Kiwifruit seedling blight is very common, how to prevent and control blight?

For reasonable water and fertilizer management, you can shoot some Dixon, or you can mix some diqualin, disinfect the seeds, and disinfect the soil before planting.

The first thing to do is to choose varieties that are resistant to the disease, and then drugs can be sprayed to combat the disease.

When planting, we should choose kiwifruit seedlings of very good quality, apply good base fertilizer before planting, the water should be very sufficient, the fertilizer should be sufficient, the temperature should be suitable, there should be frequent sunshine, frequent sterilization and disinfection, and liquid disinfectants can be used for spraying.

Usually to keep the soil suitable for the growth of kiwifruit seedlings, maintain sufficient water and light, keep humidity and temperature within the appropriate range, if there are symptoms of blight, should be sprayed with pesticides at the first time.

Usually to strengthen fertilization, usually can be sprayed in the germination period on some fungal for prevention, to usually prune in time, to ensure good ventilation effect, to give enough light.

There will be a lot of problems, first of all, there will be certain problems in the selection of pesticides, and there will be certain problems in the amount of fertilizer and the proportion of fertilizer.

Blind pursuit of high yield, too much fruit will cause seedlings to be nutritious, so that the quality of kiwifruit declines, some fruit farmers generally pay attention to branch pruning, but do not pay attention to soil cultivation, the organic content of the soil declines, kiwifruit will not grow well.

The problem is that there will be some diseases in kiwifruit, which is more complicated with the control of pests and diseases, which will be affected by the weather factors, and will also slow down the effect of pest control due to rainy weather.

There are too many pests and diseases, improper environmental management of kiwifruit trees, single planting methods of kiwifruit trees, too much reliance on chemical pesticides, no attention to the nutrients of the kiwi trees themselves, and no choice of the correct environment for breeding kiwi trees.

1.Kiwis will have a lot of curls and have problems with broken and dried leaves. At this time, winter landscaping should be done, diseased branches should be cut off, and burned together with fallen leaves to reduce the source of overwintering bacteria.

Strengthen fertilizer and water management, reasonable load, enhance the potential of forest trees, and improve the disease resistance of forest trees; "Early prevention" refers to the use of drugs at the flowering stage, young fruit stage and leaf development stage, as well as the early killing and sterilization of pathogens during the sensitive period of crop growth, so as to reduce the root of pathogens and lay a good foundation for disease prevention and control within one year.

2."Again" refers to increasing the dose (increasing the concentration, increasing the dose, and shortening the medication time) before the onset of the disease, which cannot be done by chemical drugs. Over the years, the people have summarized the annual three-dimensional prevention and control plan of "prevention, control, breeding and breeding" in the prevention and control of kiwifruit canker, and achieved good results.

3.The lesions of kiwifruit are reddish-brown with slight water stains that gradually expand into oval or irregular dark brown lesions. Bacteria can invade the interior of the cortex or as deep as the xylem, and the diseased tissue will die and decay, and gradually shrink and sink slightly after losing water in the later stage.

During the growing season, the flower buds of the trees should be removed in time and the ineffective branches and leaves should be cut off. In addition, through pruning measures such as thinning and shrinking, the ventilation and light conditions of the canopy can be improved, so as to balance the nutrients of the tree and control the canopy. The orchard is well ventilated and light-transmitting, and the branches and buds grow vigorously.

4.Pesticide control after pruning in winter gardens requires spraying with antifungal agents. Spray again in the spring before the conidia spread. Chemicals are sprayed at the beginning of the disease and at the peak of the disease after foliar spread.

5.Farmers who produce green fruits believe that while chemicals are being used quickly, they inevitably have an impact on the environment. Addressing this issue.

At the same time, soil application of Bacillus subtilis could effectively regulate the number and structure of soil microorganisms in the rhizosphere of trees, increase the activity of soil enzymes or restore normal levels of diseased plants, improve the rhizosphere growth environment of diseased plants, and promote the growth of roots and trees.

There are a lot of problems, first of all, it is likely to lead to a decrease in yield, and there is also a possibility that the kiwifruit fruit will be bad and rotten. Be sure to spray some pesticides and insecticides in a timely manner. Its effect is to replenish the vitamins needed by the body, but also to enhance people's memory, can accelerate metabolism, can prevent constipation, and can also clear the bad breath.

The problem now is that there is no special attention to the disease control of kiwifruit, and the disease of kiwifruit is not particularly understood, and the disease of kiwifruit has not received great attention. It can be prevented and controlled by some scientific and technological means. The effect of kiwifruit is that it can supplement vitamins, can promote digestion, can prevent high blood pressure, and can promote blood circulation.

There are many kiwifruit diseases and insect pests, resulting in dwarf plants, yellowing of leaves, wilting, serious water shortage, there are these problems, should be carried out to use pesticides, control water, you can prevent and control, the effect is to improve the yield of kiwifruit.

I don't know what you're talking about, but you can refer to these factors

Summary of technical measures for field management of kiwifruit seedlings.

Climatic factors. Cooling and frost damage.

At the budding or leaf development stage, the temperature drops or snowfalls, the temperature is below freezing, the cell juice of young shoots and branches and leaves freezes, the tissues are damaged, and they suffer from frost damage.

