In order to maintain the ecological balance of the farmland and the environment from pollution, according to our many years of practical experience, we have taken comprehensive agricultural technical measures. That is, agricultural control is the mainstay, supplemented by physical equipment control, biological control, chemical control and forecasting. 1 Agricultural Prevention and Control Agricultural control is the basis for creating environmental conditions conducive to the growth of vegetables that are not conducive to the occurrence of pests, and to maintaining a good ecological balance in farmland. 1.1 Breeding of disease-resistant pests and breeds In the direction of breeding, breed high-yielding, high-quality pest-resistant varieties and enhance plant resistance, thereby reducing the frequency of application, reducing costs, and reducing pollution. 1.2 Timely sowing Reasonable mastering of sowing time to avoid pests during the peak period, staggered for the Chinese cabbage in the true leaf stage of 2 to 4 and moth peak, thereby reducing the hazard. 1.3 Rational crop rotation and intercropping use crops with distant genetic relationship to implement crop rotation, intercropping with onion and garlic and cruciferous vegetables to reduce pest population. 1.4 intensive cultivation for deep plowing, thickening tillage layer, deep ditch sorghum, conducive to irrigation drainage, irrigation is best to use sprinkler irrigation or drip irrigation, rainy days to prevent accumulation of water. 1.5 Scientific fertilization Rational fertilization can improve the plant's nutritional conditions and increase plant resistance to pests and diseases. Should be based on farm manure organic fertilizer, with phosphorus and potassium fertilizer, apply enough base fertilizer, diligently apply top dressing, suitable for chemical fertilizers, combined with foliar spray fertilizer, to prevent the use of unripe fertilizer. 1.6 Cleaning Pastures The leaves of the old crops of the vegetables after the last harvest should be cleaned up in time and plowed in time to reduce the breeding sites of pathogenic bacteria and cabbage butterflies. 2 Biocontrol biological pest control is the development direction, which is beneficial to beneficial insects and microorganisms in the natural world to prey or parasitize the pests, thereby reducing the number of pests. Both eliminate pests and reduce pollution. 2.1 The predatory natural enemies of the natural enemies of locust protection include more than 10 species such as ladybugs such as ladybugs, ladybirds, ladybugs, green hoppers, grasshoppers, grasshoppers, and florets. Parasitic natural enemies are cricket bees, microbial predators such as maggots. There are also many natural enemies of the cabbage whitefly and the moth, and there are more than a dozen known species such as Trichogramma species, Trichogramma californica, Trichomopsis punctatus, M. villosa, and Gypsy moth. Predatory natural enemies have flower buds in the egg stage, and there are wasps and gnat insects during the larval stage and pupa stage. Protecting natural enemies can have a multiplier effect. Therefore, pesticides should be used with high efficiency, low toxicity and low residual pesticides, and they should not be arbitrarily increased in dose and concentration so as to ensure safe survival and reproduction of natural enemies and increase their population. Helps humans kill pests, inhibit the growth and development of pests, and reduce pest damage. 2.2 Biopesticides Biological pesticides include acaricidal powder, adult powder, Bt Cainon No. 2 300-400 times; Bacillus thuringiensis WP 1000 times; Pesticide WP 500-1000 times; 24.5% A worms Kendo's EC is 3000 times; the virgin virgin 311, 312 and other agents of the genus Bacillus are effective in killing pests, protecting natural enemies, and not contaminating vegetables. 3 Physical equipment prevention and control utilizes the phototaxis and chemotaxis of pests, and is controlled by physical devices. It is labor-saving, cost-effective, simple, and efficient. 3.1 Light trapping In the emergence period of adult moths such as Plutella xylostella, Brassica juncea, and Spodoptera litura, light trapping was used. That is, a 20W black light is installed for every 10 mu of vegetable plots. The time is from the middle of September to the middle of November and the other is from the middle of April to the beginning of June. It can be used to kill adult worms, larvae, Spodoptera litura, Spodoptera litura, Brassica napus, Spodoptera exigua, and Moth. The effect is very good. 3.2 Sex trapping and killing 3.2.1 Trapping traps with live female moths 2 to 4 unhatched female moths were placed in small cages made of nylon gauze and hung above the basin. 500 male moths. This method is simple to produce, easy to operate, low cost, good effect, easy to promote. 3.2.2 Trapping the male adult with a crude extract The 10 to 20 female female moths were abdomen-removed with a methylene chloride solution. The method is to use a large diameter water bowl filled with water, add a small amount of detergent, and then take a piece of 5cm5cm absorbent paper, rolled into a paper core, the middle wear wire hanging above the water basin 1cm away from the surface of the water, the core activity of the paper drop The crude extract of 5 to 10 drops of the attractant was placed every evening and was recovered early in the morning. The effective range of a basin attractor is about 100m radius. Can be used continuously for about 10 days. In the adult eclosion period, over a thousand moths can be induced overnight. The existing synthetic moth attractant is easy to use and contains 50 μg per core attractant, with an effective period of up to 1 month. This method has low cost and good effect and must not be lacking. 4 Chemical Control 4.1 Control Aphids are generally sprayed before the growth stage or before planting ridges. Can be used 40% Dimethoate 1000 ~ 2000 times or seed weight of 1/4 of 40% dimethoate EC seed dressing, efficacy can be maintained for about 20 days; 10% Querchong oil 6000 times liquid; 50% Xin enemy Emulsion 2000 to 3000 times liquid; 10% cypermethrin 2000 times (need to be harvested after 10 days of spraying); 20% vegetable worm Pa 1500 to 3000 times liquid; 90% Kuling WP 3000 to 5000 times; % 螨 Superstar 2000 ~ 3000 times liquid and so on. 4.2 The control of cabbage caterpillar, moth, cabbage borer, Spodoptera litura and other pests can use high efficiency, low toxicity and low residual pesticides, the time of application should be before the larvae 3rd instar, cabbage before the heart. Use 90% of trichlorfon powder 1000 times; 5% of Fermented milk 2000 to 3000 times of liquid; 5% of Sodium alcohol; 1000 to 2000 times of liquid; 5% of stuck oil of 1000 to 2000 times of liquid; 20% Insecticide urea suspension 5000 to 7000 times liquid; 50% Xin enemy emulsion 2000 to 3000 times liquid; 25% sangli 1th emulsifiable oil 1000 to 1500 times liquid; 30% insecticidal king emulsion oil 1000 times liquid; 25% Bosha enemy 4000 ~ 7000 times liquid. When used on more waxy cabbages, detergent powder should be added at 0.2% of water to increase adhesion to improve efficacy. Vegetable pests are resistant to chemical agents, and different pesticides need to be replaced. Can also be mixed with microbial pesticides. Spraying should strictly control the amount of medication and the amount of water, must be harvested before the expiration of the drug market. 5 Establishment of Forecasting and Forecasting System City and county-level agricultural departments and vegetable cultivation areas should set up stations for forecasting and reporting, and special personnel should be responsible for observing, recording, counting and analyzing the occurrence and development patterns of major pests and diseases of major vegetables, and timely reporting and reporting to guide farmers and farmers in time. , use drugs precisely to reduce blindness.
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Posterior Spinal Internal Fixation include Pedicle Screw,Cage,rod,crosslink
Used in posterior spine.
It's Spinal Fixator.
Posterior Spinal Internal Fixation
Posterior Spinal Internal Fixation,Spinal Fixator
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