When is the most critical period for scale insect control?

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.

Hello, I am glad to answer for you, the best time for the control of potato scale insects every year is from the egg hatching period to the nymph stage. During this period, scale insects have not yet been dissolved, and they are formed or thickened, and they are more sensitive to drugs. It can be sprayed with 1000 times of 40% dimethoate EC or 4000 times of kung fu emulsifiable concentrate for prevention and control, and the drug should be used once every 7-10 days, 2-3 times in a row.

Answer: The control of scale insects is generally carried out in the egg stage and the 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.

To eliminate scale insects, in the early stage of the plant, spray the plant with special insecticides (such as cocoon bizhi) in time**, and generally spray twice every 5-7 days to completely eliminate it. Regular pruning of plants will increase the ventilation and light transmission of the plants, which can reduce the incidence of pests and diseases. Applying a thin fertilizer to the plants on a regular basis allows them to grow vigorously and to increase their resistance to pests and diseases, thus reducing the chance of disease.

1. How can scale insects be completely eliminated?

1. Drug spraying.

Scale insect is a pest that harms plants, if you want to completely eliminate it, you need to use special insecticides to spray the plants in the early stage of the plant**, such as "scale must be treated" 750-1000 times liquid, etc., generally used once every 5-7 days, spraying twice in a row can be completely eliminated.

2. Prune regularly.

If you want to avoid scale insects in plants, you need to prune them regularly when caring for them. For example, some dead branches, weak branches, etc., should be cut off in time, because these branches and leaves are most likely to be attacked by pests and diseases, after pruning, the ventilation and light transmission of the plant will be enhanced, so as to reduce the incidence of pests and diseases.

3. Sufficient nutrients.

If you want to avoid the plant from producing scale insects, then you also need to regularly apply thin fertilizer to the plant, so that the plant can grow strongly, so that the plant's ability to resist diseases and insects can also be enhanced, and it needs to be given a suitable environment according to the growth habit of the plant every day, otherwise the plant is also susceptible to pests and diseases.

2. What causes the production of scale insects?

1. Causes of scale insect outbreaks.

The cause of the outbreak of scale insects is mainly due to environmental problems, and scale insects are thermophilic and suitable for growing in warm, humid and relatively closed climates. During the growth period, if the plant is kept indoors in a closed, humid and stuffy environment for a long time, it is easy to be attacked by scale insects.

2. Indoor plant insect control methods.

1) Mosquito coil smoke, light the mosquito coil and hang it on the insect-containing plant, then seal the plant and flower pot with plastic film, after 1 hour, all aphids, red spiders, and whiteflies are all eliminated. This method is particularly suitable for kumquats, which are susceptible to spider mites.

2) Add water (400-500 times) to spray the plants. Wind oil essence has a strong osmotic effect, so it is effective against all kinds of pests, especially pests such as green sac mat brocade wax scale, which is not effective for general insecticides, and the effect is better.

3) Flowers with tubers (e.g., peony, dahlia) and bulbs (e.g., lilies, lycoris) and flowers with fleshy roots are often harmed by nematodes and are not easy to detect. As long as the mothballs are ground and placed in the potting soil, the underground pests will be slowly killed.

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

Scale insects are caused by a closed, humid or stuffy environment. When maintaining the plant, if it is found that there are scale insects on the leaves, it is necessary to cut off the insect leaves on the plant immediately, and burn them with an open flame, and then spray the leaves to prevent the spread of pests and diseases.

1. Causes

Scale insects are caused by a closed, humid or stuffy environment, when maintaining plants, they need to be placed in a ventilated and diffused environment, if the temperature is too high, it is necessary to reduce the heat of the plant to avoid wilting of its leaves, thus causing insect pests.

2. Cleaning up pests and diseases

When maintaining the plant, if you find that there are scale insects on the leaves, you need to cut off the insect leaves and diseased leaves on the plant immediately, and burn the leaves with an open flame, and you also need to spray the plant once immediately to remove the scale insects on the leaves, and prevent the spread of pests and diseases.

3. Strengthen ventilation

In the process of maintaining the plant, it is necessary to open the window frequently for ventilation to maintain the circulation of the air, so as to reduce the probability of scale insects, if the environment is not well ventilated, coupled with the high temperature, it will be very easy to breed scale insects.

4. Regular sterilization

In the process of maintaining the plant, it is necessary to spray carbendazim or chlorothalonil every 20-30 days, so as to effectively prevent scale insects for the plant, pay attention to the spraying agent must be diluted before it can be used to prevent the phenomenon of pesticide damage to the plant.