What is the reason for the red bean leaves under high temperature and high humidity conditions

Under high temperature and humidity conditions, the red leaves of carob may be carob leaf mold, also known as carob coal mold.

1. Symptoms:

Leaf mold mainly affects leaves, stems, vines and pods. At the beginning of the disease, purple-brown spots are produced on both sides of the leaves, and after enlargement, they appear nearly round dark brown lesions, with a diameter of 1-2 cm, and the edges are not obvious, and gray-black mold can be seen on the back of the leaf when wet, and gray-black mold can be seen on the back of the leaf when wet.

2. Prevention and control measures:

Remind you to remove the sick and remnants in time after harvesting, burn them or bury them deeply, and clean the farm; Keep the field ventilated and light-transmitting to prevent excessive humidity. Add 1 bag of Jiamei dividend + 2-3 kg of Hailibao per mu, which can improve the disease resistance of plants;

In the early stage of the disease, the diseased leaves should be removed in time, and the disease can be sprayed in time to prevent and control the disease, and 500 times of 50% carbendazim wettable powder, or 1500-2000 times of 25% difenoconazole, 1000-1500 times of scarcarbenidamine or 1000-2000 times of Xerogen, or 700-1000 times of Ruizhen pyrimidoxidine, sprayed once every 7-10 days, 2-3 times in a row.

Key points of maintenance of summer beans:

1. Selection of seeds:

Planting long beans in summer, growing in the open air, the peak season is also in the high temperature, and the rainy season is frequent, the selection of varieties is very important, although the long beans themselves have a certain heat resistance, but in the summer planting, or to choose some heat-resistant, resistant bean varieties to plant, in order to grow rapidly in the hot summer, strong resistance, withstand the hot summer temperature, so as to achieve a good harvest.

2. Soil selection:

In the hot weather in summer, try not to choose the beans that have just been planted, or some other beans planted on the land, to avoid heavy stubble on the root nature of the beans caused a lot of impact, heavy stubble planting is easy to make the beans diseased, before planting to deep turn the land, apply foot fertilizer, avoid excessive soil alkalinity, adjust the pH value of the soil, in order to grow the beans, the soil is also very important.

3. Management of water and fertilizer

The long beans themselves are drought tolerant and strong, and summer is also the season of the rainy season, the long beans planted in summer should be smoothed with drainage facilities to avoid root damage caused by stagnant water, and watering should also be carried out reasonably according to the growth of the beans and the change of weather;

In the early stage of the growth of carob, you can apply more nitrogen fertilizer, when the growth season of carob, before the flowering period, it is necessary to change the fertilization ratio, you can increase the amount of phosphorus and potassium fertilizer in an appropriate amount, like the farmer's own manure, plant ash, are very good organic fertilizer.

Running fast with a whip, exercising a lot, adrenaline chicken giant secretion, increased sweating, high temperature and dampness are not conducive to sweat evaporation, telangiectasia metabolism is accelerated, red.

After a long period of dampness and heat, the rash is covered and it becomes red.

Summary. Kiss, <>

The redness of the carob leaves is due to the following reasons:1Nitrogen deficiency:

Beans need plenty of nitrogen to grow, and if the soil doesn't have enough nitrogen, the beans will turn red. It can be solved by adding nitrogenous fertilizers to the soil. 2.

Lack of water: Beans need plenty of water to grow, and if there is not enough water in the soil, the beans will turn red. It can be solved by increasing the number of waterings or the amount of watering.

3.Pests and diseases: The redness of the bean leaves may also be due to the attack of pests and diseases, such as red spiders, aphids, etc.

Corresponding pesticides can be used to control it. 4.Insufficient light:

Beans need plenty of sunlight to grow, and if there is not enough light, the beans will turn red. It can be solved by moving the beans to a well-lit place.

How to solve the redness of the bean leaves.

Kiss, <>

The redness of the carob leaves is due to the following reasons:1Nitrogen deficiency:

Beans need sufficient nitrogen to grow, and if there is not enough nitrogen in the soil, the bean leaves will turn red. It can be solved by adding nitrogenous fertilizers to the soil. 2.

Lack of water: The beans need plenty of water to grow, and if there is not enough water in the soil, the beans will turn red. It can be solved by increasing the number of waterings or the amount of watering.

3.Pests and diseases: The redness of the bean leaves may also be due to the attack of pests and diseases, such as red spiders, aphids, etc.

Pesticides can be used to prevent hail or wax treatment. 4.Insufficient light:

Beans need plenty of sunlight to grow, and if there is not enough light, the beans will turn red. It can be solved by moving the beans to a well-lit place.

Kiss, <>

The following points need to be paid attention to in the number of plant benches:1Choose the right jujube plant:

Different plants have different growth environments and growth requirements, and it is very important to choose plants that are suitable for your home environment and your own conservation ability. 2.Provide plenty of light:

Most plants need plenty of sunlight to grow, so keep them in a well-lit area. 3.Control the amount of watering:

Plants need the right amount of water to grow, but overwatering can cause root rot, so the amount of watering needs to be controlled. 4.Provide the right temperature and humidity:

Different plants have different requirements for temperature and humidity, and the indoor temperature and humidity need to be adjusted according to the requirements of the plants. 5.Regular fertilization:

Plants need adequate nutrients to grow, so they need to be fertilized regularly.

Carob root rot, commonly known as "red root disease". This is a soil-borne disease, in which the root system is infested by pathogens in the early stage, the plant is malnourished, the bottom leaves are yellow, the plant wilts at noon, recovers in the morning and evening, and finally leads to death.

2.Trace element deficiency. The leaves at the top growth point appear yellowish-white, which is caused by iron and zinc deficiency. The yellowing of the new leaves at the top generally occurs when the new leaves are sunny after the shade, the root growth is poor, the weather changes from cold to warm, and the early plant bears too much fruit.

3.Poor plant growth. This situation will not cause the plant to die, mainly because the plant is not growing well, resulting in yellowing in the middle of the middle and lower leaf veins, which is easy to cause premature senescence of the plant.

For example, the temperature of the shed is too high, the root system is underdeveloped, the roots are damaged, and the fertilizer and water are not scientific.