Leek maggots are the most common, most harmful, and most difficult underground pests on leek. In the past, in order to effectively prevent the harm of leek maggots, a large number of highly toxic and highly toxic pesticides were used, such as formazan, chlorpyrifos, and phoxim, Often cause a lot of pesticide residues. Recently, the "Key Technology Innovation and Application of Green Control and Control of Major Vegetable Pests, Leek and Maggot", developed by the Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, won the second prize of the National Science and Technology Progress Award. You can kill all leeks without pesticides. Let's take a look at this green method of preventing diseases and insect pests.

Control time: Generally in the late spring or summer and autumn season when the temperature is high, choose continuous sunny weather to increase the temperature quickly to achieve the purpose of killing pests.

Cutting off leeks: In order not to let the leaves of leeks be shaded and affect the temperature of the soil irradiated by sunlight, the tall leeks can be cut off along the surface before mulching, as far as possible.

Covered with shed film: A light blue non-drop film with a thickness of 0.10 to 0.12mm is covered on the cut surface of the leek, and the surroundings are tightly sealed to prevent the heat from escaping.

Uncover the film and let the air out: raise the ground temperature of 5 centimeters in the furrow to above 40 â„ƒ for 3 hours, you can basically kill all the leeks in the underground, then you can open the plastic film for ventilation.

Watering to promote seedlings: After peeling off the film, watering should be carried out in time to promote the sprouting and growth of leeks. Generally, about 20 days later, the leeks fully resumed growth and are completely consistent with other leeks.

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Cosmetics Materials

Analysis of the direction of the application of cosmetic raw materials

Plant extracts are widely used in cosmetic ingredients. The use of plant extracts in cosmetics can help improve the texture, appearance and health of the skin. The functional applications are as follows:

1. Anti-oxidant Raw Material: Many plant extracts have antioxidant properties that can help protect the skin from free radical damage. For example, green tea extract, grape seed extract and vitamin C are common antioxidants.
2. Moisturizing Raw Materials: Many of the ingredients in plant extracts have moisturizing properties that help the skin retain moisture. For example, aloe vera extract, hyaluronic acid and glycerin are common moisturizers.
3. Anti-inflammatory agents: Some plant extracts have anti-inflammatory properties that can reduce skin inflammation and redness. For example, chamomile extract and tea tree oil are widely used to treat inflammatory skin problems.
4. Whitening And Clearing Speckles Raw Materials: Some plant extracts have a whitening effect and can reduce melanin deposits in the skin. For example, lemon extract, arbutin and tyrosine are commonly used whitening agents.
5. Anti-aging And Anti-wrinkle Raw Materials: Some plant extracts are rich in anti-aging ingredients, which can reduce wrinkles and fine lines in the skin. For example, grape seed extract, soy isoflavones and collagen are common anti-aging agents.

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