What disease does saffron leaf curl in? What do the leaves of saffron look like

The stigma of the wet safflower is reddish-brown, oily and shiny, slender and linear, about 3 cm long, narrower at the base, gradually widening towards the apex, with a short fissure on the inside, and the apical edge is unevenly toothed. The stigma is often alone, and sometimes three stigmas are connected to a short colossal column. The flower column is orange-yellow.

When immersed in water, the stigma expands and expands, taking on a long trumpet shape, and the water is dyed yellow. The smell is sweet and bitter. It is better to be moist and shiny, red in color and less yellow silk.

Dried safflower is curved filamentous, dark reddish-brown with yellowish-brown parts. Relaxed, matte and oily. The rest is the same as wet safflower. The above-mentioned medicinal materials are produced in Spain, Greece and the Soviet Union.

Dosage. decoction, 1 2 money; or soaked in wine.

pharmachologic effect. The effect of the decoction on the uterus of mice, guinea pigs, rabbits, dogs and cats in vitro uterus and the uterus in place have an excitatory effect, a small dose can make the uterus tense or rhythmic contraction, a large dose can increase the uterine tension and excitability, the automatic contraction rate is enhanced, and even reaches the degree of spasm, and the pregnant uterus is more sensitive; In the rabbit uterine fistula experiment, the stimulant effect was also seen, and the effect could last for 4 hours after 1 dose. The order of action intensity of the various extracts is as follows:

Decoction "ethanol extract" "volatile components" ether extract. Small doses can also inhibit the uterus, or inhibit first and then excite, especially when ethanol extract is applied to the uterus of unpregnant rabbits, the inhibition phenomenon is more common. The effect of uterine excitation can be partially blocked by ergotoxin ethanesulfonate (an adrenergic blocker), but not by atropine; Therefore, it is believed that part of the effect on the uterus is a direct effect on uterine myocytes, and part is related to adrenergic receptors.

Saffron can grow proudly in the snow and ice, but when it is suddenly moved to a greenhouse, it is inevitable that it will be delicate. Saffron is not immune to pests and diseases, the following is an introduction to common pests and diseases of saffron and how to control them!

Common diseases of saffron (crocus) and their control.

Saffron disease - Sclerotinia sclerotinia disease.

Disease. Sclerotinia sclerotinia mainly harms bulbs and seedlings, and improper storage of bulbs in summer is prone to lesions, which make the whole bulb rot.

Prevention and control methods. Injured or diseased bulbs should be removed from bulbs to prevent bulb deterioration and infection and spread of germs.

Then spray 500 times of 50% tobuzin wettable powder for control.

Saffron. Saffron disease - mosaic disease.

Disease. Mosaic disease is characterized by distorted leaf shape, yellow streaks on leaves, dwarfing plants, and irregular necrotic spots or streaks on leaves in the later stage. The diseased plants showed small flowers during the flowering period, and the plants with severe disease basically did not bloom.

Once the plant is infected, it is difficult to be the first plant, it will accompany it for a lifetime, and with the growth time, the diseased plant bulb will become smaller year by year, and finally lose its value.

Precautionary measures. When planting, choose excellent bulbs. It is highly resistant to disease and has no lesions on the epidermis of the bulb.

During the maintenance process, disinfectants are often sprayed to sterilize, and the plants are placed in a cool and ventilated place for maintenance. Timely replenishment of nutrients to enhance the disease resistance of plants.

Saffron. Saffron disease - rust.

Disease. Rust mainly harms the leaves of saffron, and occurs more on the back of the leaves, and rust-colored spots appear on the leaves, which affects the ornamentation.

Prevention and control methods. Disinfect the seeds or bulbs before planting and dress them with 15% powder. During the maintenance period, phosphorus and potassium fertilizers are applied to promote the robustness of plants and improve disease resistance.

Clean up the dead branches and leaves in time, and cut off the residual flowers after flowering every year. And if the diseased leaves are found, they should be removed in time to avoid infecting other plants.

At the beginning of the disease, spray 15% powder rust 500 times solution 1 2 times; During the onset of the disease, spray 300 400 times of 97% sodium dirust, spray 1 time every 10 days, and spray 2 3 times in a row.

Saffron. Saffron disease - root rot.

