What are the common scale insects of passion fruit trees? How to prevent it?

Scale insects are a pest of fruit trees that are tolerant to fruit trees, and when fruits such as mango and grapefruit are ripe, scale insects will enter a high-yield period. What are the dangers of scale worms? Therefore, this time, I would like to introduce the dangers of scales and how to prevent them.

Strong fecundity in citrus producing areas, this pest can be seen everywhere, so scales are the natural enemies of citrus. First of all, one of the hazards of the scale is not only the strong reproduction ability of the scale, but also the many species.

Leaf damage, scale insects often suck the juice in fruits to achieve the purpose of reproduction, but some leaves left by scale insects will turn yellow, thus affecting the photosynthesis of plants. In the case of severe damage from scale insects, fruit trees may also wither. In addition to the above, after the scalp spends time on the fruit tree, the scale will leave some honeydew, but in the honeydew left by the scale, it will attract ants to eat honeydew.

Ants will also gnaw on the bark of the tree to a certain extent, losing the shade effect of the tree. So there are so many hazards of scales, how can we prevent and kill them?

To avoid the spread of scales, because the size of the scale insect is relatively small, the transmission ability of the scale is very limited, and it cannot damage the fruit tree in a large area. Therefore, if a part of the fruit tree is found to be infested by a scale, this part of the fruit tree should be isolated to prevent its further spread. Spray pesticides promptly.

When the scales are still in the nymph stage, preventing the scales at this time can have the greatest effect. Every year in May and June, pesticides should be sprayed as early as possible to prevent the harm of scales. At this time, the pesticide that can be selected is the shell nirvana spray, and the use factor should be 600 to 800 times.

This can effectively prevent pests.

Appropriate application of predators. As the saying goes, "Where there is a cause, there must be an effect". Scale insects must also be the presence of natural enemies.

Because ladybugs are very fond of preying on scales in nature, it is also a good way to prevent scales by releasing ladybugs into their fruit trees when they are found to be pests when paying attention to farming. Scaleworms have jumping wasps as parasitic natural enemies, but after the pest is found, the parasitic natural enemies of the scale worms can also be introduced to kill the scales.

Scale insects often congregate on passion fruit leaves, branches, and fruits. Adults and nymphs of scale insects insert needle-like mouthparts into passion fruit leaves and branches to absorb sap, and their excretions can induce coal stain disease, which is manifested as a black mold layer on the surface of branches, leaves and fruits, hindering photosynthesis and affecting normal growth.

The control can choose high-quality non-toxic grafted seedlings, less insect sources, and reasonable fertilization, the plants are robust and can enhance resistance; The main vine and thick branches can be coated with vegetable oil, or 800 times the green protection can be used to control scale insects; Strengthen passion fruit pruning technology, improve the ventilation and light transmission of the orchard, prune and prune the seriously damaged branches, and destroy the damaged branches, leaves and fruits in a centralized manner, reduce the number of insects and eggs, and can also be controlled by drugs and organisms.

The main diseases of passion fruit are mainly mites, leaf miners, flower and fruit diseases and other diseases. First of all, we want to introduce how to prevent this?

We need to choose the right soil for cultivation, and we need to maintain some water content in the field to prevent this water accumulation, and we need to remove some burned diseased leaves, diseased branches and so on in time. It can remove some diseased leaves and branches in time, and keep away from all kinds of melons, eggplant, fruits and vegetables and bananas.

We can also use some drugs to prevent and treat it, such as cataplexy: use 600 times the solution of cataplexy, for example, there is superficial disease: we can use 600 to 800 times the liquid of light yellow, and some of that avermectin:

6,000 to 10,000 times the liquid can be used. Of course, it is also very important for us to do some necessary protective measures, we mainly focus on prevention, supplemented by comprehensive prevention and control, and advocate some ecological prevention. In addition, we prohibit the use of pesticides 30 days before fruit picking, because it will cause harm to the human body.

The above is my sharing of some knowledge points on passion fruit pest control.

Passion fruit anthracnose mainly harms passion fruit and fruit stalk, young fruit will appear water-soaked black spots, yellow halo spots appear around the spots, the fruit appears concave and convex in the later stage, and finally the fruit falls, the fruit stalk appears black spots, and the fruit falls off before it is ripe. During prevention, attention should be paid to improving the light and light transmission conditions of the orchard, and draining and reducing humidity in the rainy season; In the early stage of the disease, mancozeb prochloraz + pyraclostrobin can be used for prevention and treatment. It should be noted that the pathogenic bacteria of the disease can also induce root rot, so it is necessary to pay attention to soil maintenance and sanitization, such as increasing the application of live soil monarch compound bacteria.

