What are the diseases of colored calla lily Common disease prevention and control methods of colored

Bacterial soft rot causes infected leaves and stems to turn dark green, with necrotic spots and mucus, and eventually the plant lodging. At the same time, the tubers begin to rot and have a foul odor. When the plant does not grow well, it can cause infection through small wounds.

If the plant is dry, the infected plant and the soil in which it grows should be carefully removed. It should be noted that the infected tubers should be picked out as early as possible before planting and disinfected with lime water for prevention. In general, yellow and orange varieties are more susceptible to the disease than white and cream varieties.

The growing environment of colored calla lilies should provide sufficient water, do not plant too shallowly, and water when the soil is dry; The drainage performance of the soil should be good; Don't use too much nitrogen fertilizer; The tubers should be dried as soon as possible after harvesting.

Pythium is a fungal disease that causes root rot and limits the plant's ability to absorb water. Crop rotation and precise irrigation and drainage are important factors in preventing infection. The soil is steam sterilized and treated with fungicides before planting.

Penicillium disease mainly causes damage to the tuber during and after storage, especially when the tuber has been mechanically damaged, the relative humidity of the storage room is too high, or the air flow in the microenvironment is insufficient. Providing adequate air movement can prevent the germ from developing. Fungicides can also be used to disinfect tubers, such as clodidan.

Botrytis can occur on flowers and leaves. When cultivating in the open air, it is necessary to carry out the combination of fungicide and insecticide prevention every 10 days. It is enough to take a dose of medicine at the end of August or early September.

The main pests of colored calla lilies are thrips and aphids. Because aphids can transmit viruses, control is important. Generally, insecticides such as imidacloprid and Wanling are used for control.

The main disease is bacterial soft rot, which has an appropriate temperature of 25. The tuber quickly softens and decays after being damaged, producing a foul odor, and the aboveground part is yellowed and withered. Because the disease is not easy to prevent. Therefore, prevention is the main priority.

When cultivating, the bulbs are required to be sterile, the production area is strictly disinfected, sterile media is used, and the greenhouse ventilation is strengthened during production. Rinse the roots with 2000 times rhizome once every two weeks. Through environmental regulation and water and fertilizer management, plant resistance can be enhanced.

If the diseased plants are found, they should be removed in time and sprayed with agricultural streptomycin.

1. Colored calla lily has a fleshy earth stem, long roots at the nodes, and the rhizomes are relatively developed and thick. The leaves are stemmed, the leaves are ring-shaped or halberd-shaped, sharp and shiny in segments, the whole margin, and most species have transparent black spots on the leaves. The inflorescence has a large and medium-sized Buddha flame bud funnel-shaped, like a horseshoe with a sharp tip and a curl at the tip.

2. The Buddha flame bud is different according to the species, with different hues, white, pink, yellow, purple, red, orange, green and other colors. There are thousands of flowers in the **** of the Buddha flame bud, which are composed of fleshy spikes, and the inflorescences are pale yellow and light green cylindrical.

3. The flowering period of the colored calla lily is relatively long, and the general flowering period is from the end of December to April of the following year, and the flowering period is from February to March. The flowering period at the southern end of the Xiangjiang River is from December to March of the second year. The flowering period of colored calla lilies is affected by temperature and light, and it can be used to provide flowers for anniversaries by manipulating temperature light.

4. Colored calla lilies love the sun and must have abundant light in winter. Protect from direct sunlight in summer. Colored calla lilies are more stringent on water regulations, to prevent too much drought, and too much water will easily cause root rot.

It is the standard for several small waterings. Colored calla lilies do not have much regulation on ambient humidity.

Colored calla lilies are not only significantly different from white-flowered calla lilies in morphology, but also have different habits. The vegetative bodies of colored calla lilies are tubers and bulbs, while the vegetative bodies of white calla lilies are rhizomes. So, what are the common sense of cultivation of colored calla lilies?

The following florist uncle invited the author [Flower Edge] to introduce some common sense of colored calla lily cultivation.

1. Growth habits.

White-flowered calla lily is easy to cause dormancy in summer, and color calla lily is easy to dormant at low temperature in winter, the most suitable temperature for the growth of color calla lily is similar to that of white-flowered calla lily, but the requirements for cultivation temperature at night in winter are higher than that of white-flowered calla lily, generally not lower than 16, the lowest safe temperature for wintering should be controlled above 6, the minimum temperature during the growth period should not be lower than 13, and the maximum temperature or soil temperature should not exceed 25.

2. Illumination. The lush growth and flowering of colored calla lilies require adequate light. And light also has a great influence on the color of the flower, enough light not only makes the color more vivid, but also prevents the stem from growing too long.

Colored calla lilies tend to weaken and bloom less in high temperature and low light conditions. Colored calla lilies love sunlight, but they don't like strong direct sunlight. For home potted plants, the pots should be placed in a bright place, as insufficient light will also affect flowering.

Proper shade should be given in the summer heat and bright light.

3. Temperature and watering.

The relative air humidity of colored calla lilies is 65%-75%, and the relative humidity should be prevented from falling below 50%.

The roots of colored calla lilies are tubers or bulbous, so the soil requirements should not be too wet, and potted colored calla lilies ensure that they are watered evenly. Be careful not to dry out and overwater, as this can lead to root and overall growth problems. What we want to water is thorough and continuous.

Watering is better in the morning as well. When too much water can cause root problems, the roots grow well and are white. When you see gray roots, there is something wrong with them and it will cause the roots to rot.

4. Nutrients and fertilization.

Colored calla lilies require more potassium fertilizer, so some fertilizers with higher potassium content are applied in the growth of too much.

Tips] Colored calla lilies have a natural dormancy period of about three months at the end of each growth cycle and after the leaves wither, during which we rent slag to control watering. When the dormant period has passed, we can dig up the bulbs and replant them, and soak the bulbs with 50 100 mg of gibberellin for 5 10 minutes for 5 10 minutes before planting to increase the number of flowers. Planting should be with the buds facing up, after planting, depending on the humidity of the surface of the pot, watering once or twice, in the week after planting to prevent dehydration, and also to avoid too wet.

Water the colored calla lily regularly every day, which is helpful for its root growth. The amount of watering should be small each time to avoid the cultivation medium being too wet, and frequent watering should be done during the growth period to maintain the slightly moist state of the substrate.

It is enough to provide it with soft astigmatism, and the sunlight in spring, autumn and winter is not very strong, so it can be placed directly in the sun. But in the summer, it is necessary to shade it from the sun and not be exposed to direct sunlight.

The plant does not need nutrients for the winter at the beginning, and when it reaches the growing season, it needs to be topdressed 2-3 times, and organic fertilizer can be applied to it. It should be properly fertilized when it first enters the flowering stage, but it should not be fertilized after the full flowering period, and it should be better dormant.

During the rooting period, the temperature should be maintained at around 16. It should be given a growth environment of 18-25 years when breeding, and the minimum temperature at night should not be lower than 13. The temperature in summer should not be too high, and you need to do a good job of cooling down when it is too hot.

During the maintenance period, it is necessary to ventilate more and create a ventilated growth environment for it, otherwise it is easy to have pests and diseases, and it will also affect the flowering of plants. Ventilation can be done in winter, but it should be strengthened in the hot and humid summer.