What are the two types of insect mouthparts that harm garden plants, and what are the characteristic

<> the growth process of garden plants has been plagued by pests and diseases, pesticides are often used in the past pest control work, but there is no strict control of pesticide quality and dosage, the awareness of comprehensive prevention and control is relatively lacking, resulting in the pest control effect is not ideal, some pests and diseases appear repeatedly, but also pollute the atmosphere, soil and water environment, endanger urban residents.

of good health.

1.Pests and diseases are diverse

At this stage, some cities are too aesthetically pleasing, ignoring plant growth habits, blindly introducing exotic varieties, and wantonly matching different kinds of plants, so that the types of pests and diseases increase significantly, and the phenomenon of cross-infection occurs frequently, and it is difficult to control the problem of pests and diseases in a targeted manner, and the technical means used cannot be effective. Once the outbreak of pests and diseases spreads in a short period of time, it will quickly infect the surrounding healthy plants, causing disease in the roots, stems and leaves of plants, decaying plant communities, and greatly reducing the ornamental value.

2.The harm lasts for a long time

Transplanting plants into city streets and parks, using artificial means to intervene in plant growth, resulting in these garden plants being less resistant than naturally growing plants, plus high-rise buildings.

Blocking, automobile exhaust pollution, etc., will slow the growth of garden plants, and the probability of pests and diseases is higher. The suddenness and concealment characteristics of pests and diseases determine that when garden plants are eroded by pests and diseases, it takes a long time to be discovered, and the best treatment time is missed, and garden plants continue to be harmed.

3.Stubbornness of pests and diseases

In fact, some stubborn pests and diseases are difficult to be completely eliminated, and garden plants are frequently attacked by pests and diseases during the growth period, and the growth state is poor and the mortality rate is achieved.

On the high side. This requires the use of advanced instruments and equipment for the maintenance of garden engineering to dynamically monitor the growth of plants, and detect pests and diseases as soon as possible, otherwise the recalcitrant pests and diseases will cause damage to the plant growth system, cause disease and death of plants, affect the play of plant functions, and reduce the overall benefits of garden engineering.

In garden plants, the biggest characteristic of the occurrence of pests and diseases is the development of spreading. Once pests and diseases occur, they will spread to the entire garden in a short time. So be sure to pay attention to prevention.

Generally, the growth rate is relatively fast, the spread rate is relatively fast, and there are more types of pests and diseases, which will affect crops and soil.

Answer: In some green spaces, the garden plants are of single species, densely planted, and pests and diseases are easy to spread, so it is difficult to control them. Cities are densely populated and are not suitable for conventional, polluting pest control methods.

Resulting in incomplete plant mutilation.

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.

This type of pest mainly pests pests infest peppers by feeding on plant mesophyll, flowers, stems and other tissues. It mainly uses mouth needles to pierce into the leaves, flowers, shoots, stems and other tissues of flowers to absorb the juice. The appearance of the affected flower does not cause mechanical damage, but it will form fading spots on the damaged area.

In severe cases, it will cause deformities such as leaf shrinkage and curling, insect fistula, etc., which will affect the normal growth and development of flowers and plants, and even cause plant death.

For the growth of plant stems and leaves and other parts of the pests attacked by piercing and suction mouthparts and focused pests, the following methods can generally be used to prevent and control:

Restore ecological balance: by increasing the growth of plants, improve their immunity, so that plants can resist pests and pests.

Application of pesticides: Use biological pesticides, such as plant extracts, to control pests.

Conservation and protection: increase the environmental adaptability of plants, improve the survival rate of plants, and reduce the invasion of pests.

Correct fertilization: Through appropriate fertilization, the growth ability and growth rate of state limb plants can be improved, and the attack of pests can be reduced.

Application of plant viruses: Through the application of plant viruses, the number of pests is controlled and the damage of pests to plants is reduced.

Biological control: control the number of pests by introducing natural enemies of pests, such as bees, praying mantises, etc.

The above are some commonly used prevention and control methods, and the specific application needs to be flexibly selected according to the actual situation.

In addition to the fixed products of growth, plants also have indirect defenses, which are used to defend against pests.

Biological control is a control method that uses beneficial organisms or other organisms to suppress or destroy harmful organisms.

Topics include:

(1) Use microbial control.

Common applications include fungi, bacteria, viruses and antibiotics that can secrete antibiotics, such as the use of Beauveria bassiana to control Masson pine caterpillar (fungus), and various variant preparations of Bacillus thuringiensis to control a variety of forestry pests (bacteria). The crude extract of the virus controls the larvae (protozoa) of the cypress moth, pine caterpillar, paulownia twig or bag moth, etc. (virus), 5406 controls the seedling blight (actinomycetes), microsporidia controls the larvae (protozoa) of the dance moth, and Taishan No. 1 controls the longhorn and the fierce section of the dragon (nematode).

(2) Use parasitic natural enemies for prevention and control.

There are mainly parasitic wasps and parasitic flies, the most common are red-eyed wasps, parasitic flies to control pine caterpillars and other pests, swollen-legged bees to control longhorn beetles, and flower horn aphid wasps to control pine round scales.

(3) Use predatory natural enemies for prevention and control.

There are many such natural enemies, mainly insectivore, rodentivorous vertebrates and predatory arthropods. Birds have different insect states that prey on pests, such as, grey sparrows, and woodpeckers. Natural enemies of rodents such as weasels, owls, snakes, etc., and predatory natural enemies of arthropods include ladybugs, praying mantises, ants and other insects, as well as spiders and mites.

Measures to combat organisms that endanger the health of agriculture, storage, buildings and populations by using ecological phenomena and certain biological characteristics that are interdependent and mutually restrictive among organisms in ecosystems.

Bryophytes first appeared on Earth 400 million years ago, and they were the first plants to leave the sea and change from aquatic to terrestrial. Like ferns, bryophytes share a common ancestor with algae, and water is essential for their reproduction. The above three plants, namely algae, mosses and ferns, make up an important group in the plant kingdom - cryptophytes, that is, plants that do not produce seeds but reproduce with spores.

Summary. What are the types of mouthparts of insects that harm horticultural plants? What are the hazards and representative insects? Learn about insect mouths.

Chewing mouthparts Prick-suction mouthparts Siphon mouthparts.

What are the characteristics of plants in the subsidence zone of the Three Gorges Reservoir area? Name the plants you know of in the subsidence zone.

The representatives are grasshoppers, mosquitoes, and moths.