In the integrated pest control technical measures for the production of pollution-free vegetables, there is physical control. So what is physical control? In other words, the methods of trapping, killing, driving or killing diseases and insect pests using physical factors such as temperature, spectrum, color, sound, odor, and current apparatus are briefly described as follows:
First, the temperature, such as Lee (ten) high temperature kill bacteria on the surface of the seed or underground and shed indoor pests.
Such as warm soup soaking. Treat it with warm water at about 55°C for 10 to 15 minutes or for some seed coats with thicker grains such as beans, pick up in the boiling water for a few seconds and store it in the sun for no insects. Dry heat-treated solanes and melons at a temperature of 70°C can passivate the virus.
In summer, high-temperature stuffy sheds are used, that is, the soil in greenhouses is turned upside down. Closing the shed or covering the surface with a film in the open air allows the temperature in the shed and film to reach 70° C. or higher, thereby naturally killing the pests without pollution.
In rural areas, the traditional digging of earthworms, the use of branches and leaves, the weeding of barbecue soil, and the use of snow and ice in winter can also kill the pests in the soil.
Second, light uses different spectra, light waves to kill or kill pests, commonly used black light, frequency vibration lamp, ultraviolet light and so on. That is, by using the unique phototaxis of some insects, a certain number of lamps and lanterns are installed in the field to seduce and kill, such as the moths of Plutella xylostella, beetles, cotton bollworms, fleas, leafhoppers, cockroaches and other pests. Ultraviolet rays kill germs.
Third, electricity is mainly in the warehouse, the field with the low-voltage grid contact killing rodents, flies, mosquitoes and other harmful organisms, but it should be used with caution to prevent harm to humans and animals.
Fourth, the sound of the sound of some natural enemies in a certain time recording to drive away such as sparrows, rodents and so on.
Five colors use some pests to trap or drive different colors. For example: Covering tomatoes and peppers with a silver-gray film can drive away winged aphids, thereby reducing the risk of viral diseases.
Another example is the use of yellow plastic plates coated with viscous oils, which can trap and kill locusts, leafminers and white planthoppers that have a tendency toward yellow coloration.
Sixth, the taste of tigers, seed flies, etc. have a tendency to sweet and sour, can be used sweet and sour solution (according to sugar: vinegar: water 1:2:20) and then add 0.1% trichlorfon, placed in the vegetable field can trap its adult .
Adult bollworm, tobacco budworms like to inhabit spawning on poplar branches, and they can be inserted into the field by cutting into small branches of poplar branches. In the morning, the poplar branches can be collected and burned.
Yellow ants love to harm the rhizomes of the Solanaceae crop, while they evade the green onions. Therefore, a green onion or leeks can be planted next to the eggplant root, and yellow ants are afraid to harm it. In addition, ants like oil smell, can be used to kill the bones of cattle and sheep.
VII. Apparatus and manual capture
1. Insect Infestation Network In the areas where the southern pests are harmful, the use of insect-proof nets can be promoted, and it also has the function of blocking light and preventing rainstorms. The use of 24- to 30-mesh insect nets generally prevents the infestation of pests such as Plutella xylostella, Pieris rapae, Spodoptera litura, beet moth, and aphids and leaf miners.
2. High-fat liquid film The solvent made of high-grade fat is sprayed on the surface of vegetables in a certain ratio to form a protective film to prevent bacteria from invading the tissue. Such as: with 200 times the liquid can prevent tomato leaf blight and cabbage downy mildew; 50 times anti-Cucumber powdery mildew, etc., but also can improve the survival rate of transplanted seedlings, but also the role of cold resistance, drought.
3. Manual capture At the beginning of pests, some pests are exposed and can be caught manually. When some spawning eggs are concentrated or newly hatched, they should be promptly removed and destroyed by the insects, and they can be caught and killed by the mesh belt at the peak of adult migration.
Author: Yunnan Agricultural University
Surgical Gown
Surgical Gown,SMS Surgical Gown,Wood Pulp Spunlace Surgical Gown,Standard Surgical Gown
XINLE HUABAO MEDICAL PRODUCTS CO.,LTD. , http://www.golbaltravel.com