Bacterial diseases are a group of plant disorders caused by bacterial infections, such as soft rot, ulcer disease, and bacterial wilt. These diseases are typically caused by rod-shaped bacteria that possess one or more flagella, allowing them to enter plants through natural openings like stomata, lenticels, or water pores, as well as wounds. The spread of these pathogens is often facilitated by water, rain, insects, seeds, and contaminated soil. They thrive in warm and humid conditions, making them particularly problematic during certain seasons. Symptoms of bacterial infections include wilting, rotting, and leaf perforation. A key characteristic is the exudation of bacterial mucus from infected areas, especially under wet conditions.
These diseases significantly impact agricultural production in China. For instance, rice bacterial blight is one of the three major rice diseases, affecting over 10 million mu annually and causing yield losses ranging from 10% to 50%. Citrus canker is another serious issue, reducing both the quantity and quality of citrus fruits. Similarly, ginger bacterial disease leads to replanting issues, negatively affecting local economies in ginger-growing regions.
Currently, there are limited pesticide options available for controlling bacterial diseases compared to those used for fungal infections. Commonly used products include streptomycin, metilazole, and inorganic copper compounds such as copper hydroxide, copper sulfate, copper oxychloride, and cuprous oxide. However, their effectiveness is often limited, leading to the need for more advanced solutions.
Zhejiang Longwan Chemical Co., Ltd. has developed an innovative product called 20% Thiazole Copper (Longkei) Suspension Agent. This formulation, with independent intellectual property rights, has received numerous national and provincial certifications, including recognition as a key new product by the Ministry of Agriculture and awards such as the "National Technical Invention First Prize." It has also been included in several important national science and technology projects.
Thiazole Copper (Longkei) combines a thiazole group with copper ions, offering strong systemic absorption and dual protection and treatment effects. Its advanced formulation makes it cost-effective and user-friendly for farmers. Additionally, it is safe for humans, livestock, and beneficial organisms, ensuring environmental compatibility.
For effective control of bacterial diseases, the concept of "full-process medication" should be adopted. This involves applying the product at all growth stages—from seed to transplant and field—ensuring comprehensive protection against bacterial, soil-borne, and root diseases. Relying only on late-stage treatments may not be sufficient due to temporary symptom relief.
This pesticide is versatile, suitable for seed soaking, seedling drenching, soil disinfection, root dipping, field irrigation, and conventional spraying. It can be safely applied throughout the growing cycle without causing phytotoxicity, and it can be mixed with other pesticides without issues.
After eight years of research, the production process of this compound has become highly advanced, resulting in stable formulations like the suspension agent. Field trials have demonstrated its high efficiency, low toxicity, and safety as a thiazole-based copper bactericide.
The 20% Thiazole Copper Suspension is primarily used to manage bacterial diseases in crops such as bacterial leaf blight, bacterial leaf streak, cabbage soft rot, citrus canker, ginger rot, and cucumber bacterial leaf spot. It also shows efficacy against some fungal diseases, including citrus scab, watermelon wilt, and banana leaf spot.
Application rates vary depending on the target crop and disease. For example, a dilution of 500–700 times is recommended for most applications. In rice, 100g per mu is typically used to control bacterial blight and leaf blight. Seed soaking and field spraying are effective methods, especially in the early stages of disease onset.
For bacterial leaf spot prevention, a 500–700 times dilution is applied via spraying. To control Chinese cabbage soft rot, a 600-times dilution is used for irrigation, achieving up to 80% control efficiency. For citrus canker, the product is sprayed on young shoots and fruits at a 600-times dilution.
For soil-borne diseases like ginger bacterial infection, it is combined with seed soaking and irrigation. Root diseases are controlled using irrigation and foliar application. The product is most effective when applied at the initial stage of infection.
To ensure optimal results, a full-process application strategy is recommended, covering all growth stages and combining multiple application methods. It is not advisable to wait until symptoms appear before applying the product.
Thiazole Copper (Longkei) is an ideal solution for managing bacterial diseases. As a specialized agent, it offers a complete approach to disease prevention and control. Zhejiang Longwan Chemical Co., Ltd. is located at No. 6 Huangshan Road, Airport Avenue, Wenzhou City, Zhejiang Province (325013). Contact details: Phone, Fax, Email.
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