What are the different types of pests according to different mouthparts?

According to the different mouthparts, it can be divided into:

According to the different mouthparts, it can be divided into:

1) Chewing pests. Pests of chewing mouthparts feed on solid food and bite on various parts of plant tissues, causing mechanical damage. Such pests include locusts, armyworms, leaf beetles, leaf curling moths, moths, longhorn beetles, gidding insects, etc., which bite and burrow leaves and stems, causing the host plant to be incomplete.

2) Piercing and sucking pests. Pests of stinging and sucking mouthparts feed on the sap from plants or animals. Plant leaves infested by pests with stinging and sucking mouthparts such as bugs, aphids, leafhoppers and planthoppers often appear spotted or cause discoloration, shrinkage or curling.

3) Siphon pests. Pests of siphoning mouthparts can suck saps such as nectar, but cannot penetrate tissues, such as moths and butterfly pests.

4) Licking and sucking pests. Pests of licking and sucking mouthparts have a nose with a head and lower lip, and the lower lip surrounds the upper lip and tongue to form a food passage. There is a salivary duct in the tongue that secretes saliva that mixes with food or dissolves food, and can be inhaled into the lip flap through the food tract to collect the juice by capillary action.

Such as houseflies. 5) File and suck pests. File-sucking mouthparts are unique to thrips insects and can suck the sap of plants or mollusks, and a few species can also suck human blood.

Understanding the structure type of the pest's mouthparts can not only know the way the pest is harmed, but also has important significance for the correct selection of pesticides and reasonable application of pesticides.

The mouthparts of insects are generally divided into two categories: chewing and stinging. The pest of chewing mouthparts is to bite the plant into a notch, perforate or bite off and eat it up; The stinging and sucking mouthparts pest causes the branches and leaves of the plant to curl up to form galls or form discolored spots, or even wilt and die.

1. Pests with chewing Japanese instruments such as locusts, armyworms, corn borers and many beetles and butterflies, moth larvae, etc., because it bites and swallows plant tissues, stomach poisons such as trichlorfon, dichlorvos, etc. are sprayed on crops, or poison is mixed on what it likes to eat to make poisonous bait, and when the pests swallow it, they will be poisoned and die.

2. Although stomach poison is effective for pests of chewing mouthparts, it is ineffective against pests of stinging and sucking mouthparts, such as aphids, leafhoppers, and tsubaki elephants. Because this kind of pest is a medicine that is inserted into the plant tissue with a mouth needle to suck the juice and sprayed on the surface of the plant, it cannot enter the pest's gastrointestinal bridge and cause poisoning.

The control of chewing and sucking mouthparts pests is different in the choice of agents. The prevention and control of chewing mouthparts pests mainly uses pesticides with strong stomach toxicity and contact killing, such as malathion, pyrethroid and other insecticides; The prevention and control of stinging and siphoning mouthparts pests mainly uses strong systemic and contact pesticides, such as dimethoate, aphid mist, etc.

The mouthparts of insects include: one upper lip, one pair of large jaws, one pair of small jaws, one tongue (upper and lower pharyngeal tongues), and one lower lip. The mouthparts of insects are divided into five main categories:

Chewing, licking, stinging, licking, sucking, strawing. Among them, the chewing type is the most primitive, and the locust is the most representative; The other types have evolved from chewing. Among them, the sting-sucking, licking-suction, and straw-type mouthparts can be summarized together and are called absorbent mouthparts.

The stinging and sucking mouthparts are mainly represented by mosquitoes, the licking and sucking type is represented by flies, and the straw mouthparts are represented by butterflies. The difference in mouthparts is directly related to their living environment and eating habits.

Insects have different types of mouthparts due to the differentiation of feeding habits and feeding methods. Generally, insects that feed on solid food are chewing; Insects that feed on liquid food are absorbent; Insects that feed on both solid and liquid food are chewing and sucking; Suck surface liquids, insects are licking or siphoning. The study of insects with different types of mouthparts is of great significance for taxonomy, pest biology and pest control.

Chewing copy-type mouthparts are the primitive type of insect mouthparts, and its basic structure is composed of a piece of upper lip and a pair of upper lip

The jaw (large jaw), a pair of lower jaws (small jaws), a lower lip, and a tongue located at the bottom of the mouth.

The upper lip, flaky, is located at the very front of the mouthparts, and its function is to prevent food from leaking out of the front of the mouthparts; A pair of palates, which are hard, stubby, and have incisors (sharper) and molars (blunt and flat) on the surface, on either side of the posterior side of the upper lip, cut and ground food in opposing motions of the left and right palates; A pair of lower jaws is located behind a pair of upper jaws, and it has sharp teeth at the end, whose function is to hold food and assist the upper jaw in chopping food; The lower lip is flaky and located at the back of the mouthparts, whose function is to prevent food from leaking out of the back of the mouthparts; The function of the tongue is to taste and stir food.

The other mouthparts of insects evolved from chewing mouthparts. The main types of insect mouthparts are chewing, stinging, sucking, siphoning, chewing, licking, sucking, etc.

The gist of the answer: The mouthparts of insects are feeding organs. It consists of bone fragments of the head and three pairs of appendages. There are five main types:

1) Chewing mouthparts: It is the most primitive and basic type of mouthparts in insects. Including the upper lip, large jaw, small jaw, lower lip and tongue, the large jaw can grind, chew food, the small jaw must have the sense of smell and taste, and the tongue has the function of taste. For example, locusts have such mouthparts.

2) Piercing and sucking mouthparts: It is a kind of mouthpart that sucks liquid substances in the body of animals and plants. Its upper lip, large jaw, small jaw, and tongue become six mouth-shaped needles, which are hidden in the beak-like grooves formed by the lower lip, allowing them to be punctured and sucked. Such as the mouthparts of aphids and female mosquitoes.

3) Sucking mouthparts: mouthparts possessed by butterfly moths. It is mainly caused by the extreme elongation of the outer jaw lobes of the two small jaws and the intercalation into a tube, forming a food tract in the middle, except for the lower lip whiskers are still developed, the other parts of the mouthparts degenerate or disappear.

4) Licking and sucking mouthparts: mouthparts for flies. The large and small jaws are degenerate, but there are small jaw whiskers, the lower lip is elongated to form a beak, and the groove on the back of the beak is covered with a tongue and upper lip, and a food passage is formed to open and open.

5) Chewing and sucking mouthparts Huai Packer: It is the mouthpart of some bees, which has two kinds of poor functions: chewing and absorption. The upper lip and large jaw remain chewable and are suitable for chewing pollen, the small jaw and lower lip are extended into a tube, suitable for sucking nectar, and the outer jaw lobes of the small jaw are developed and knife-shaped, covering the middle lip lobe of the lower lip to form a food tract.

Due to the different feeding habits and feeding methods, the mouthparts of insects can be basically divided into the above five categories, and the eating habits of insects are extremely complex and different mouthparts are adapted to different eating habits. The way insects harm humans is inseparable from their eating habits, and it is of great significance to grasp the type of mouthparts for pest control, and different insecticides can be used according to different mouthparts. For example, gastric poison is used for chewing mouthparts, and pesticides such as systemic agents or contact killers are used for stinging and suction products, but pesticides with three functions of stomach toxicity, contact killing and fumigation (such as organophosphorus insecticides or pyrethroid insecticides) are suitable for either kind of mouthparts.