A general term for many species of Neuroptera, characterized by complex lace-like reticulated wing veins. The most common lacewings are green lacewings and brown lacewings. Green Chrysopa, sometimes called golden-eyed Chrysopa, is slender and light green. Antennas are long and filiform, and eyes are gold or copper. The front and rear wings are similar in shape and have reticular veins. Global distribution. Fly to the grass and bushes. It will give off an unpleasant smell to protect itself. Female insects secrete many filaments, and the eggs are laid at the top of each filament to prevent predatory larvae from eating the eggs that have not yet hatched. Larvae is called "Aphid Lion", with mouthparts like straws and developed feet. Chrysopa catch soft insects, such as aphids, and suck their liquids. Larvae feed continuously for two weeks, and a layer of pearl cocoon is woven on the back of leaves to pupate, and there is a pupation period of nearly two weeks before adults break out of their shells. Adults are probably 1? 1.5 cm (0.4? 0.6 inches). lacewing
Chrysopa fusca is an insect of Chrysopa, which looks like Chrysopa fusca, but it is small and brown, with brown spots on its wings, and does not secrete filaments when laying eggs. Some Chrysopa larvae use hooks and bristles on their backs to attach a lot of debris (including the remains of insects they eat) in disguise, so as to attack their prey and avoid being invaded by natural enemies.
Insects of Neuroptera usually include Ophiopogonidae, Pistachinidae and Nipponidae.
2. The long-winged cricket (also known as the yellow fly) is a small needle cricket belonging to Orthoptera, and its appearance is very similar to that of the golden fly. Because it grows in the grass, it is named Chrysopa. Because of its yellowish brown body color, it is also called grass yellow osprey. This insect is 5 ~ 6 mm long and belongs to Dendrolimus punctatus. Its tentacles are also very short, only 6~7 mm, and its two slightly upturned tails are obviously separated, such as figure-eight. The body belt is mottled, dark brown and pan-songkhla. Compared with the same kind of singing insects, it has a stout body, a short width, a slightly rectangular chest, a moderate head size, several straight lines on it, stronger legs and better jumping ability.
biography
Chrysopa is a completely metamorphosed insect, and its individual development can be divided into four stages: egg, larva, pupa and adult.
The adult feeding habits of Chrysopa lacewings have changed, such as Chrysopa lacewings in China and Chrysopa asiatica, which changed from carnivorous to herbivorous. They fly among flowers like bees and butterflies, and lacewings suck plant pollen and honey dew. At this time, they lost the ability to kill pests, while other species of Chrysopa stick to the habit of eating meat and still feed on pests, such as Chrysopa grandis and Chrysopa japonica, which can still eat more than 100 aphids on average every day. In China, Chrysopa Chrysopa has 1-4 generations a year, and some species can reach as many as 8-9 generations a year under artificial feeding conditions. The period experienced by each generation is different in different regions and seasons.
Chrysopa's eggs are special among insects. Except for a few species, most of them have long silk handles. The base of the stalk is fixed on the branches, leaves and bark of the plant, and the eggs are hung high at the end of the stalk. So the eggs of Chrysopa can often avoid the invasion of other insects. Some eggs are concentrated into dozens, such as those of Chrysopa grandis, while others are scattered separately, such as Chrysopa glabra and Ampelopsis. Other species are more than a dozen in a bunch. Eggs usually hatch in 3-4 days, and the newly hatched larvae stay on the eggshell for half an hour to 2 hours. After the body hardens and becomes solid in the air, they slide down the filament handle nimbly and dexterously. Female Chrysopa adults choose to lay eggs in places with dense aphids. As soon as the larvae hatch, they can immediately prey nearby. If there are no aphids around, fierce larvae will kill each other, so we should pay more attention to this problem in the process of artificially raising Chrysopa. Larvae generally has three instars and can grow and mature in about 10 days. After the mature old larvae stop preying, they spin silk from the tail to form cocoons and pupate. Cocoons are mostly formed on the back of leaves, under bark, wrinkled leaves, between branches and cracks in walls of plants. There are long and short pupation stages. If pupated before the overwintering period, the pre-pupation period of the overwintering generation can be as long as half a year. The pupal stage is only about eight or nine days. When they emerge, they push open a dome at the top of the cocoon with their heads and slowly climb out. After 2-5 minutes, they shed a transparent colloidal film in vitro. After about 10 ~ 15 minutes, after a whole body twisting and crawling, the transparent big wings slowly spread out. The digestive tract and rectum of grass-aged larvae are not connected, and feces accumulate in the body and are not discharged. When they emerge, the first thing to do is to eliminate the accumulated feces in their bodies. Adults feed mainly to supplement nutrition for sexual maturity. The nutritious food can be animals or plants. When adults are sexually mature, females and males begin to mate. Chrysopa only copulates 1 time, but can lay eggs many times. The total amount of eggs laid is considerable, for example, a female Chrysopa sinica can lay eggs 1237 in 5 days, and Chrysopa lilacinus can lay eggs 892. Chrysopa under artificial feeding conditions can further increase the amount of eggs laid if the light is prolonged. In summer, the body color of Chrysopa is mostly tender green, but in a few species that overwinter as adults, the body color often turns yellow in winter, and it turns green when the weather gets warmer, which is not caused by different species, but by different seasons. Chrysopa adults have strong phototaxis and are extremely sensitive to the change of day length. If the adult who has laid eggs is in short light, when she stops laying eggs, diapause will occur. If the conditions are not changed, this diapause can last for more than 2 months, but when the first light is prolonged, it can resume spawning immediately. On the contrary, adults will not diapause under long light conditions. Therefore, in the artificial propagation of Chrysopa, we often use the life characteristics of Chrysopa to give adults 16- 18 hours of long light every day, so that Chrysopa can lay eggs and reproduce all year round. /70 cffyinkgqfm 2 e 88 ium _ a/baike/ab pic/item/4762 17 F7 acab 7404730 EEC 05 . jpg
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