The life of a butterfly, what four stages of a butterfly s life go through

The growth process of a butterfly needs to go through four stages: fertilized egg, larva, pupae and adult, as follows:

1. Fertilized egg.

Different species of butterflies have different egg sizes, and they are usually laid on the foliage of plants.

2. Larvae. After the larvae hatch, they need to eat a lot of food, usually from the leaves of the plant, and go through several peels as they grow.

3. Pupa. After the larvae reach maturity, they use silk to fix themselves and become pupa, which is usually located in a relatively hidden place on the back of the leaves of the plant.

4. Adults. When the pupa matures, the butterfly emerges from the pupae. However, it takes a certain amount of time for the wings to dry and harden, after which they can fly freely.

Distribution:

Butterflies are distributed in all regions of the world, with the most species in the Neotropics, Indo-Australia, and African tropics. Among them, the neotropical region is mainly in the Amazon River basin of South America.

Most concentrated in this area of the rainforest.

The abundant vegetation is home to one-third of the world's butterflies.

Many beautiful and ornamental butterflies are also found in Brazil and Peru in South America.

and other countries. It is followed by the Oriental Zone and the Australian Zone, which are under the influence of the International Union for Conservation of Nature in the world.

Protected species, such as the golden-banded beaked butterfly and the bird-winged butterfly, are found in this area.

There are more than 2,200 species of butterflies in China and more than 2,500 species in India. There are only more than 450 species of butterflies in Australia. Papua New Guinea.

There are more than 1,200 species of butterflies. The third is the African Zone, where the lowland rainforests are home to more than 4,000 species of beautiful butterflies.

Butterflies have experienced a segment of their life: fertilized eggs, larvae, pupae and adults.

Eggs - (hatching) larvae - (pupation) pupa - (emergence) adults - migratory (perennial) - mating (seasonal) - laying eggs - dying

The larvae feed on plants, and the adults feed on nectar.

Onion is a two-year-old vegetable, and the growth and development cycle from seed sowing to harvesting new onion is roughly experienced in three growth and development stages: vegetative growth period, bulb dormancy period and reproductive growth period

1) Vegetative growth period.

It is from seed sowing and seedling, seedling growth to the formation and maturity of commercial bulbs, that is, product organs, and harvesting, and then through the seedling stage, leaf growth period and bulb expansion stage.

From sowing to emergence, the seedling plant height is 20 cm, the thickness of the false stem is centimeter, and the true leaves are 3 4 for the seedling stage, which lasts 50 90 days. The focus of this phase is to preserve the seedlings, cultivate the seedlings of the appropriate age and overwinter them safely. If the seedling age is too long, the plant is too large, which will lead to early budding, which will affect the yield and quality.

From seedling planting to early spring warming, onion roots and shoots successively transferred to the rapid growth stage, and the plant maintained 8 9 functional leaves for the leaf growth period of onion, which lasted 40 to 60 days (excluding seedling overwintering period). The center of cultivation management here is to make the onion form a certain number of leaves as early as possible, promote the vigorous growth of the aboveground part, and lay the material foundation for the rapid expansion of the bulb.

After the aerial part of the onion enters the vigorous growth period, the base of the leaf sheath slowly thickens, the bulb begins to expand, with the increase of temperature and the extension of sunshine time, the growth of roots and shoots stops, and the nutrients in the leaf body are quickly transported to the base of the leaf sheath and the scale bud, so that the bulb expands rapidly, until it matures, the leaf begins to wither, decay and lodging, and the nutrients in the outer layer of the bulb 1 3 layers of scales are also transported to the inner layer of scales, and the dry shrinks into a grassy shape, and the bulb can be harvested, this period is the bulb expansion period, which lasts 30 40 days. At this time, proper fertilizer and water management is used to accelerate the hypertrophy of the bulb.

2) Dormant period.

After the bulb is harvested, it enters the natural dormancy period, and the natural dormancy period of the onion is generally more than 60 70 days, and at the same time, the onion is artificially dried and stored to promote the forced dormancy stage, so as to prolong the ** period.

3) Reproductive growth period.

It refers to the female bulb used for seed collection, which is stored in summer and autumn, planted in autumn or spring, and flowered in the second spring under the long sun. Seeds mature in summer, which is the reproductive growth period, which lasts for 6 to 10 months. The key to its cultivation management is to ensure the safe wintering of the seeds through fertilizer and water management, and to make the flower sprouts grow strong and the seeds full.

Lodging is also prevented, and seed purity is ensured by segregation to prevent inter-species mixing.

Four stages, egg, larva, pupa, adult.

Butterflies throughout their lives go through egg larvae and barrel adults.

Fertilized eggs, larvae, pupae and adults.

The life of the butterfly goes through four stages: fertilized eggs, larvae, pupa and adult.

1. Characteristics of butterflies: thickened antennae at the ends, wide wings, and wings erect on the back when resting. The antennae of butterflies are club-shaped, and the ends of the antennae are stout and hammer-shaped. The body and wings are covered with flattened scaly hairs. The abdomen is elongated.

2. Butterfly habits: Butterflies are active during the day, and there are 18 families of butterflies in the 158 families of Lepidoptera. Adult butterflies feed on pollen and nectar; Some larvae are herbivorous and harmful to trees and crops. Some larvae eat aphids.

It's a beneficial insect. Butterflies have colorful wings, people often as ornamental insects, the total number of recorded butterflies in the world is 17,000 species, China accounts for about 1,300 species, and the number of butterflies is in the Amazon River basin of South America.

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1. Egg stage (embryonic stage);

2. Larval stage (growth period);

3. Pupal stage ** change period);

4. Adult stage (sexual stage).

The four stages of development form a circle of life, also known as a generation.

Butterflies complete a life circle of time hall only grandchildren, there are long and short, the short ones are dozens of days (such as the vegetable powder butterfly), and the elderly are nearly three years (such as the Northeast Asian silk butterfly). The number of generations that occur in the middle of the year often varies depending on the species. There are mountains and lands for one generation a year (such as Chinese tigers and phoenixes); There are also multi-generation ones (such as the vegetable powder butterfly), its generation often varies with the temperature in different places, they only have 2 to 3 generations a year in Heilongjiang, and as many as 5 to 6 generations in Guangdong.