Scarab is the general name of scarabaeidae insects, belonging to invertebrates, Insecta and Coleoptera. There are about 30,000 species in the world and about 1 1,300 species in China. Can be found on continents other than Antarctica. Different species live in different environments, such as desert, farmland, forest and grassland.

The adults of scarab are commonly known as chestnut worm, yellow worm, blind stinkbug (Lunan) and light tiger, and the larvae are commonly known as grubs, ground silkworms and ground dogs. They are about 3 ~ 4 cm long, with white body color, yellow-brown head, hard mouth and often bent into horseshoe shape.

Overwintering as larvae and adults. Scarabs are divided into two types: nocturnal type and sunrise type. Nocturnal type is harmful to feeding at night, with different degrees of phototaxis, and sunrise type takes the initiative to feed during the day.

Extended data:

Some scarabs are omnivorous pests. It is the main underground pest, eating the underground parts of plants such as roots and tubers or seedlings. Harm the aboveground parts of plants such as leaves, flowers, buds and fruits.

Adults bite the leaves into reticular holes and notches, leaving only the main veins in severe cases, which is more serious when they are clustered. Biting is the most popular from evening to 10 pm. It not only harms pear, peach, plum, grape, apple, citrus, wheat, millet, potato and other crops, but also harms willow, mulberry, camphor, privet and other trees.

Adults have different feeding habits, some feed on plant roots and leaves, some feed on rotten organic matter, and some feed on feces. Most larvae live in the soil and feed on organic matter in the soil.