Control methods of common diseases and pests of calla lotus

Calla lily

Calla lotus is also known as Cigu flower, taro, water taro, its leaves are emerald green, the flower heart is very prominent and white, and its shape is very special. It likes a moist and sunny living environment. It is widely cultivated in many areas, and its flowering period is as long as 6 months. However, in the process of breeding calla lilies, we often encounter the disturbance of diseases and pests. Let's talk about the common disease and pest control methods of calla lotus.

1. Soft rot of calla lilies

The soft rot detached from the plant close to the surface, causing the leaves to wither upward, causing the succulent tubers to produce bony soft rot on millet, the roots also rotted, and the whole plant suddenly wilted and died. The edge of the leaf is damaged and becomes soft and wet-rotten. The pedicel is invaded, the flower turns brown, the pedicel soft rot falls off, the bacterial disease.

Prevention and cure method

1. During harvest, the diseased corms were removed and treated with 40% formaldehyde 55 times solution for 1 hour before drying.

two。 It was found that the diseased plant was removed and burned in time, and the soil was disinfected with 40% formaldehyde 40 times solution around the diseased plant.

3. The depth of tuber planting should not exceed 5 cm to avoid excessive water supply.

2. Leaf spot of calla lily

There are three kinds of fungi causing the leaf spot disease of Zantedeschia horseshoe, among which the occurrence of leaf spot is more common. At the initial stage, the disease spot on the leaf is small, nearly round, gray-white, gradually expanding and showing irregular large rotten spots, sometimes infecting flowers and pedicels.

Prevention and cure method

1. Remove the residue of diseased leaves in time to avoid excessive water supply. Do not water the plant directly.

two。 Spray 1000-1500 times of 25% enemy demulsifiable oil or 80% of Dasheng 500 times at the time of onset, once every 7-15 days, 2-3 times in a row.

3. Root rot of calla lily

Symptom

Root rot often occurs when calla lilies are close to flowering. Generally, the lower or outer leaves of the plant are the first to turn brown and wither, and the disease continues to develop and spread to the inner leaves. An open flower whose tip turns brown and sometimes develops all the way to the petiole and pedicel and the flower is deformed. Pull up the diseased plant, you can see that many roots have rotted, the rest of the root is water-stained soft rot, leaving only the epidermis, showing a hollow tube. The disease gradually spread from the absorbing root to the rhizome, and finally the rhizome showed spongy dry rot.

Pathogen and pathogenesis: the root rot of calla is caused by Phytophthora infestation in fungi. The pathogen survives in soil, which is a kind of harm transmitted by soil, which is referred to as soil-borne disease.

Prevention and control measures

1. Rhizome disinfection thoroughly remove the disease spot on the rhizome, after drying, soak in warm water at 50 degrees Celsius for 1 hour, or soak in 1% peracetic acid solution for 10 minutes before planting. Sterilized rhizomes begin to grow more slowly than untreated ones, so it is best to plant them half a month in advance.

two。 Soil disinfection sick soil and pots must be sterilized by heat before they can be reused. The soil can also be sprayed with a 0.4% concentration of 70% soil bacteria wettable powder, but it must be treated before planting.

Calla lily

IV. Calla lily virus disease

There are two symptoms of calla lotus virus. Mosaic symptoms are typical mosaic of diseased plant leaves, shrinkage and distortion of leaves, white spots or ring spots, chlorotic ring spots or stripes near leaf veins, twisted leaves, white spots on small pedicels, light spots on flower buds, mosaic disease can be transmitted by juices and peach aphids.

Prevention and cure method

1. The disease-free mother plant was selected to propagate, and the diseased plant was pulled out and burned in time during the growing period.

two。 During the whole growing period, 50% marathon 1000 times or 2.5% deltamethrin EC 3000 times were used to control aphids and thrips.

5. Insect pests

Two-point spider mite: alias cotton red spider, host sunflower, calla lily, rose, peach, asparagus, wax plum, peacock grass, hibiscus, rose and so on. Two-spot spider mites absorb leaf juice on the back of the leaves, light leaves turn red, such as fire, heavy leaves fall.

Prevention and cure method

1. Remove the diseased leaves and deal with them centrally.

two。 Spray 1000 times of dicofol, or 2000 times of 20% dicofol, or 1500 times of Icas.

In daily life, do a good job in the basic maintenance and management of calla lilies, watering, fertilization, adequate light, generally there will not be serious major problems, to the flowering period will certainly be dazzling. It is hoped that the introduction of this text can help the flower friends who breed calla lilies.

