What is the problem of watermelon leaf dryness, and what is the disease of watermelon leaf edge dryn

Watermelon wilt disease is commonly known as "dead seedling disease", in the early stage of the disease, the leaves on the stems and vines of the diseased plant gradually wilt from the base forward, like a lack of water, more obvious at noon, the initial day, morning and evening can still return to normal, a few days later, the wilting of the plant is no longer restored, slowly die, most of the cases of the whole plant disease, there are also diseased plants only part of the stems and vines of the disease, the rest of the stems and vines are normal. The stem of the diseased plant is slightly shrunken at the base, the diseased part is longitudinally cracked, there is a light red (amber) colloidal fluid overflowing, the root is rotten and discolored, the root neck is longitudinally cut, and the vascular part of the plant turns brown. The pathogen mainly overwinters in unrotted organic fertilizer or soil by hyphae, spores or sclerotia.

It can survive in the soil for 6 to 10 years. Germs can be spread through seeds, fertilizers, soil, watering. Compost and manure are the main ways.

The occurrence of diseases is closely related to temperature and humidity. The growth temperature of the fungus is 5 35, and the soil temperature is 24 30 is the suitable temperature for the germination and growth of the pathogen. The disease is soil-borne and the severity of the disease depends on the amount of bacteria that can be infected in the soil.

Generally, there are many underground pests, extensive management, or the soil is heavy and wet.

The agricultural phenomenon is complex, and I am not good enough and inexperienced to make a judgment immediately.

Diagnosis can be observed based on specific symptoms:

1. It may be a physiological disease such as lack of nutrients and lack of water, if the leaves gradually wither and scorch from the tip of the leaf, it is potassium deficiency;

If the whole leaf is uniformly yellow, it is a nitrogen deficiency;

If the leaves wilt and lose water until they dry up, it is a lack of water;

It is also possible that a variety of conditions are the result of physiological disorders.

2. It may also be melon wilt.

Watermelon wilt is a soil-borne disease that spreads pathogens through vascular infection and causes crop wilting. In the early stage of the disease, the leaves gradually lose water and wilt upwards from the roots, and the symptoms are dry after four or five days. The stems are water-stained and rotten.

Its prevention and control points:

Rotation with non-Cucurbitaceae crops, water-upland rotation;

Remember to flood the water to expand the scope of the disease;

selection of disease-resistant and disease-resistant varieties; grafting for disease prevention;

soil disinfection before planting;

In the early stage of the disease, methyl tobuzin, chlorothalonil, copper ammonia, carbendazim and other agents are used to irrigate the roots or spray.

The dry edge of watermelon leaves is leaf blight, which is mainly eroded from the edge of the leaf and the tip of the leaf, and the disease in the lower part is more serious. When the condition is mild, it is necessary to remove the diseased leaves in time and ensure the ventilation of the environment, and in severe cases, it is necessary to spray the diluted meconazole solution. The dry edges of watermelon leaves may be caused by a lack of nutrients, and nitrogen, phosphorus and potassium compound fertilizers need to be applied to alleviate them.

Watermelon leaf edge dry is leaf blight, leaf blight usually breaks out in July and October every year, mainly from the leaf edge, leaf tip and other parts of the erosion, the lower part of the plant disease will be more serious, mostly due to high temperature and humidity, poor ventilation and other reasons.

When the leaf blight of watermelon is relatively mild, it is necessary to remove the diseased leaves in time, sterilize and disinfect them, and then ensure the ventilation of the environment, and give appropriate astigmatism irradiation, and properly turn the soil to ensure the air permeability of the soil. If the condition is severe, diluted distilloconazole solution should be sprayed on the leaves every 7 days**.

The yellowing of the leaf edge of the watermelon may also be that there is no fertilization for a long time, resulting in the lack of nutrients in the seedlings, so that the leaf edge appears to grow and decline, and the leaf edge is yellow.

Applying excessive concentration of chemical fertilizer to the watermelon, or not applying rotten organic fertilizer, will cause the watermelon to burn the roots due to fertilizer damage, so that the edge of the watermelon leaves appear yellow, at this time, it is necessary to water the watermelon, dilute the fertilizer at the roots, and then strengthen the ventilation of the field, so that the watermelon can recover as soon as possible.

The leaves of the watermelon are wilted, which may be the watermelon infected with leaf blight. After being infected with leaf blight, it will invade the leaf part, and the edge and tip of the leaf will be infected first, and a large number of lesions will appear, and then the lesions will expand, causing the leaves to become thinner, scorched, and then fall off. In addition to the damage to the leaves, it can also harm the fruits.

Fungal wilt, if you say that it is diseased, it is this, but your leaf wilting is not necessarily a disease, it may also be too much fertilization, too much sunlight exposure will also wilt.

