1, the number of frogs in farmland decreased sharply, which caused the increase of pest population to some extent;

2. The increase of pests leads to the increase of pesticide dosage;

3. The increase of pesticide dosage and unreasonable application make pests resistant, and the emergence of drug resistance promotes the continuous increase of pesticide dosage;

4. In this way, a vicious circle is formed, the farmland ecosystem is destroyed and the ecological environment is deteriorated, which leads to the decline of the quality and safety level of agricultural products, endangering human health and destroying the biological chain.

Frog:

Amphibians belonging to Chordata, Amphibia, Anura and Ranidae, adults have no tails, eggs are laid in water, fertilized in vitro, hatched into tadpoles, and breathed through gills. It is called frog after mutation. Adult frogs mainly breathe through their lungs and skin.