How many kinds of locusts are there?

1. Oxytropis beige

Appearance characteristics: body length ♂2 1~3 1mm, ♀ 26 ~ 39 mm. The back of the body is grayish brown; The abdomen and feet are green. Ecological habit: This species is a very common locust between the flat land and grassland in low altitude areas. Adults can be seen almost everywhere except in winter. Mainly feeding on leaves of Gramineae plants, it is the main pest in early rice. Living environment: flat area and low altitude area < below 800 meters >. Living environment: grassland environment. Feeding habits: herbivorous insects, including plant parts and rotten fruits. Activity time: daytime insects.

2. Locusts in East Asia

It belongs to Insecta, Orthoptera and Acridoidea. According to statistics, there are 223 genera and 859 species of Acridoidea. Locusta migratoria manilensis grows at natural temperature and has two generations a year. The first generation is called summer locust and the second generation is autumn locust. Nowadays, artificial breeding can change four generations a year. The migratory locust has six legs; The body is divided into three parts: chest and abdomen; There are two pairs of wings in the chest, the front wing is horny and the back wing is membranous. The body is yellowish brown, and the male is bright yellow when mating. The female locust is 39.5 ~ 5 1.2 mm long, and the male locust is 33.0 ~ 4 1.5 mm long. Adults are good at jumping and flying. Locusta migratoria manilensis has strong body, wide feeding range and strong adaptability. After hatching into young locusts, they can be raised for 35 days and sold after fattening for about 50 days, so the time is short and the return is quick. Feeding 1000 adults of Locusta migratoria manilensis can reach 20 kg, with considerable economic benefits, and seeds are only purchased once. Self-reproduction dozens of times, eggs hatch locusts, locusts lay eggs, cycle after cycle, raising for many years, constantly selling money, a female locust can lay more than 35 ~ 90 eggs at a time. The reason why migratory locusts are favored by people is that their meat is soft, tender and nutritious. According to experts' analysis, its protein content is as high as 74.88%, fat content is 5.25%, carbohydrate content is 4.77%, and it contains 18 amino acids and various active substances. Morphological characteristics: the female adult is 39.5-5 1.2 mm, and the male adult is 33.5-4 1.5 mm, yellow-brown or green. Antennas are filiform, mostly pale yellow, with compound eyes 1 and 3 pairs of monocular eyes. There are light stripes after compound eyes, and dark stripes at the front and bottom. The chest backboard is saddle-shaped with well-developed protuberance. The front wings are developed, often exceeding the middle of the hindfoot intestine, with dark stripes and luster. The hind wings are colorless and transparent. The medial base of the hind leg joint is black, the proximal end has a black ring, and the hind leg joint is red. Affected by field environmental conditions, it often forms two categories: gregarious type and dispersed type. The egg is about 6.5mm long, light yellow, cylindrical, slightly pointed at one end and slightly round and curved at the other end. The egg mass is brown, cylindrical, 53-67 mm long, slightly curved, slightly thin at the upper part, covered with spongy gum, and arranged at the lower part. Nymphs, also known as locust pupae, are similar in size to adults. ***5 years old. Living habits in Beijing, Bohai Bay, the lower reaches of the Yellow River and the Yangtze River Basin are two generations a year, and three generations occur every few years; Guangxi, Guangdong and Taiwan Province provinces have three generations a year, and four generations can occur in Hainan. Locusta migratoria manilensis has no diapause, and overwinters in soil with eggs all over the country. In the second generation areas such as Shandong, Anhui and Jiangsu, the overwintering eggs hatch into summer locusts from the end of April to the first half of May. After 35-40 days of emergence, they mate on 10 for 7 days to lay eggs, and the egg period is 15-20 days, and they enter the peak spawning period in the first half of July. The hatched nymph is called autumn pupa, which becomes autumn pupa after 25-30 days of emergence. After living 15-20 days, they began to mate and lay eggs again, and began to overwinter after entering the peak of laying eggs in September. There were several years of high temperature and drought, and three generations of locust pupae hatched from August to late September of the following year. Most of them froze to death in winter, and only a few of them could emerge as adults to lay eggs for the winter. When adults lay eggs, they have obvious selectivity to topography, soil properties, soil surface firmness and vegetation. Each female locust usually lays 4 or 5 egg blocks, each egg block contains about 65 eggs, and the adults of migratory locusts feed almost all day. When the density of migratory locusts is low, they are scattered, and when the density is high, individuals are interrelated and can gradually gather into a social type. Social migratory locusts have the habit of long-distance migration, which mostly occurs 5- 10 days after emergence and before sexual organs mature. The migration in the air can last 1-3 days. As for scattered migratory locusts, when there are more than 10 insects per square meter, sometimes there will be migration. Social migratory locust has high fat content, low water content and strong fluidity, but few ovarian tubes and low egg production. The decentralized type is the opposite. Locusts like to inhabit beaches or lakes with low terrain, easy waterlogging and drought or unstable water level, as well as large areas of wasteland or uncultivated wasteland, and are mainly herbivorous plants such as low reeds, thatchs, salt reeds and sedges. In case of drought, the wasteland increases with the shrinking water surface, which is beneficial to the growth of locusts, and the area suitable for the growth of locusts increases, which is easy to cause locust disasters. Therefore, attention should be paid to the prevention and control of locusts in every dry year. Natural enemies include parasitic bees, parasitic flies, birds and frogs.

