seeding, and the weak seeds are eliminated. The weak germination rate is low, and it is often the initial source of infection. Spray the seeds with 0.5% formalin solution, mix well and cover the stack for 2 hours, then spread out until the formalin gas runs clean and then plant. The pesticide network recommends pre-wetting the seeds in cold water for 4 to 6 hours, then immersing them in warm water at 49 to 50 ° C for 10 minutes, taking them out and drying them.
The soil treatment will loosen the soil 2 to 3 weeks before sowing, and 40 ml of formalin per square meter will be used for 1 to 3 kg of water (the amount of water will depend on the soil moisture), and the film will be covered for 4 to 5 days after being wet. After the film is uncovered, the drug is volatilized for about 2 weeks and then sown, or 50% carbendazim WP or 10% thiophanate or 50% thiram or 70% trichloronitrobenzene. 8 to 10 grams of rice, add 10 to 15 kilograms of dry fine soil, mix into the soil, and then spread one-third of the soil evenly before the sowing, and then the remaining two-thirds after sowing. The soil is used as a cover soil and keeps the soil moist.
For the treatment of root diseases, if a few diseased plants are found in the nursery, the copper ammonia mixture can be sprayed after disinfection. The formulation is: 2 parts of copper sulfate, 11 parts of ammonium carbonate or 2 parts of copper sulfate, 15 parts of ammonium sulfate, 4 parts of slaked lime, thoroughly mixed, and sealed for 24 hours. When using, take 1 part of medicine and 400 parts of water spray, and spray again after 7-10 days. When the humidity of the soil surface is too high after spraying, the ash can be sown to reduce the humidity. According to the China Pesticide Network , for the above-ground diseases such as leaf spot, you can spray with 1% Bordeaux mixture, 50% dexamethasone, and daisen zinc, and spray once every 7 to 10 days until the disease is controlled. until.
Nanomicro Tech has developed black microspheres based on a proprietary composite of silica and polymer. These composite microspheres are intensely black and darker than other similar products on the market. Employed as a spacer in liquid crystal displays (LCD), the black microspheres not only control the thickness of the liquid crystal layer but also prevent leakage of light through the microspheres to improve the contrast of the LCD panel. When immersed or dispersed in a medium for the application, the dark color does not fade or leach out of the microspheres. Current production of the black spacer centers around mainstream sizes of 4.0 and 6.0 µm. When placing an order of the product of other particle sizes, a lead time should be considered.
Black Ball,Black Ball Beads,Spacer In Lcd Use
Suzhou Nanomicro Technology Co., Ltd. , http://www.nanomicro-technology.com