What are the advantages of using Bt to control forest pests? What are their application prospects?

Bt is a broad-spectrum bacterial insecticide that can control hundreds of pests and is particularly effective against Lepidoptera pests. And for human and animal safety, there is no harm to the plants and does not harm natural enemies. At present, foreign production and application of Bt have increased steadily year by year. The area of ​​North American anti-gypsy moths has reached more than 1.3 million hectares, accounting for 48% of the actual control area. Eastern European countries have also focused on the development of Bt insecticides to prevent forest pests. During the “8th Five-Year Plan” period, China achieved product standardization and achieved product standardization. In general, it has reached the international advanced level. Two types of microcapsule Bt raw powders and microcapsule suspensions have more than 10 kinds of agricultural and forestry pests such as the pine caterpillars. With obvious insecticidal effect, the toxic effect was increased by 20 to 30% when the dosage was 1500 to 2250 g/hm2. In 1997, the Ministry of Forestry identified it as a key promotion result. In short, due to the arrival of the era of the world's knowledge economy and the environment, it has become inevitable that bio-insecticides have replaced control technologies based on chemical pesticides.

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