3. The Red Queen bears locusts

Orthoptera negative locust family male is 20-25mm, female is 34-42mm. The body color is pure green or brown; The head is long and sharp, with small white protrusions on the head, chest and feet, commonly known as "pointed grasshopper"; The wings are red when flying. It is the most common negative locust in China. Adults can be seen all year round, living in the grass on the edge of the forest in flat to medium altitude mountainous areas. Adults can bite all kinds of green plants, often causing many irregular holes in the leaves of plants. This grasshopper jumps better than flying, and its protective color is excellent, so it is not easy to be found.

4. Locusts in Taiwan Province Province

The locust in Taiwan Province Province is different from the oriental migratory locust, and the locust in Taiwan Province Province is the largest locust in Taiwan Province Province, especially the female locust can reach 8 or 9 cm in length. In terms of ecological habits, no matter what kind of locust it is, it can't be regarded as a fierce locust. However, for those who have tried to catch locusts in Taiwan Province Province with their bare hands, they have a different experience, because there are sharp thorns behind the thick red knuckles on the hind feet of locusts in Taiwan Province Province; When it is caught, it will kick its foot back violently. For children with delicate skin, if you want to scratch them with your hands, it is likely to sting your fingers or palms and even shed small blood drops! The biggest feature of grasshoppers is that they have developed hind legs, which are suitable for long-distance jumping and can easily jump on their bodies ... Grasshoppers are commonly known as grasshoppers, which are widely distributed in Taiwan Province Province, and adults mainly appear in autumn, but they can be seen in southern winter or even the next spring. This species is a first generation insect, mainly distributed in low altitude mountainous areas. In autumn, the female worm slowly dies after laying eggs on the surface, and the oocysts spend the winter underground, and begin to hatch in the next spring. The hatched larvae are Gramineae, Leguminosae and other plants.

5. Rice grasshopper

It is 2.2-3.5 cm long, with a wide black belt from the back of the compound eye to the tip of the wing, slender body and black spots on the tentacles. Lotus leaves are their bite marks and their masterpieces, picturesque and gorgeous.

6. Oxya formosana

Appearance characteristics: male body length is 265,438+0 ~ 365,438+0 mm, female body length is 24~39mm, the back is grayish brown, the abdomen and feet are green, and the body color is quite different, which will be similar to the habitat and form protective color. Ecological habit: Oxytropis Oxytropis is a very common locust in flat land and low altitude areas, which can occur for two generations a year. The reason why locusts move in groups is mainly because they need high temperature to stay together for warmth. Adult hind limbs and legs have a series of mastoid processes equivalent to elastic devices, and the base of radial veins of anterior wings has thick veins equivalent to chordal devices. When they rub, the vibrating area of the vibrating wing can make sound, which is their sounder. The auditory organs of locusts are also very special, Taiwan rice locust.

Located on the side of the first abdomen. According to the living habits of locusts, they can be divided into migratory and non-migratory types. These two kinds of locusts are very threatening to crops, especially the former is very destructive. As long as they cross the border, all green plants will be eaten up. The shock caused by the plague of locusts is really flattering. Its diet is very diverse, eating all kinds of green plants, especially Gramineae plants. Nymphs, also called locusts, look like adults, but only have wing buds (can't fly) and are good at jumping. It takes four or seven times to become an adult who is good at jumping and flying. Some locusts have short antennae and short ovipositor tubes. At present, there are about 5000 kinds of locusts in the world. The longest part of a locust's body is its hind foot, which is almost the same as its body length. It can jump out of its body eight times as long in one jump. The hind foot of a locust is also its best musical instrument, and it can make a sound by rubbing its wings. Classification: All insects belonging to Acridoidea in Orthoptera. Species: There are about 12000 species in the world, and there are more than 100 species in Taiwan Bay. Life history: egg → nymph → adult. Appearance: Commonly known as grasshopper, Taiwan Province people call it grasshopper. There is a folk song "Cao Meng Teases the Rooster", and the lyrics depict the scene of this little insect and the rooster teasing each other, which is a common picture in the early rural areas of Taiwan Province. Locust crossing the border is a familiar idiom. Feeding habits: herbivorous insects, most of which are not particularly picky eaters. Substitution: Oxytropis, accustomed to inhabiting wet and bare ground, mainly feeds on bryophytes. Habitat and protective color: it has typical protective color, excellent stealth effect in the grass, strong hind feet and good bounce, which is their usual way to avoid the enemy in crisis. Mating behavior: Compared with other insects, mating time is longer. Therefore, it is not uncommon to see photos of the woman and the man and husband and wife files.