Disease. Infected by root rot fungus, it can occur in the whole growth stage, especially at the seedling stage and flowering stage. After the onset of the disease, the plant wilts, is light yellow in color, and finally dies.

Prevention and control methods. If the diseased plants are found, they should be uprooted and burned in time to prevent infection to the surrounding plants, and some quicklime or carbofuran should be sprinkled in the holes of the diseased plants. It is recommended that after the plant has rotten roots, change the soil and replant other plants.

The cause of plant leaf curling disease may be caused by high temperature, drought, lack of water, or it may be caused by excessive fertilization, or it may be caused by disease, lack of trace elements, or caused by low temperature frost damage, long-term drought watering, and pesticide damage.

1. High temperature, drought and water shortage: If the crop encounters continuous high temperature and drought weather but does not get timely water replenishment during the growth process, the plant stomata will be closed and the leaves will be curled.

2. Pesticide damage: If the concentration of the drug is too large when spraying the drug, pesticide damage will occur, the surface of the leaf will be discolored or spotted, and the leaf will also be curled.

3. Excessive fertilization: If the amount of fertilizer is used too much, the soil concentration will be too high, and the nutrients will not be able to penetrate into the roots for the plants to absorb, hindering the roots from absorbing water, thus making the leaves lack water, causing the leaflets to turn over and roll up.

4. Lack of trace elements: When the plant is seriously deficient in some trace elements, it will also cause the symptoms of leaf curling, which belongs to physiological leaf curling.

5. Disease: When the plant is infected with a viral disease, it will also cause the plant to roll up its leaves and grow in clusters. In more severe cases, there will be veins but no mesophyll.

6. Long-term drought watering: If the soil is very dry and suddenly overwatered, it will inhibit the transpiration of plant leaves, and the leaves will roll back and wilt downward out of self-protection.

7. Low temperature frost damage: When the temperature is continuously lower than 10 and below, the crop will be frost damaged, the leaves will begin to wilt, and in severe cases, the leaves will dry up, bend downward, and the mesophyll cells will freeze and whiten. The cold spring also causes the new shoot leaves to curl downward.

Leaf curls can be caused by leaf spot disease, which causes the leaves to die, with yellow spots that can also curl slowly.

During the management period, a humid and sultry environment is provided, and such environmental pathogens and pests are easy to breed, and the plants will be infestation.

If you find a pest or disease, you need to take measures to treat it. All diseased leaves should be cut off and completely destroyed to avoid further infection. It is also necessary to change the environment in which you live, move to a well-ventilated place, and strengthen ventilation. Usually let it bask in the sun more, and the amount of watering should be well controlled, not excessive.

The leaves of saffron are long and linear, the edges are slightly rolled, the color is gray-green, the length is between 15-20 cm, the flowers are shaped like a small trumpet, each flower has 6 petals, the bulb has a lot of fine hairs on the outside, and the inside is white, and the saffron is suitable for growing in an environment with good light conditions and a warm climate, and the need for water is high.

Leaf morphology of saffron.

Saffron is a perennial herbaceous plant, the leaves are basal, the shape is strip-shaped, the length is about 15-20 cm, the edge is slightly curled, there are 4-5 membranous sheaths at the base of the leaf cluster, and the color of saffron leaves is young and green, and it is gray-green when mature.

Flower characteristics of saffron.

Saffron blooms in October and November every autumn, the flowers are brightly colored, the plant shape is beautiful, shaped like a small trumpet, each flower has 6 plum petals, and the saffron will also exude a charming floral fragrance, which is deeply loved by people.

How saffron reproduces.

Saffron depends on bulbs to reproduce, mature bulbs have multiple main and side buds, you need to cut them with a knife, and wait until autumn and September, when the saffron bulbs are planted in fertile and breathable soil, and they will bud in about 3-4 weeks.

How to fertilize saffron.

Before planting saffron, it is necessary to apply thorough organic fertilizer in the soil, such as cake fertilizer, manure, chicken and duck manure, etc., after the plant takes root and pulls leaves, it can be moved every 10 days to apply a thin liquid fertilizer with balanced nitrogen and phosphorus to ensure that there are enough nutrients during the growth of saffron.

Through our introduction, we have a deeper understanding of what the leaves of saffron look like.