Introduction to the control methods of common diseases and insect pests of calla lotus also known as water taro and Guanyinlian, it belongs to perennial root plants and flowers of Araceae. The leaf is green, the shape is peculiar, the pedicel is roughly as long as the leaf, and the flower bract is white and large, just like a horseshoe, the florescence lasts for more than 6 months. This article focuses on introducing the disease and pest prevention knowledge of calla lilies for the majority of flower friends' reference and learning. 1. Disease 1. Calla lily soft rot: the soft rot detached from the plant near the surface, causing the leaves to wither upward, the succulent tubers to produce bony soft rot on millet, the roots also rotted, and the whole plant suddenly wilted and died. The edge of the leaf is damaged and becomes soft and wet-rotten. The pedicel is invaded, the flower turns brown, the pedicel soft rot falls off, the bacterial disease. Prevention and control methods: (1) when harvesting, remove the diseased corms, treat them with 40% formaldehyde 55 times solution for 1 hour and then store them. (2) the diseased plant was removed and burned in time, and the soil was disinfected with 40% formaldehyde 40 times solution around the diseased plant. (3) the planting depth of tubers should not exceed 5 cm to avoid excessive water supply. 2. Calla lotus leaf spot disease: there are three kinds of fungi causing calla lotus leaf spot disease, among which the occurrence of leaf spot is more common. At the initial stage, the disease spot on the leaf is small, nearly round, gray-white, gradually expanding and showing irregular large rotten spots, sometimes infecting flowers and pedicels. Prevention and treatment methods: (1) remove the residue of diseased leaves in time to avoid excessive water supply. Do not water the plant directly. (2) spray 25% enemy emulsifiable concentrate 1000 murine 1500 times, or 80% Dasheng 500 times, once every 15 days for 3 times in a row. 3. Calla lotus virus disease: calla lotus virus shows two symptoms: mosaic symptom is typical mosaic of diseased plant leaves, leaf shrinkage and distortion, white spot or ring spot, chlorotic ring spot or stripe near leaf vein, twisted leaf, white spot on small pedicel, light spot flower deformity on flower bud, mosaic disease can be transmitted by juice and peach aphid. Prevention and control methods: (1) select disease-free mother plants to propagate, and when diseased plants are found in the growing period, they are removed and burned in time. (2) during the whole growing period, 50% marathon 1000 times or 2.5% deltamethrin EC 3000 times were used to control aphids and thrips. 4. Botrytis cinerea: the leaves, pedicels and flowers of calla lilies will suffer. When the leaves are damaged, they produce yellowish green to dark green water-like plaques, which gradually expand, soft and rotten when they are wet, and gray and khaki mildew layers are produced in the affected part. After drying, the diseased spot was brown and withered, and the damage on the pedicel and petals also showed water-burst discoloration and gradually enlarged and rotted. The pathogen of the disease is a fungus of the genus Vitis. Prevention and control measures: prevention and control of Botrytis cinerea should first prevent indoor excessive humidity, strengthen ventilation, and remove diseased leaves in time to avoid contact with infection. It can also be sprayed if necessary; 50% carbendazim 500 times or 75% chlorothalonil 500 times can be sprayed. 5. Mosaic disease: this disease is a typical mosaic symptom, the leaves of the diseased plants are shrinking, obviously deformed and twisted. The flowers of the diseased plant are so small that they can't even spread out normally. The pathogen of horseshoe lotus mosaic disease is taro mosaic virus, its juice can be transmitted, and the diseased plant can not be used as breeding material. Second, insect pests two-point spider mites: alias cotton red spider, hosts are sunflower, calla lily, rose, peach, asparagus, wax plum, peacock grass, hibiscus, rose and so on. Two-spot spider mites absorb leaf juice on the back of the leaves, light leaves turn red, such as fire, heavy leaves fall. Prevention and control methods: (1) removal of diseased leaves and centralized treatment. (2) spray 1000 times of dicofol, or 2000 times of 20% dicofol, or 1500 times of Icas. The control methods of red spider and thrips were sprayed with 1000 times of 50% ethyl acaryl alcohol and 4000 times of 2.5% deltamethrin EC respectively. Conclusion: the above is the knowledge about the prevention of diseases and insect pests of calla lilies. I hope it will be helpful to the flower lovers who grow calla lilies. Control of common diseases and insect pests of calla lotus

I. Diseases

1. Calla lily soft rot: the soft rot detached from the plant close to the surface, causing the leaves to wither upward, the succulent tubers to produce bony soft rot on millet, the roots also rotted, and the whole plant wilted suddenly and died. The edge of the leaf is damaged and becomes soft and wet-rotten. The pedicel is invaded, the flower turns brown, the pedicel soft rot falls off, the bacterial disease.

Prevention and control methods:

The main results are as follows: (1) during harvest, the diseased corms were removed and treated with 40% formaldehyde 55 solution for 1 hour before drying.

(2) the diseased plant was removed and burned in time, and the soil was disinfected with 40% formaldehyde 40 times solution around the diseased plant.

(3) the planting depth of tubers should not exceed 5 cm to avoid excessive water supply.

2. Calla lotus leaf spot disease: there are three kinds of fungi causing calla lotus leaf spot disease, among which the occurrence of leaf spot is more common. At the initial stage, the disease spot on the leaf is small, nearly round, gray-white, gradually expanding and showing irregular large rotten spots, sometimes infecting flowers and pedicels.

Prevention and control methods:

(1) remove the residue of diseased leaves in time to avoid excessive water supply. Do not water the plant directly.

(2) spray 25% enemy emulsifiable concentrate 1000 murine 1500 times, or 80% Dasheng 500 times, once every 15 days for 3 times in a row.

3. Calla lotus virus disease: calla lotus virus shows two symptoms: mosaic symptom is typical mosaic of diseased plant leaves, leaf shrinkage and distortion, white spot or ring spot, chlorotic ring spot or stripe near leaf vein, twisted leaf, white spot on small pedicel, light spot flower deformity on flower bud, mosaic disease can be transmitted by juice and peach aphid.

Prevention and control methods:

The main results are as follows: (1) the disease-free mother plant is selected for culture, and the diseased plant is pulled out and burned in time during the growing period.

(2) during the whole growing period, 50% marathon 1000 times or 2.5% deltamethrin EC 3000 times were used to control aphids and thrips.

II. Insect pests

Two-point spider mite: alias cotton red spider, host sunflower, calla lily, rose, peach, asparagus, wax plum, peacock grass, hibiscus, rose and so on. Two-spot spider mites absorb leaf juice on the back of the leaves, light leaves turn red, such as fire, heavy leaves fall.

Prevention and control methods:

(1) removal of diseased leaves and centralized treatment.

(2) spray 1000 times of dicofol, or 2000 times of 20% dicofol, or 1500 times of Icas.