When planting garlic, the tips of the leaves dry up and yellow, what is the cause and how to prevent

In the process of growing garlic, it is common to encounter a situation in which the tips of garlic plants are dry and yellow. Dried garlic sharp leaf yellow will not only cause a decrease in yield, but also affect the commodity value of garlic and garlic sprouts, so we growers must pay attention to this situation.

First of all, we must know that garlic is a relatively cold vegetable, and the suitable temperature for the growth and development of the stems and leaves of garlic plants is about 20 degrees. If the temperature exceeds 28 degrees, the respiration of garlic leaves will be enhanced, the water transpiration will be greater, and the more nutrients will be consumed.

We can see that the plant gradually spreads from the tip of the leaf to the base, and gradually the dry tip appears. If it encounters hot and dry wind, it will cause more damage to the leaves of the plant.

If it is not detected in time or if it is not prevented accordingly, it is inevitable that the reduction of production and income will be avoided.

Secondly, the roots absorbed by garlic at the seedling stage changed from longitudinal growth to horizontal growth, and absorbed nutrients and water for the needs of plant growth and development, and functional leaves continued to grow for photosynthesis to produce nutrients, and plant growth gradually transitioned from relying on mother petal nutrition to photosynthetic nutrition. In this short period of time, the female petal gradually shrinks due to the depletion of nutrients until it dries up into a film, a process called "mother-reeling" or "rotting mother".

During the period of "mother", garlic buds and flower buds are in the differentiation period, which requires a lot of nutrients, the nutrients of the mother petals have been exhausted, and the plant is not very adaptable to autotrophic growth, so the nutrients are in a state of green and yellow, which is manifested in the yellowing of the tips of the first to fourth leaves on the plant, which is called "dry tip".

Therefore, the "dry tip" is also a kind of growth transition of garlic plants, not due to less fertilization or disease.

We need to be able to distinguish between the two clearly.

Of course, garlic overplanting and root maggots and other insect pests are also one of the important reasons for garlic planting with sharp and dry yellow leaves. Garlic can not be continuously cropped, continuous cropping will only cause our garlic output to be lower and lower, and the leaf tips of garlic plants will also turn yellow in advance, and then gradually spread upward, and eventually lead to a large number of yellow leaves of garlic plants. The common underground pests of garlic include root maggots, soil tigers, etc., which will often bite the root system of garlic, thereby indirectly causing the garlic plants to rot, resulting in the occurrence of dry yellow leaves of the above-ground plants.

In this regard, our main control measure is to choose garlic cloves with hypertrophy and complete bottom buds without disease spots. Secondly, avoid continuous cropping of garlic, continuous heavy stubble of sharp dry yellow leaves is generally weak root growth, in this case it is necessary to promote the growth and development of the root system, promote the growth of the root system, in order to alleviate the phenomenon of sharp dry yellow leaves. In addition, choose the appropriate agent to sprinkle the first room and re-irrigate, so that the drug can penetrate into the ground, and use water to control underground pests.

At the same time, it is also necessary to pay attention to the foliar spraying of amino acid foliar fertilizer in the early stage of "motherhood" to enhance the resistance of garlic plants.

It may be that the fertility of the land is not enough, which leads to malnutrition of garlic, and some chemical fertilizers can be applied to garlic regularly.

If the temperature exceeds 28 degrees, the respiration of garlic leaves will be enhanced, the water transpiration will be large, the more nutrients will be consumed, and the phenomenon of yellow leaves will be dry.

Choose disease-resistant varieties, strengthen field management, increase fertilizer, pay attention to drainage in the rainy season, and improve the disease resistance of plants.

It is very likely that the plant lacks nutrients, nitrogen fertilizer and potassium fertilizer should be supplemented in time to promote the growth of plant rhizomes, or it is possible that the plant has pests and diseases, and plant special insect repellent should be used to spray evenly on the plant leaves.

Garlic leaf tip dryness is caused by root rot, leaf spot, herbicides, and other factors. The drying of garlic leaf tips in different periods is related to different factors. Garlic leaf tips generally dry up at the seedling stage (October) and regreening stage (March of the following year).

Garlic sprouts tip dry cause.

The drying phenomenon of garlic seedling tips is caused by physiological factors, the main reason is high temperature, coupled with the cultivation of plastic film covering, the temperature under the plastic film is high, the garlic roots and rhizomes are scorched, the nutrient absorption is blocked, and the leaves do not get enough nutrients, resulting in the drying of the leaf tips and even death. Autumn sowing should not be too early, and the film should be removed in time.

