What difficulties will be faced in the process of scale insect control?

Scale insects have strong reproductive ability, and because most scale insects are often covered with scales or covered by waxy secretions such as powder and cotton, it is difficult for general chemicals to penetrate into the insect's body, so it has strong resistance, and comprehensive control methods must be adopted to avoid the use of pesticides in places where ladybugs gather in large numbers, such as Australian ladybugs, red ladybugs, golden aphids, wasps, etc. If pesticides are applied, systematic insecticides are used to reduce the risk of damage to predators. If scale insects are found, effective measures should be taken immediately to eradicate them.

2) Manual control. Combined with flower and tree pruning, cut off diseased branches and insect leaves for centralized destruction, or brush (scrape) off with a brush or bamboo chip.

Treatment: There are four main methods.

Phytosanitary enhancement: Under natural conditions, scale insects have little activity, limited transmission and dispersal capacity, and limited distribution. However, with the development of production, the exchange and transportation of flowers is frequent, and the opportunities for manual and remote transmission of pests and diseases are increasing.

The quarantine work stipulates that flowers can be transported without dangerous pests and diseases (including various propagation materials). If pests and diseases are found, various effective measures should be taken to eliminate them and prevent further spread.

Manual control: In the process of planting flowers, if there are scale insects in individual branches and leaves, they can be gently brushed off with a soft brush, or combined with pruning, and the insect branches and leaves can be cut off. Brush clean, cut clean, concentrate on burning, and don't litter.

Chemical control: spraying pesticides during the peak nymph period, depending on the various occurrences of scale insects. Therefore, most nymphs have not yet hatched, the body surface has not yet secreted wax, the shell has not yet formed, and it is still easy to be killed by drugs.

Spray every 7-10 days, 2-3 times in a row. It can be sprayed with 40% dimethoate 1000 times solution, 50% malathion 1500 times solution, 255 times thionion 1000 times solution, 50% dichlorvos 1000 times solution, or deltamethrin 3000 times solution.

Protection and utilization of natural enemies: such as Australian ladybug, red ladybug, golden aphid wasp, soft aphid wasp, red-lipped ladybug, etc. It is an effective natural enemy that can be used to control the damage of scale insects, and should be reasonably protected and utilized.

In the egg stage, due to the protection of the egg shell and the protection of the waxy shell on the outside of the adult stage, the drug cannot penetrate, so the spraying control effect in these two stages is very poor.

First of all, the number of these insects is relatively large, and it is difficult for a while, so in the process of insecticide, in addition to spraying pesticides, it is also necessary to ensure the fertility of the soil and water sources.

Once the scale insect emerges as an adult, the waxy layer secreted by the elytra on its back completely envelops itself. After the scale insect emerges into an adult, the waxy layer has completely wrapped the scale insect with pesticides, and at this time, pesticides containing hypertonic agents must be used for prevention and control, and conventional pesticides are difficult to penetrate into the waxy layer of the scale insect when we use the medicine, so many of us feel that there is no effect after using the medicine.

After the scale insect emerges into an adult, the waxy layer has completely wrapped the scale insect in the waxy layer, and the effect of pesticides is minimal, and it is difficult for conventional pesticides to penetrate into the waxy layer of the scale insect insect

The most critical period for scale insect control is from the egg hatching period to the nymph stage, because the scale insects are very sensitive to drugs during this period.

It should be the spawning and nymph period, which is generally in winter and spring, and the time in March is a very crucial thing.

During ovulation, the prevention and treatment effect is the best at this time, and it is also very effective, so you must grasp the time.

What are the characteristics of scale insects and how to control them.

Hello dear, glad to answer for you. Scale insects are a common pest, causing great harm to crops, such as sucking juice on the leaves and fruits of fruit crops such as fruit trees, tea trees, grapes, and lychees, resulting in yellowing, wilting, fruit yield reduction and damage. The following are the characteristics and control methods of scale insects:

1.Characteristics: The shape of the scale insect is like an aphid, the individual is small, the largest is only about 5 mm, the adult is usually a flat oval or spherical shape, generally gray-brown or black, some species can even secrete sweet substances to attract aphids, forming an "aphid pasture".

2.Control methods: mainly use chemical control and biological control.

1) Chemical control: chemical control is mainly through spraying pesticides, commonly used are butylthion, fritillary oil, acetylmethylamine, etc. Before spraying, carefully check the instructions for the use of the agent, and prepare and use it according to the appropriate concentration.

At the same time, it should be noted that the drug should be stopped for a period of time during the fruit ripening period and before the picking hall is disputed to avoid residual problems. (2) Biological control: biological control mainly adopts natural enemy control methods, such as capturing and eating some natural enemy insects (such as aphid cocoon wasps, beetles, ladybugs, etc.), and insect nitrogen fixation can also be used to inhibit scale insects.

In short, the key to the control of scale insects lies in comprehensive control, that is, to take comprehensive control measures, not to rely too much on a single measure, such as management measures related to the ecological environment, such as weed removal, land improvement, enhancement of plant vitality, routine field pest control, etc., these measures can usually reduce the harm of scale insects.

