At present, the quality standards for tea in the global market—especially for exports—are extremely high. When it comes to tea production, how can we effectively apply **biological pesticides** to enhance both the quality and safety of the final product? According to China Pesticide Network, here are some expert tips.
Currently, "non-polluting production" has been widely adopted in Chinese tea cultivation. The promotion of integrated pest management has significantly reduced the use of chemical pesticides. In tea farming, certain systemic and persistent pesticides are strictly avoided. Instead, low-toxicity, high-efficiency, low-residue, and environmentally friendly **pesticides** are encouraged. These include microbial pesticides and plant-based insecticides. Additionally, the concept of a safe interval for pesticide application is being strictly followed. Biological pesticides, such as microbial and plant-derived ones, are not only eco-friendly but also pose minimal risk to humans and animals, making them ideal for producing pollution-free, high-quality tea.
Here are two effective biological pesticides recommended for better results:
1) **Rotenone**: Also known as vine essence, this is a traditional plant-based **insecticide** with a long history of use. It breaks down quickly in the air, leaving little residual toxicity and causing no environmental harm. It has strong contact and stomach action against pests. With a broad spectrum of activity and a short duration (typically 5–6 days, even shorter in hot weather), rotenone is ideal for A-grade green tea production. It effectively controls tea caterpillars, leaf moths, and mites. For various types of thorn moths, apply 2.5% rotenone EC at a rate of 150–250 ml per 667 square meters, diluted 300–500 times and sprayed accordingly.
2) **Matrine**: Also known as oxymatrine, this is an alkaloid extracted from the roots of *Sophora flavescens* using organic solvents like ethanol. It degrades easily in the environment and leaves almost no residue. It is highly effective against tea black moth and tea caterpillar, especially during the first and second instar larvae stages or the egg-hatching peak. Apply 2% matrine AS at 50–75 ml per 667 square meters, mixed with 50–75 ml of water, and diluted 1000–1500 times before spraying.
Using biological pesticides wisely not only improves tea quality but also reduces environmental impact. The **pesticide network** strongly recommends their adoption for sustainable and safe tea production.
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