Leaf tip wilting occurred in the early spring garlic rejuvenation stage, which was mainly caused by root rot, and garlic root rot was mainly caused by bacterial infection. After being infected with bacteria, the primary roots rot from the root tip to the base, and then the secondary roots decay one after another. Some plants rot along with garlic.

Rotten places have a foul smell and can easily cause maggots and other parasites. The leaves of the diseased plant turn green and yellow, starting from the tip of the leaf and rotting along the veins. The plants are short and the growth and development of diseased plants are out of balance.

In addition, the phenomenon of dry garlic leaf tips in spring is mainly related to the fact that garlic planted after corn harvest does not carry out the necessary disinfection of the soil. After the root rot pathogen accumulates in the soil for many years, the root rot occurs severely, and the stem tip appears dry tip. Garlic should be disinfected before sowing to prevent the occurrence of dry garlic leaf tips in spring.

Prevention and control methods. A month before the sowing of garlic in September, at least 20 cm of deep ploughing should be carried out. Shallow rotary tillage is used before sowing and the soil is disinfected by spraying quicklime, biological agents and carbendazim.

The specific method is to use 150 grams of 77% Dunin wettable powder for every 100 kg of garlic cloves, add 8 kg of water, spray the garlic seeds evenly, dry them and sow them. Garlic root rot occurs for a long time. In the early stage of the disease, 30 90 ml of longan (20% copper sulfate suspension) can be sprayed or root irrigated with 40 60 kg of water, or disinfected (50% chlorobromoisocyanuric acid wettable powder) per mu 30 60 grams with 50 kg of water sprayed or root irrigation, 1 time every 5 days, 2 3 times of continuous control.

Diseased and dead plants with serious diseases should be uprooted and taken out of the field in time to prevent the spread of diseases.

There are many reasons, such as infection with bacteria, or due to insufficient fertility, or it may be caused by lack of water.

This is due to the cause of the disease, or it is caused by the fact that it is very dry, depending on the specific variety.

It may be due to a lack of water, sometimes the temperature is too high and the leaves will dry out, or there may be poor growth.

Now every family likes to eat garlic, because garlic has a unique taste, in fact, garlic is also divided into many varieties, if the variety is not good, it will lead to a lot of problems.

The importance of garlic varietiesMany garlic farmers do not know the importance of garlic varieties, and they have been planting garlic varieties for many years, which means that many garlic varieties have been planted for many years.

It is important to know that if a crop is planted on one piece of land all year round, there will be many kinds of pests and diseases, so it is important to choose what kind of garlic species.

So what kind of garlic seed should we choose, according to the experience of our hometown farmers, we should choose the kind of garlic seed that is slightly reddened by the root, and the garlic seed must be selected with roots, and the garlic seed must not be planted if there are no roots.

Good garlic seeds are resistant to pests and diseases and have high yields.

What are the diseases in the growth period of garlic, and how do they cause garlic in the growth period, the most common is the dry tip, (the dry tip is often called the dead leaf disease in our hometown) and root rot, these two diseases are the most common.

Let's talk about garlic dry tip leaf blight, mainly when planting garlic without careful management of the soil and garlic treatment, garlic planting must be soil disinfection and sterilization, deep ploughing, and then leveling the soil to be conducive to planting garlic.

Another reason is that the garlic is not fertilized in time during the large growth period, resulting in the garlic not being supplied with nutrients in time during the vigorous growth period, resulting in the phenomenon of dry garlic tips.

How to prevent this phenomenon from occurring

The best way to prevent diseases is to prevent them in advance, which means working on soil management and garlic seeds.

There is also to observe the leaves and roots of garlic in time, if you find that there are black spots on the roots, you should pull out the garlic seedlings in time to prevent continuous infection with germs.

Fertilization must be applied without delay, and timely watering according to weather and climate conditions can be prevented in advance.

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There are three types of dried tips of garlic yellow leaves.

The first kind, garlic should not be heavy stubble, generally can not be more than two years when continuous cropping, once the heavy stubble continuous cropping for more than two years will appear degradation phenomenon, not only the yield and quality will be lower year by year, and the leaf tip of the garlic seedlings will also be yellowed early, and then will gradually spread upward, resulting in a large area of yellow leaves of garlic seedlings.

Prevention and control measures: heavy stubble yellow leaves are generally manifested in weak root growth, for this situation, on the one hand, it is necessary to top dress, promote the growth and development of roots, and then spray plant growth nutrient solution, such as 2003, Bihu, etc., can also promote root growth, alleviate the phenomenon of yellow leaves.

Second, underground pests, garlic common underground pests are root maggots, grubs, ground tigers, etc., they often bite off the root system of garlic, and even eat in the garlic cloves, causing the garlic cloves to rot, so it leads to the occurrence of yellow leaves in the above-ground parts.