Night frost hazards. The temperature drops sharply during the budding period of the leaves, and black frost appears, and the temperature is generally lower than 5 for several hours, and the leaves or tissues are wilted or shriveled, and suffer from frost damage.

High wind hazards. With rainfall, strong winds above level 5, especially above level 7, if the leaves of seedlings last for 8 hours, there will be different degrees of water loss, intermittent wilting, curling and deformation. After severe wind, the damaged leaves are exposed to the sun, and the edges of the leaves are scalded and wilted. Severe wind damage can cause a large number of branches to blow and break.

High temperature and drought. If the temperature above 35 degrees Celsius lasts for 10-40 hours, the leaves of the seedlings will dry up, especially in the case, and the severely weak plants will die.

Wilt after the rain. In summer, the rainfall is suddenly clear, the plant is most prone to leaf drooping and wilting, and there is a contradiction between root moisture ** and leaf water transpiration, which can lead to plant death.

Rain and waterlogging. After continuous rainfall and summer irrigation (most obvious after flood irrigation), the soil water content is saturated for a long time, the root respiration is blocked, and the capillary roots and supporting roots are physiologically browned and ulcerated.

Cold damage and frost damage. In late autumn and early winter, the temperature drops sharply or after the budding in spring, and the main stem or heel neck is susceptible to frost necrosis until the aboveground part dries up, and seriously extends to the root brown rot and death.

Fungal diseases. There are cataplexy and blight at the seedling stage, and leaf spot, gray mold, black spot, anthracnose, branch rot, phytophthora disease, brown spot, root rot, white silk disease, etc2.Bacterial diseases.

Ulcer disease. In frost-damaged years, seedlings are most susceptible to canker disease. In the spring in the dominant position, in the summer in the leaf part.

All kinds of insect pests. There are many insect pests that harm seedlings. The root system has grubs and needleworms; The leaves include snails, beetles, leaf-curling moths, penetrated winged moths, Spodoptera litura, peach borer, leafhoppers, planthoppers, aphids, red and white, wax cicadas, bugs, etc. The branches include mulberry shield scale, paramecium, ball scale, willow bat moth, wood codling moth, etc.

Physiological diseases. Yellowing, disease, leaf blight, wilting, leaf curling, mosaic, sunburn, etc.

It depends on the situation of black spot disease, prevention and control methods:

1. Thoroughly clear the garden in winter, combined with pruning, completely remove dead branches and fallen leaves, prune diseased branches, and eliminate the source of disease.

2. Spray 1 time of 3-5 Baumé stone sulfur mixture before budding in spring.

Kiwifruit diseases are:

Fruit soft rot.

Pedicle rot. Anthrax.

Sunburn and so on.

Cooked rot or soft rot:

Main characteristics]: Kiwifruit soft rot mainly occurs in the post-ripening period after the harvest of kiwifruit fruit, the flesh inside the fruit is soft rot, losing its edible value, manifested as the flesh appears a little finger-sized depression, peeling off the epidermis of the depression, the center of the disease is milky white, the surrounding is yellow-green, the periphery is dark green and ring-shaped, and the flesh is soft rot. Longitudinal section of the soft rot site, the soft rot is conical and penetrates deep into the flesh, and the disease mostly starts from the fruit pedicle or fruit side, and some start from the fruit umbilicus, and the initial appearance diagnosis is difficult.

The pathogens are Staphylophyllum and Pseudostemic Spotted Mold. It is a fungal disease. It usually invades the fruit during the hot and rainy season, and is revealed after harvest.

Prevention and control methods]:

1) Choose a place with deep soil, fertile, good drainage, good ventilation and lighting conditions to build a garden. Increase the application of organic fertilizer, improve the soil, enhance the tree strength, and improve disease resistance. After winter pruning, the branches, dead branches, fruit stalks, leaves, etc. should be burned or buried deeply, and the garden should be completely cleared.

2) In June and July, the fruit should be bagged, and fungicides should be sprayed on the fruit and tree body before bagging; In order to reduce the rate of soft rot fruits, the medium and late maturing varieties can be harvested when the soluble solids content is 8% 9%, which can greatly reduce the storage risk, and the storage performance of the stored fruit will be better and the quality will be better.

3) Strict selection before warehousing; When the refrigerated fruit is stored for 30 days and 60 days, it is sorted twice to remove the injured fruit and the diseased fruit.

In fact, there are not many diseases of kiwifruit, mainly leaf spot and brown spot in the middle and late stages, resulting in yellow leaves and early defoliation. Disease prevention and control, in addition to early pesticide prevention, can also be through a balance of fertilization and foliar fertilizer to reduce the occurrence of diseases, such as calcium fertilizer, calcium can increase leaf thickness, improve fruit hardness, enhance the disease resistance of the tree, more calcium fertilizer, is conducive to reducing disease. Calcium supplementation can be supplemented by roots, flushing micro-supplementation of root force calcium or sprinkling of micro-supplementation force, or supplementation by foliar spraying, adding micro-supplementing capping power, water-soluble calcium, and prepared calcium, without hormones, without nitrogen fertilizer, and with high absorption and utilization rate.