<> common diseases that harm the growth of passion fruit are mainly as follows, let's elaborate on them in detail: the first is called mosaic virus disease, when passion fruit is replaced with this disease, the leaves of passion fruit will show a flower and leaf, and light yellow spots will appear on the leaves. Red Spider:

The insect body is small, difficult to find with the naked eye, for the disease for the leaf yellowing, shrinkage, when this symptom appears, the back of the leaf should be carefully examined, such as the size of the needle tip of the red spider, should be sprayed in time to prevent and control. available"Dimethoate"、"Dimethoate"、"Insecticidal phosphorus"Apply a spray.

Stem base rot: high cost, prevention should be the mainstay. It is necessary to pay attention to soil management, keep the orchard ventilated and light, reduce stem wounds, and choose fludioxonil + potassium permanganate as a timely preventive agent in high temperature and rainy periods.

In the early stage of the disease, scrape the diseased part, and use methyl frost mildew and mosaic disease as a worldwide viral disease, not only on passion fruit, but also on the leaves at the onset of the disease and the appearance of disease spots, and in severe cases, the leaves will be curled up and deformed, and the flowers will also be deformed and scarce when flowering. The plants grow weakly, dwarf, and bear very little fruit.

Agricultural control methods of mosaic disease: First, choose an orchard where passion fruit is planted, do not choose a vegetable plot that has been planted with melons and fruits, and do not choose a nearby land where such melons and fruits have been planted. Second, passion fruit should be grown using virus-free cultivation techniques.

Passion fruit seedlings should be sprayed with pesticides during the flowering and fruiting process, or some bee-like things should be cultivated.

First of all, the branches and leaves with particularly serious pests and diseases should be cut off, and some pesticides can be sprayed to control the pests and diseases of passion fruit.

Spray some pesticides, pesticides can get rid of bugs and prevent insect infestations.

We should spray pesticides to prevent pests and diseases, so that it is fine, and we should get rid of all these pests and diseases, and we should water them more.

1. Select good plants: for future planting, the selection of plants with good genes saves time and effort, it is recommended that planting friends choose plants with strong resistance to plants, and cultivate healthy and strong plants in the early stage.

2. Early detection and: The prevention of passion fruit virus disease should be detected early, and pesticides should be sprayed in time to prevent the continuation of the disease in the early stage of detection. A mixture of fungicide and octamine acetate should be used for prevention and**, while the occurrence of aphids and other pests should be well controlled.

High-efficiency liquid fertilizer is used for foliar spraying, spraying 2-3 times, once every 7-10 days, to weaken virus activity, accumulate nutrients, enhance plant fiber, improve resistance, control plant diseases, and restore normal growth of diseased plants.

The common ones are: paramecium, cotton scale, Kang's mealybug, Japanese turtle wax scale, Japanese turtle wax scale, mulberry white scale, pear round scale.

Prevention and control method: use 50 ml of vinegar, soak the small cotton ball in vinegar, and wipe the wet cotton ball on the stems and leaves of the damaged flowers and trees, this method has a certain control effect.

Fruit tree scale insect is a kind of insect pest that occurs during the growth of fruit trees, mainly including mulberry white scale, persimmon scale, pear round scale, paramecium, etc., which seriously affects the quality and yield of fruits. It needs to be controlled during the growth period, when the insects are extremely sensitive to pesticides, which is a critical period for control. Once the nymphs are fixed, they will soon secrete wax to protect the insect body, and the chemical control effect will decline, so it is necessary to seize the critical period of prevention and control, choose effective agents, and control the harm with only one medicine.

Strengthen orchard management, timely fertilization and irrigation, meet the needs of fruit trees for water and fertilizer, and improve the insect resistance of fruit trees.

Combined with plastic pruning, burn the insect-bearing branches.

Cataplexy:Cataplexy occurs in the seedling stage, when it occurs, the stem of the plant has a water-stained shape, and spreads rapidly, until the stem of the plant withers and lodging with the ground, if the ground humidity is large, a layer of white mildew will grow around the plant, and then the leaves and roots all rot and die.

