Cockroaches are pests or beneficial insects.

Best answer: Cockroaches are pests. Cockroaches are second only to houseflies in harm to people, and sometimes they are even more annoying. It crawls everywhere on food, gnaws at clothes, paintings and calligraphy, and can be found everywhere, with bacteria all over its body. Because of feeding and crawling everywhere, it has a wide range of violations and a miscellaneous diet. It not only moves in garbage, toilets and washrooms, but also feeds on food. If it eats food contaminated by cockroaches, it may cause physical discomfort.

Cockroaches are pests. Cockroaches are second only to houseflies in harm to people, and sometimes they are even more annoying. It crawls everywhere on food, gnaws at clothes, paintings and calligraphy, and can be found everywhere, with bacteria all over its body. Because of feeding and crawling everywhere, it has a wide range of violations and a miscellaneous diet. It not only moves in garbage, toilets and washrooms, but also feeds on food. If it eats food contaminated by cockroaches, it may cause physical discomfort.

cockroach:

Male and female adults can mate about a week after emergence. Male worms can mate many times in their lifetime, but female worms only mate once or twice. Once mating, they can produce fertilized eggs in their lifetime. Female insects lay eggs in special glial cysts, forming egg sheaths (egg pods). Egg sheath is produced by female secretion, which is smooth, hard and waterproof, and can protect the development of embryo in it. The shape of egg sheaths, the number of egg sheaths laid by females in their lifetime, and the number of eggs contained in them are different depending on the species. Even the same cockroach may be different depending on the environmental conditions and nutritional status. Unmatched females can also produce egg sheaths, but generally cannot hatch larvae. However, some species such as Periplaneta americana and Periplaneta cankerata have parthenogenesis, that is, females can produce fertile eggs without mating. On March 13, 2017, the research team of Hokkaido University in Japan announced a new research result, according to which Periplaneta americana distributed in Japan can parthenogenesis without mating with males as long as there are more than three females.

Leave a Reply 0

Your email address will not be published. Required fields are marked *