The control of scale insects is generally carried out in the egg stage and nymph stage, specifically from late April to the end of June every year. Control method: During the nymph stage, use 4000-5000 times of 20% emulsifiable concentrate, or 10% cypermethrin emulsifiable concentrate 1000-2000 times, or 40% dimethoate emulsifiable concentrate 1000 times, or 4000 times of kung fu emulsifiable concentrate for spraying, spray once every 7-10 days, and spray 2-3 times continuously.

1. The best time for the prevention and control of scale insects every year

1. The control of scale insects is generally carried out in the egg stage and nymph stage, because after the scale insects emerge into adults, the elytra on their back will secrete a waxy layer to protect themselves, and it is difficult for the sprayed drugs to enter the body of the pest and play a role.

2. There are many species of scale insects, but most of the first generation of nymphs are concentrated in late April to the end of June, which is the best period for the prevention and control of scale insects, in addition, from mid-July to the end of September, it is necessary to pay attention to the prevention and control of the second generation of scale scale insects and nymphs, and the specific control time needs to be adjusted according to the species of scale insects.

3. Blowing scales: In the northern region, the peak period of the first generation of eggs and nymphs is from mid to late April to June, and the peak period of the second generation of eggs and nymphs is from mid-July to September. In the southern region, the first generation of eggs and nymphs blooms from early March to May, the second generation of eggs and nymphs blooms from mid to early May to late July, and the third generation of eggs and nymphs bloom from mid-August to mid-October.

4. Sagittal scale: The peak period of nymphs is mainly 3-4 time periods (3-4 generation areas), which are mid-April, late June to early July, early to mid-September, and early December.

5. Fur scale: There are three main time periods for nymphs, namely late May to early June, late July to early August, and early to mid-September.

6. Red wax scale: the peak hatching period of eggs is from late May to mid-June.

7. Japanese turtle wax scale: the peak hatching period of insect eggs is around late June.

8. Pear scale: The peak period of nymphs is mainly in three time periods, namely early to mid-June, late July to early September, and September to early November.

9. Mulberry white scale: the nymph hatching period is mainly in early to mid-May, mid-to-late July, and early to mid-September.

10. Mealybug: The peak hatching period of larvae is mid to late May, mid to late July, and late August.

2. How can scale insects be completely eliminated?

1. In the nymph stage, use 1000 times of 40% oxidized dimethoate EC, or 4000 times of kung fu emulsifiable concentrate, or 4000-5000 times of 20% dimethoate emulsifiable concentrate, or 10% cypermethrin emulsifiable concentrate 1000-2000 times of liquid for spraying, spray once every 7-10 days, and spray 2-3 times continuously (laundry detergent can be added to the drug to increase the expandability of the drug).

2. In the early stage of egg hatching, 4000 times of spiromethane ethyl ester suspension + 2000 times of 5% acetamiprid were used for prevention and control.

3. In winter or early spring, spray 3-5 degrees of stone sulfur mixture to eliminate overwintering insect eggs.

4. At the peak of the occurrence of scale scale insects, use 800-1000 times of 40% melt scale emulsifiable concentrate + 20ml of Jiexiaoli spray for control.

1.If a small number of scale insects are found, they can be manually removed and directly eliminated.

2.If there are a large number of scale insects, you can choose to discard the plants with the insects, and throw them away along with the pots.

3.You can also use insecticides that kill scale insects, and pay attention to the concentration of insecticides should be diluted before spraying.

4.In the larval stage, scale insects can be sprayed with low-toxicity agents such as flower protection, quick culling, and matrine, which can have a good effect.

5.When it comes to the adult stage, these agents can play a certain role, but it is difficult to **, and I still feel that I have not killed it after using it.

6.At this time, three agents can be used: phosphorus, thiamethoxam, and organosilicon high penetrant, which cannot be used alone, and need to be used alternately to play the best role.

To prevent scale insects, it is necessary to give the plant a suitable growth environment, reasonable watering and fertilization during the maintenance period, and to keep the environment ventilated. During the growth period, spray the plant with fungicide once between 20 and 30 days, which can effectively prevent pests and diseases. If there are scale insects on the plant, it is necessary to cut off the leaves and branches in time, and then spray the plant.

Scale insects mostly occur in spring or summer, and plants are susceptible to scale insects in a high-temperature, dry and closed environment. In order to avoid the infestation of scale insects, reasonable watering and fertilization are required during the maintenance period, which can enhance the disease resistance of plants. During the maintenance period, the windows should be opened frequently to maintain indoor air circulation.

During the maintenance period, regular spraying of fungicides on plants can effectively prevent pests and diseases. During the curing period, the plant can be sprayed with a fungicide once between 20 and 30 days, such as chlorothalonil or carbendazim. Do not put the plant in a sunny place after spraying, you can put it in a cool and ventilated place indoors for maintenance.

If the plant is attacked by scale insects during the growth period, it is necessary to cut off the leaves and branches of the plant and burn them intensively to cut off the source of infection. If there are a small number of scale insects on the stems and leaves of the plant, you can use soapy water, washing powder, pepper water, cigarette butt water or pepper water to remove insects.

If there are a large number of scale insects on the stems and leaves of the plant, it is necessary to spray the plant with relevant chemicals to remove the insects. You can spray plants with chemical agents such as carbendazim, flower protector, worm forest or rapid culling, and the agent can be sprayed once for 1 time between 7 and 10 days, and after spraying 3 or 4 times in a row, it can inhibit pests and make the plant recover.