1. To cure worms: The “wash urine mixture†prepared by mixing urea, washing powder, and water in a ratio of 4:1:400 has good control against harmful insects such as aphids, cabbage caterpillars, and red spiders that cause damage to vegetables and flowers. Effect; In the spawning period of cabbage caterpillar, with 1% to 3% of lime water or 1% to 3% of superphosphate soakage liquid spray, more than 52% of eggs can be avoided within one week. 2. Treat dead insects with dead insects: Pick 100 grams of cabbage caterpillar per mu, smash and rot, add 250 ml of water, add 50 grams of detergent, add 50 kg of water, and mix 0.2% of the caterpillar body fluid. Insects have an effect of more than 90%. 3. Treating pests with bacteria: The chelate fungus used to cultivate and propagate corn flour as the main medium prevents and controls greenhouse whitefly. 4. Heap trapping: The quail is plentiful under a thin layer of haystacks. The small haystacks with a thickness of 10-20 cm are placed evenly on the field in rows of 5 meters and 3 meters long. The grass will be collected and killed the next day; Put some poison baits under the haystack or use a wooden stick with a diameter of 3 to 5 cm to make a cave. 5. Yellow plate trapping: Aphids, whitefly, etc. have strong tropism towards yellow, yellow traps can be set to kill adults. Method: cut fiberboard or cardboard into 1 meter 0.2 meter long strips, painted orange yellow, and then coated with a layer of viscous oil (with a little oil and a little oil on the 10th mix), 32 to 34 pieces per acre, placed in line Between the bottom of the yellow plate and the top of the plant, the level is even or slightly higher. When aphids, whitefly, etc. stick to the board surface, it is necessary to recoat the viscous oil in time. Generally, it can be recoated once every 7-10 days.
Polyvinyl alcohol is a kind of organic compounds, chemical formula for [C2H4O] n, the appearance is white flake solid flocculent or powder, odorless soluble in water (95 above), dimethyl sulfoxide, slightly soluble in benzene, toluene insoluble in gasoline kerosene, vegetable oil dichloroethane carbon tetrachloride acetone, ethyl acetate methanol glycol polyvinyl alcohol is an important chemical raw materials, such as used in the manufacture of polyvinyl acetal resistant to gasoline pipe and vinylon synthetic fabric treatment emulsifier paper coating adhesive glue, etc.
Polyvinyl Alcohol Pva,Low Binder Requirement Pva,Low Ash Content Pva,Smooth Burn-Out Profile Pva
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