CATDOLL : CATDOLL: What is the growth process of a cockroach?

What is the growth process of a cockroach?

Newly born cockroaches are white all over, small in size and wingless.

The nymphs that have just hatched from the egg case gather around the egg case in the cavity. They are white, and then gradually become darker in color and spread out. The nymphs are similar in shape to adults, but they are small, wingless, and have immature sexual organs. Nymphs develop slowly. They must undergo multiple moltings to gradually grow larger, and the number of antennae and cerci segments also increases with age.

After the nymphs molt for the last time, they grow wings and emerge as adults. Newly molted nymphs and newly emerged adults are also white, and the color gradually darkens. Therefore, within a population, a single species of cockroach can change depending on environmental conditions.

Additional information

Appearance and distribution of cockroaches

1. The body is flat, dark brown, and usually medium in size. The head is small and movable. The antennae are long and filamentous, and the compound eyes are well developed. The wings are flat, the forewings are leathery and the hindwings are membranous. The forewings and hindwings are basically the same size, covering the back of the abdomen; some species are wingless.

2. Not good at flying, but can run fast. Incomplete metamorphosis.

3. They lay eggs in egg sheaths. There are about 6,000 species, which are mainly distributed in tropical and subtropical regions and live in the wild or indoors.

Reference source: Baidu Encyclopedia - Cockroach - Growth Stage

Cockroaches are metamorphosing insects, and their entire life cycle includes three stages: egg, larva and adult.

Male and female adults can mate about a week after emerging from their pupae. Male insects can mate many times in their lifetime, but female insects only mate once or twice, and one mating can produce fertilized eggs for the rest of their lives.

Biologists once made a conclusion based on the ecological habits of cockroaches: If a global nuclear war breaks out on Earth one day, all creatures in the affected area, including humans and even fish, will disappear, and only cockroaches will continue their lives! This is because the radiation dose that the human body can normally tolerate is 5rems, and once the total radiation dose exceeds 800rems, it will be certain to die.

The German cockroach can withstand 9000~105000 rems, and the American cockroach can withstand 967500 rems! (Represents radiation dose. Rem dose equivalent rem (rem) sievert (Sv) 1Sv = 100rem) So even if there is a nuclear explosion, cockroaches can survive. The US government spends $1.5 billion a year to eliminate cockroaches, which is about twice the budget for AIDS prevention and treatment.

How do cockroaches grow?

The growth cycle of cockroaches is 45 days.

It takes about half a year to a year for a cockroach to grow to adulthood. If the growth environment is suitable, it may grow up in half a year. The body of the cockroach is flat, dark brown, and usually medium in size. The head is small and can move. The antennae are long and filamentous, and the compound eyes are well developed. The wings are flat, the front wings are leathery and the hind wings are membranous. The front and back wings are basically the same size and cover the back of the abdomen; some species are wingless. They are not good at flying, but can run fast.

Cockroaches are omnivorous insects that eat a wide variety of foods, including bread, rice, cakes, meat and vegetable cooked food, fruits and beverages, etc. They especially like to eat fragrant, sweet and oily flour-based foods. Cockroaches have a habit of eating fats and oils. Among various vegetable oils, sesame oil is the most attractive to them, so some places call them "oil thieves."

Cockroaches like to live in warm, humid, food-rich and cracked places, which are the four basic conditions they need for breeding. These conditions are generally found in buildings where people live and reside, so cockroaches have become health pests that harm thousands of households.

The love of warmth and humidity is the main habit of cockroaches. It is not difficult to find that no matter in restaurants, homes, trains or ships, the kitchen is always the place where cockroaches infest the most.