Question: The readers of Yanfei Township called and said that the silvery white streaks appeared on the back of the corn leaves he planted, and then the back of the leaves appeared like a layer of silver powder. Finally, the leaves were deformed and dried up and died. Ask what is this disease, how to prevent it?
Yan Jindong A: According to this reader, this is the hazard of corn and yellow horses. Corn stalks are the main pests in the corn seedling stage. Shandong, Beijing, Hebei and other places are harmful. Adults use a sucking mouthpart to scrape the epidermis of the corn leaf, insert the tissue with the mouthparts to absorb the juice, and the intermittent silvery white streaks appear on the back of the damaged leaves. The front part of the leaf has a yellow streak on the front part. Apply a layer of silver powder, the leaves are deformed, cracked, yellowed and dried, and died. Damage to the heart leaf often causes the heart to bend and deform. Huang Duo Hu Ma occurred on the corn for 2 generations, and at the end of May and early June, it harmed spring corn and interplanted corn. In the second generation from late June to early July, adult peaks appeared, mainly affecting interplanted corn and summer maize.
The yellow-streaked horses are hazard on the surface of the stretched leaves. The hazard period is mainly concentrated on the upper 2 to 6 leaves of the corn, and rarely shifts to the newly stretched leaves. The yield is generally reduced by 5% to 15%, and the weight is reduced by 35%. the above. From late May to early June, the climate drought occurred in a large amount, and the damage was heavy. On the contrary, it was light. The early sowing corn was more serious than the late sowing corn.
Control method:
1. Agricultural management: and time seedlings, seedlings, and the removal of the victim seedlings, centralized treatment. Strengthen field management such as fertilization to promote corn growth, resulting in an environment that is not conducive to the occurrence of corn and yellow thrips.
2. Chemical control; in the early stage of pests, use 48% chlorpyrifos 1000 times or 10% imidacloprid wettable powder 4000 ~ 5000 times or 70% imidacloprid wettable powder 4000 + fluflurin 1000 times or 5% pulp to kill 500 times or 40.7% chlorpyrifos (Lesburn) emulsifiable concentrate 1000 or 10% chlorfenapyr (depletion) suspension agent 2000 times or 5% cypermethrin 20 ml or 25% thiamethoxam WP 6 g and other drugs. Due to the large-scale use of chemical pesticides in the past few years, it is recommended that the majority of farmers' friends should use some chemical additives to prevent the use of chemical pesticides, which can achieve twice the result with half the effort.
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LLLT soft laser therapy device handheld laser therapy device for pain relief
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Handheld laser therapy devices, also known as low-level laser therapy (LLLT) devices or cold laser therapy devices, offer several benefits for various applications. Here are some of the key benefits:
1. Pain Relief: Laser therapy devices can provide effective pain relief by stimulating the release of endorphins, reducing inflammation, and improving blood circulation. They can be used to alleviate acute and chronic pain in conditions such as arthritis, sports injuries, back pain, and fibromyalgia.
2. Accelerated Healing: Laser therapy promotes tissue repair and regeneration by increasing cellular energy production. It helps to speed up the healing process of wounds, cuts, burns, and post-surgical incisions. It can also be used to treat skin conditions like acne, eczema, and psoriasis.
3. Non-Invasive and Non-Pharmacological: Laser therapy is a non-invasive treatment option that does not require surgery, injections, or medications. It offers a drug-free alternative for pain management, reducing the risk of side effects and drug interactions.
4. Easy to Use: Handheld laser therapy devices are portable and user-friendly. They can be used at home or on-the-go, allowing individuals to manage their pain or promote healing conveniently and independently.
5. Versatile Applications: These devices can be used for a wide range of conditions, including musculoskeletal injuries, nerve pain, joint pain, dental problems, skin disorders, and more. They are suitable for both human and veterinary use.
6. Cost-Effective: Compared to other treatment options, handheld laser therapy devices can provide cost savings in the long run. They offer a one-time investment, eliminating the need for ongoing medication or frequent visits to healthcare professionals.
7. Minimal Side Effects: Laser therapy is generally safe and well-tolerated. It has minimal side effects, such as temporary redness or warmth at the treatment site. However, it is important to follow the manufacturer's instructions and consult a healthcare professional if needed.
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