Prevention and control methods: choose plots with high terrain, low groundwater level and good drainage performance when sowing seedlings, disinfect and sterilize seeds and soil before planting, and regularly spray diluted potassium dihydrogen phosphate when seedlings to prevent diseases. In addition, the seedling stage should pay attention to ventilation and light transmittance, and watering should be based on the soil and climate.

Mosaic disease:Mosaic disease is a worldwide viral disease, not only on passion fruit, the leaves begin to fade and appear lesions at the onset of the disease, and the leaves will shrink and deform when they are severe, and will also cause flower deformities and scarcity of flowers during flowering. The plants grow weakly, dwarf, and bear very little fruit.

Prevention and control methods: cultivate virus-free, disease-resistant plants, strengthen management, increase plant resistance, mosaic disease is transmitted by many insects, so eliminate vector aphids and other insects, find diseased leaves, diseased plants and clean up in time.

Passion fruit planting precautions.

Passion fruit likes light, daily maintenance should let passion fruit bask in the sun, the more light is more beneficial to the growth of the plant, and can make passion fruit grow vigorously, more flowers and fruits, if there is a lack of light, the stems and leaves of passion fruit will be weak, less flowering or even no flowering.

Passion fruit is originally a tropical plant, so in the daily maintenance of passion fruit to give a relatively high temperature environment, the south of the high temperature area can be open in winter, the cold area in the north of the winter to move into the indoor maintenance, and always pay attention to the maintenance of the environment ventilation.

Scale insects occur 2-3 generations a year, late May to early June is the most harmful generation, because its body surface secretes a layer of wax, and the occurrence is not neat, so the prevention and control should be carried out in two steps:

1. In the orchard where the first occurrence occurs, the insect branches should be completely cut off, burned or manually brushed with insect branches to eradicate the insect source;

2. Spray 5 degrees of stone sulfur mixture or 5% diesel emulsion before budding (i.e., winter or spring) for 1-2 times, and use kerosene to brush and rub the insect body before spraying branches with large insect density, so as to facilitate the penetration of the agent and improve the insecticidal effect;

3. Do a good job of observing, from late May to early June, before the scale insect nymphs secrete wax powder scale shells during the dispersed transfer period, the control effect of pesticides is more favorable, in order to improve the insecticidal effect, it is best to mix the laundry detergent in the solution. Available 25% cyanophos, 12% chlorchlorophorifos, cypermethrin, kung fu, 10% cypermethrin, 25% perchlorophos. 48% chlorpyrifos and other pesticides are sprayed, and then sprayed once every 5-7 days, which can kill most scale insects and nymphs.

If the insecticide used in fruit trees has been a biological pesticide with matrine and cypermethrin, the scale insect does not need special control, and it will be naturally eliminated from the garden, because cyanomatrine has a special effect on the control of scale insects at a temperature of more than 20.

The passion fruit stems are lush and dense, and the flowers and fruits grow and develop under the stems and vines, and it is difficult to control various diseases and insects, and the liquid medicine is difficult to contact with all the stems and vines, especially some hidden diseases and insects such as powdery mildew and thrips are difficult to kill. If underground pesticide application is used, so that the liquid medicine is absorbed through the root system and then transported to the stems and leaves, it can kill and extinguish the diseases and insects that damage the stems and leaves, and can also effectively control underground pests such as root rot, bacterial wilt, and root-knot nematodes.

Specific method: When planting passion fruit, in the planting hole at the base of the seedling root, sprinkle carbendazim powder and chlorpyrifos granules, sprinkle 15-20 grams of each plant, evenly sprinkle in the soil around the roots of passion fruit seedlings, and cover the soil. In the process of passion fruit growth and development, 800 times Bacillus subtilis, 1000 times 25% imidacloprid mixture, or 800 times octenamine acetate, 1000 times veratroline mixture, or 1000 times 80% carbendazim, 1000 times 20% thiamethoxam mixture are applied to the roots once a month, each time each kilogram is sprayed, and evenly poured in the soil around the roots of passion fruit plants.

In this case, high-efficiency liquid fertilizer can be used for foliar spraying, spraying 2-3 times, spraying once every 7-10 days, weakening virus activity, accumulating nutrients, strengthening plant fiber, improving resistance, controlling plant diseases, choosing to buy pesticides I am on the harvest of agricultural materials, and technical services can consult experts on agricultural issues.