According to the indoor measurement (1987), it can prey on 46 species of insects and many pests of cotton: tiger, cotton bollworm, cotton bridge builder, Ding Dian, Jin Gangzuan, Spodoptera litura, red bollworm, short-fronted locust, cotton aphid and so on. In particular, the cotton aphid preys heavily, and an adult Japanese salamander can prey on cotton aphid 179.20 every day on average, up to 275 at most.

The above comes from:

Deck worm _ Baidu Encyclopedia

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