What are the specialties of locusts? What are the main characteristics of locusts?

Locust. The specialty is strong reproductive ability, large amount of food, rapid growth, good at flying, with chewing and suction mouthparts, can quickly cut off, chew plant stems and leaves. At the same time, this is also the reason why locusts are seriously harmful and prone to plague.

Locusts are characterized by a body that is usually green, gray, brown, or black-brown, with a large head and short antennae; The dorsal plate of the anterior thorax is stiff and extends to the left and right sides like a saddle plate, and the middle and posterior thorax heal and cannot be moved. The feet are well developed, especially the muscles of the hind legs are strong and powerful, and the exoskeleton is strong.

Hard, shins with sharp saw spikes, effective defense**.

The body surface of the locust has a hard exoskeleton, and its main role is to protect and support the soft internal organs and prevent the evaporation and loss of water in the body, which is one of the characteristics of adapting to life on land. The exoskeleton cannot grow with the growth of the locust's body, so in the process of locust growth and development, there is a phenomenon of shedding the original exoskeleton, which is molting.

Locusts have the characteristics of strong reproductive ability, large appetite, rapid growth, good at flying and living in swarms, and also have chewing and sucking mouthparts, which can quickly cut off and chew plant stems and leaves, which are also the reasons why locusts are seriously harmful and easy to become plagues.

Forefoot and midfoot – walking, hindfoot – jumping.

Two pairs of wings are leathery with forewings, and the hindwings are membranous. Forewings - protection, hindwings - flight.

The well-developed feet and wings make the locusts fly and jump well, expanding the range of locusts.

The antennae are filamentous antennae, and the segments of the whip are slender and have no special changes.

The antennae give the locust a keen sense of smell, giving it a wide range of feeding habits.

1. The body length of the male adult locust is millimeter, and the female adult is millimeter long. The body is usually green or yellowish-brown in color, and often varies due to environmental factors. The face is vertical, and the antennae are pale yellow.

The dorsal plate of the prothorax is well developed, the scattered type is slightly curved when viewed from the side, the group type is slightly concave, and there are often dark longitudinal stripes on both sides. The forewings are narrow and long, often extending beyond the middle of the tibial segment of the hind foot, with brown and dark markings, and the group type is darker. The hindwings are colorless and transparent.

The social form sometimes has 2 inconspicuous dark streaks on the upper side of the hind leg segments, and the dispersed form is often absent or inconspicuous. The hind tibial joints are usually orange-red.

The group type is slightly lighter, usually with 10 11 spines along the outer margin.

2. Locusts generally belong to facultative diapause insects, mostly overwintering in oocysts in the soil with eggs, and only a few species such as Japanese yellow-ridged locust and short-legged locust overwinter as adults. The number of generations that occur in one year depends on the biological characteristics of the species and the annual effective accumulated temperature, food, light exposure and growth and development of each insect stage in different regions. For example, the Asian locust occurs in one generation in one year in China's distribution area.

East Asian locusts. In China, the middle and lower reaches of the Yangtze River and its northern distribution areas are the second generation, and the Yangtze River and Huaihe River basins.

in high temperature and drought years, it is 3 generations or incomplete 3 generations; South.

4 5 generations. The Chinese rice locust has 1 generation in the Yangtze River and its northern areas, and the 2nd generation in the south of the Yangtze River.

1. Locusts have the structure and ability to adapt to migration, they can fly continuously for 1 3 days, fly at a speed of 6 12 kilometers per hour, and can fly freely at an altitude of 1000 1500 meters. Because the whole body of the locust is covered with a hard chitin shell, it is not afraid of wind and sun and can adapt to various external environments.

2. The locust has a hard chewing mouthpart under its head, which can quickly bite various crops. Locusts are addicted to bites, and they bite not only crops, but also books, clothes, etc. The locust's hind leg segments are particularly swollen, with well-developed muscles in the segments, and they are good at jumping, and the distance it leaps is equivalent to two-thirds of the distance of a human jump.

3. The ears of locusts are born on both sides of the first abdominal segment, which is half-moon-shaped, and the tympanic membrane is developed, with 60 80 sensory cells under each tympanic membrane, and there is also an air sac equivalent to a resonator on the membrane. When it flies, the ears are completely exposed, so the sense of hearing is very sensitive.