Bt, or *Bacillus thuringiensis*, is a broad-spectrum bacterial insecticide that effectively targets numerous pests, especially those belonging to the Lepidoptera order. One of its major advantages is its safety for humans, animals, and plants, as well as its non-harmful effect on beneficial insects and natural predators. Over the years, the global production and use of Bt have steadily increased. In North America, for instance, the area treated against gypsy moths has exceeded 1.3 million hectares, making up nearly 48% of the total controlled area. Similarly, Eastern European countries have been actively developing Bt-based insecticides to manage forest pests.
During China's "8th Five-Year Plan" period, significant progress was made in standardizing Bt products, bringing them up to international standards. The country now produces two main forms: microcapsule Bt raw powder and microcapsule suspension, both of which are effective against over ten types of agricultural and forestry pests, including pine caterpillars. These formulations show a noticeable insecticidal effect, with toxicity increasing by 20 to 30% when applied at rates between 1,500 and 2,250 grams per hectare. In 1997, the Ministry of Forestry recognized these developments as key results to be promoted.
As the world moves into the era of the knowledge economy and growing environmental awareness, the shift toward bio-insecticides is becoming increasingly inevitable. Traditional pest control methods based on chemical pesticides are being gradually replaced by more sustainable and eco-friendly alternatives like Bt. This transition not only helps protect ecosystems but also ensures safer agricultural practices for future generations.
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