Control measures: In this case, you can use 80% dichlorvos 1000 times liquid, 50% phosphine emulsifiable concentrate 800 times to irrigate the roots and branches, or use 50% phosphine emulsifiable concentrate per mu to mix into medicine*, sprinkle between the rows, and then irrigate, so that the drug can seep into the ground with water to prevent and control insect pests.

The third is the phenomenon of mother-withdrawal, which is a normal physiological phenomenon, which indicates that the storage and nutrition of garlic have been exhausted, and it is about to sprout and bloom.

Prevention and control measures: Therefore, before the garlic is sown 30-40 days before the mother, 20-25 kg of urea and 15-20 kg of potassium sulfate should be applied per mu, and 3-5 kg of special compound fertilizer for garlic can be added if possible. If chemical fertilizer is not used, it can be directly applied with well-rotted high-quality farmhouse fertilizer of 2000-5000 kg per mu.

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The dried and yellow leaves of garlic are blindly applied with fertilizer because of wrong judgment, and the management methods in the planting field are not in place and unreasonable. Resolved:1

Avoid heavy cropping and plant new crops every year. For the plots with dry tip yellowing or serious pests and diseases, garlic should be planted after 2-3 years of rotation crops, and the rotation crops can choose corn, rice, cabbage, leeks, celery, etc., or beans, nightshades, melons and other crops. 2.

30-40 days after sowing and 5-7 days before the arrival of the "mothering period", water and fertilize in advance. After fertilization, it is necessary to pay attention to timely watering, which can effectively solve the problem of "returning mothers and turning into dry tips". 3.

For plots with serious yellow leaf dry tips, foliar fertilizer can be sprayed with about 40 grams of potassium dihydrogen phosphate per mu. 4.Scientific fertilization.

Adhere to the principle of "decomposing organic fertilizer or biological bacterial fertilizer, supplemented by chemical fertilizer", increasing phosphorus and potassium fertilizer in an appropriate amount, controlling the amount of nitrogen fertilizer, and paying attention to the spraying and supplementation of medium and trace element fertilizers such as phosphorus, magnesium, boron and zinc. 5.Pay attention to soil moisture and avoid high temperatures, pests and diseases.

Garlic planting should avoid heavy planting, for the dry tip yellowing or more serious pests and diseases of the plot, the implementation of rotation measures and then plant garlic, pay attention to not with the same family of crops rotation, to avoid aggravating soil damage, pests and diseases cross-invasion.

Solution: After sowing, water appropriately to ensure the moisture of the soil; crop rotation and crop change, targeted topdressing; Choose the right time to sow (around 20 sowing); Do a good job in the prevention and control of underground pests such as garlic maggots.

You can pour some nutrients on the soil of garlic, and also add more water and apply some organic fertilizer to garlic at ordinary times, so that it can be a good solution.

Garlic yellow leaves dry tip may be heavy planting, sowing too early, suffering from pests and diseases, lack of nutrition, breeding garlic to take the method of crop rotation, choose the early crop for watermelon, rice field planting garlic, and sow when the temperature is 12 degrees, but also to provide compound fertilizer, supplement nutrition.

1. Heavy planting

The dried tips of the yellow leaves of garlic may be the reason for heavy planting. Heavy planting will lead to a decrease in the nutrients required by garlic in the soil, resulting in poor growth of the second batch of garlic, it is best to take the method of crop rotation when planting, and choose the field that has been planted with watermelon and rice in the early stage to plant garlic.

2. Sowing too early

The dried tips of the yellow leaves of garlic may be the reason for sowing too early. Garlic likes a warm environment, and the ambient temperature is too low when sowing too early, which will affect the growth of garlic seedlings, so it is best to choose a time period when the temperature is about 20 degrees for planting garlic, so as to facilitate the smooth germination and growth of garlic seeds.

3. Pests and diseases

The dried tips of the yellow leaves of garlic may be the result of suffering from pests and diseases. Garlic disease resistance is strong, but in the process of breeding, to provide raw fertilizer, it will lead to fly maggots to invade garlic, so that the phenomenon of yellow leaves dry tips, should be sprayed for garlic in time to kill maggots, and the serious disease of garlic seedlings cleaned.

4. Insufficient nutrition

The yellow leaves of garlic are dry and pointy, which may be due to nutritional deficiencies. In the process of garlic growth, the demand for nutrients is greater, and too little fertilization will lead to weak plant growth and yellowing of leaves, so it is necessary to mix nitrogen fertilizer, phosphorus and potassium fertilizer into the garlic planting soil, and water water to the field, so that the plants can absorb balanced nutrients.