What are the harms of leafhoppers? What are the dangers of small green leafhoppers to people

Leafhoppers. It can harm a variety of grasses.

Crops and weeds, adults like moist leeward places, mostly concentrated in densely growing, tender green and juicy corn leaves, day and night sucking harm, in the corn tasseling and filling period serious harm.

Take nymphs. Adults suck the sap of new shoots and young leaves of plants, and when the density of insect population is high, there are often small white spots on the leaf surface that are connected together, so that the leaves fall in advance, which has a great impact on the observation and fruit production.

Pale white spots appear on the leaves, and when the damage is severe, the spots are plaque-like, or puncture the epidermis, causing the branches and leaves to wither.

Adults or nymphs are used to gather the leaves of the insects, sting and sucking the sap, destroying the chlorophyll.

Make the leaves out of scattered small white spots, and the degree of damage will not be aggravated in the future, and the spots will be dense to make the whole area green.

The large green leafhopper is harmed by adult and nymph sucking the sap of the branches, stems and leaves of the host plant, and is mainly harmed by adult oviposition on fruit trees. When the adult lays eggs in late autumn, the epidermis of the branch will be pierced with a saw-like ovipositor and raised in a crescent-like shape, and 6 12 eggs will be laid in it.

Adults and nymphs gather the leaves to suck the sap, and there are scattered small white spots on the leaves at the beginning, and the dense spots in the back make the whole leaves green, and most of the damaged leaves dry up and die when they are particularly serious.

Leafhoppers, insects of this family not only harm crops, but also transmit plant virus diseases.

Prevention and control methods. In winter, remove fallen leaves and weeds in the nursery to reduce the source of overwintering insects; Use a black light to trap and kill adult insects.

Sprayed deltamethrin wettable powder 2000 times, or 90% trichlorfon stock solution 800 times, or 50% pine borer emulsifiable concentrate 1000 times, veratroline wettable powder 600-800 times. When using drugs for prevention and control, attention should be paid to spraying from the periphery to the middle, and increasing the amount of pesticides in the middle part, and cleaning up the weeds around the field in time and spraying with drugs.

There is no harm to people, adults and nymphs suck the juice, and the yellow-white spots on the damaged leaves gradually expand into patches, and the whole leaves are pale and fall early when they are severe.

The small green leafhopper, also known as the small floating dust, belongs to the family Homoptera leafhoppers. Adults are long, pale yellow-green to green, compound eyes gray-brown to dark brown, no single eye, antennae bristle-like, black terminals.

Morphological characteristics. The adult body is 3-4 mm long, yellow-green to green, with a white stripe on the top of the head, an inconspicuous black spot on each side, and white streaks on the inner side of the compound eye and the green behind the head, and it is connected with the previous white stripe to form a mountain shape.

The forewings are green and translucent, and the hindwings are colorless and transparent. The ventral surface of the female adult is grass-green, and the ventral surface of the male adult is yellow-green. The eggs are about mm long, banana-shaped, slightly larger at the tip, pale yellowish-green, with l pairs of red eyespots in the later stages. Nymphs are similar in shape and color to adults except that their wings have not yet formed.

Harmless to people. Adults and nymphs suck the sap of buds, leaves and branches, and yellow-white spots appear in the early stage of the damaged leaves, which gradually expand into patches, and in severe cases, the whole leaves are pale and white, and the leaves fall early, and the tree is weakened. The insect droppings excreted by the insect body can contaminate the leaves and fruits, affecting the quality of the fruits.

Habits. The living habit occurs about 10 generations a year, and adults overwinter in the cracks of tree bark and weeds. The overwintering generation begins to be active in mid-March of the following year, and lays eggs in the main vein on the dorsal side of the leaf in early April. High temperature and rain are not conducive to the occurrence of this insect, and the peak period is from mid-June to mid-October.

After hatching, nymphs like to swarm and suck on the back of the leaves, and small green spots appear on the front of the affected leaves.

Cicadas are also known and widely distributed in China, and cicada shells are also a very good traditional Chinese medicine. Cicadas in the adult stage can fly, and they can only live for one or two months, and almost all cicadas have a short lifespan in the adult stage, which seems to be their fate. And the most important thing for them in the month or two is mating.

Usually the cicadas call at night are male cicadas, while female cicadas are mated by male cicadas after hearing the call, and they will insert a thin oviposition tube into a branch to lay eggs, and the larvae will hatch the next year.

The life of a cicada goes through three stages, the first stage is the cicada egg, the second stage is the nymph, and the third stage is the adult. Cicada eggs in the first stage will choose to hatch on the tree, and after hatching larvae, the larvae will fall into the soil and live in the soil for a long time. The second stage, the nymph stage, usually at the end of the nymph stage, the cicada will crawl out of the soil, but it only comes out at night to be active, and then they will shed their shells on the tree and enter the adult stage.

The lifespan of a cicada that enters the adult stage is only one or two months, but it can stay in the soil for a period of time, usually for a year or three or five years. They are all prime-numbered years to stay in the dirt in order to avoid predators.

The cicadas in the adult stage will choose to come out at night to metamorphose the cicada shell, they will grab the bark and climb along the bark to a high place, because the degenerated cicada can not be disturbed, once disturbed, it will fail to metamorphosis, and the transformed cicada will not be able to fly, and it will take a period of time before the wings can fly to the sky after the color of the wings deepens. The movement of the cicada is very slow, it is the food of many animals, as long as they are hungry and when the cicadas come out, many animals have the opportunity to eat a full meal, and the cicadas are not extinct, purely because of the large number.

Cicadas are harmless to humans and many animals, but cicadas can destroy many trees, and cicadas feed on the sap of branches in both the nymph and adult stagesYou can imagine how many branches of sap they would suck up if a group of dense cicadas came, which led to the death of many trees. So there is nothing wrong with planting more trees, so that you can protect the ecological environment, maintain the ecological environment, and at the same time purify the air.

1. May gain weight.

The fat content in the golden cicada is 15%, and most people eat the golden cicada is fried, so the calories of the golden cicada are a little high, and if you eat too much and lack exercise, you will be easy to gain weight.

2. This slag can be on fire.

The golden cicada is usually fried and eaten, so that the fire is greater than that of Sen Zhao, and it is easy to catch fire if you eat too much.

3. May have indigestion.

The nutritional value of the golden chain cicada is very high, and it is easy to overnourish, indigestion, bloating, diarrhea and other conditions if you eat too much.