R. wilt, wilt, wilt, root lesions, fertilizer pests, pests, pesticide damages, droughts, and floods are all possible.

1. Introduction. Watermelon is one of the most popular fruits in the summer season and is popular among consumers due to its high nutritional value and delicious taste. However, sometimes, in the process of planting watermelons, there will be such a problem, that is, the leaves of watermelon seedlings will become dry, which will affect the growth and development of watermelons, and even cause watermelons to not grow normally.

So, what is the reason for the dry leaves of watermelon seedlings?

2. Lack of water. Lack of water is one of the main causes of dry leaves in watermelon seedlings. Watermelons have a high need for water, especially during the growing period, and if it is lacking, it can cause the leaves to dry out or even die.

To avoid this disturbance, it is necessary to water the watermelon regularly, especially during the dry season. In addition, in order to avoid the evaporation of ground moisture, a thick layer of mulch can be spread on the soil, which can have a good moisturizing effect.

3. Lack of fertilizer. In addition to the lack of water, a lack of proper nutrition can also cause watermelon leaves to dry up. Therefore, in the process of cultivating watermelon, it is also very important to fertilize appropriately.

During the vigorous growth of watermelon, it is necessary to apply more fertilizers containing phosphorus, potassium, nitrogen and other trace elements, which can ensure the healthy growth of watermelon seedlings. In addition, if you find that the leaves of watermelon seedlings are dry during cultivation, you can supplement their nutrients by applying some slow-release fertilizer**.

4. Pests and diseases.

Pests and diseases are also a major cause of the drying up of watermelon seedlings. In the process of growth test, if corresponding prevention and control measures are not taken, anthracnose, blight and other diseases may affect the normal growth of watermelon. In addition, there are aphids, planthoppers and other pests, such as the resistance to Zhengguo is not treated in time, it will also harm the growth of watermelon.

Therefore, it is necessary to carry out regular disease inspections and take corresponding prevention and control measures in time to ensure the healthy growth of watermelon seedlings.

5. Meteorological conditions.

Meteorological conditions are also one of the important factors affecting the growth of watermelons. If planted in a cool, humid environment, the watermelon leaves will be in a high humidity state for a long time, which is prone to disease and rot. In addition, if the temperature is too high, it will also dry out the leaves of watermelon seedlings, leading to water loss and death.

For this reason, during the cultivation process, it is necessary to provide the watermelon with the right temperature and humidity according to the local meteorological conditions.

6. Soil conditions.

Soil conditions are also an important factor affecting watermelon growth. If the nutrient content in the soil is low, or if there are too many harmful microorganisms, it will cause the watermelon seedlings to grow poorly and the leaves will gradually dry out. In order to solve this problem, soil improvement can be carried out during the cultivation process and some organic fertilizers can be added, such as decaying plants, animal manure, etc., to improve the quality and moisture content of the soil.

7. Conclusion. In conclusion, there are many reasons why the leaves of watermelon seedlings dry up, which may be caused by lack of water, fertilizer, pests and diseases, or poor meteorological conditions. In order to ensure the healthy growth and harvest of watermelon, we need to pay more attention to these factors in the process of cultivation, and carry out corresponding control and management in time.

Only in this way can we enjoy the fresh, sweet watermelon fruit in the summer.

Watermelon leaves wilt because they are infected with leaf blight. Symptoms of leaf blight cause the leaves to become thinner, scorched, and then fall off; Solution to watermelon leaf blight: 500-600 times of 75 chlorothalonil wettable powder, or 1000 times of 50 promethine can be sprayed for control; It can also be sprayed with 1500 times of 50% Sukrin wettable powder for **.

Daily maintenance should pay attention to frequent soil turning, which can prevent watermelon leaf blight.

About watermelonwatermelon annual vines; The stems and branches are stout and have distinct ridges. tendrils stout, pubescent, petioles thick, pubescent; The leaves are papery, triangular in outline, with whitish-green bouts, with two masks with short stiff hairs, and the base of the leaves is heart-shaped. Monoecious.

Both female and male flowers are solitary in leaf axils. Male peduncles 3-4 cm long, densely covered with yellowish-brown pubescence; calyx tube broadly bell-shaped; corolla pale yellow; The stamens are nearly detached, the filaments are short, and the chamber is curved.

How to eat watermelon1. Peel the watermelon and take out the meat, peel the lychee, dig the core, and take out the lychee meat for later use.

2. Put the watermelon meat, lychee meat and caster sugar together in a food processor and whip evenly, pour them into an ice-making mold, and put them in the refrigerator for 3 hours until the liquid freezes and forms.

3. Put the ice cubes into the food processor again, whip them into slush, and put them in a cup to drink.