Symptoms and Control methods of Common Diseases and insect pests of Camellia how to grow Camellia Seeds

Camellia has large flowers and bright colors, so it can be regarded as a leader in the flower world and is deeply loved by everyone, so many friends will plant a pot at home, but after planting it for a period of time, they will find that it is either affected by pests or other problems. then, the following editor will introduce its common diseases and insect pests and solutions.

Common symptoms of diseases and insect pests in camellias

1. Anthracnose: this disease is one of the common diseases of camellia, which usually occurs on the leaves of flowers and seedlings from June to July, and the spot starts from the leaf tip or leaf edge. At the beginning, water-stained green-brown disease spots appeared at the edge of the basal leaves, and then expanded into a layer of small black spots arranged in irregular large stripes to spread to the whole leaf, and finally caused the leaves to fall off.

2. Soot disease: this disease can damage branches and leaves, especially on leaves. At the initial stage of the disease, soot-like mildew spots appear in the disease part, and then gradually expand and connect with each other into pieces, so that most of the plants are covered by soot-like mildew layer. After parasitism, the pathogen not only absorbs the nutrients of flowers, but also seriously affects the photosynthesis and respiration of plants, resulting in a large number of fallen leaves.

3. Root knot nematode disease: this disease harms the roots of camellias, making them dark brown and root nodules rot and break. The main root was enlarged, the new beard was not born, and the ground plant stopped growing, which gradually led to the death of the whole plant.

Ways to solve diseases and insect pests

1. Anthracnose: first of all, strengthen cultivation and management, pay attention to the application of organic fertilizer and phosphorus and potassium fertilizer, improve plant disease resistance, remove diseased leaves and burn them in time, and then spray 1% Bordeaux solution after spring shoots grow to prevent bacterial infection. finally, at the initial stage of the disease, 65% Dysen zinc wettable powder was sprayed with 600 times aqueous solution or 70% methyl Toll wettable powder 1000-1500 times.

3, soot disease: first of all, do not plant too dense, keep the plants in good ventilation and light transmission, and then do not make the humidity too high to control the conditions for the growth of germs. finally, during the onset of the disease, spray Baume 0.3 degree stone-sulfur mixture, once every 10 times 15 days, a total of 3 times, can also be sprayed with 50% Topchin wettable powder 500 times liquid spray, 7 times every 10 days, spray 3 times, can achieve the therapeutic effect.

3. Root knot nematode disease: disinfect the culture soil before potting, kill the pathogenic worms, and then change the basin with the sterilized culture soil as the basin soil immediately after discovering the patient. finally, before changing the basin, the basin soil can be reused in the sun factory for 3 days, and the soil can be disinfected with a solution made of dibromochloropropane and 100 times water, but the soil after using this drug must be stacked for 20 days before being planted in the basin. Otherwise, it will damage the root system.

How to plant camellia seeds

1. Seed harvest: camellias are harvested immediately when the fruit is slightly cracked in autumn, put in a cool and ventilated place to dry, and the seeds are taken out after the fruit is naturally cracked. It is necessary to sow seeds immediately after seed collection, and it can also be treated by stratified sand reservoir.

2. Seed treatment: the seed coat of camellia is hard and needs to be treated in order to make the seeds germinate quickly and neatly. The seed coat can be cut with a sharp knife, then soak the seeds in 40-50 ℃ warm water for half an hour, then soak them in 20-25 ℃ water for 5 days, and take the bottom seeds.

3. Sowing method: when sowing camellia seeds, put the navel to the side, cover with a layer of fine fertile soil and cover with a layer of plastic film to keep the soil moist, so that the seeds can germinate and emerge as soon as possible.

How to spend the winter with camellias

1. The most suitable temperature for camellia blooming is 10 ~ 20 degrees Celsius. If the temperature is too low, the growth of buds will be limited, so it is necessary to warm up properly in winter.

2. Add appropriate amount of light to avoid freezing the camellias.

3. Water suitable for camellias. It is best to irrigate with stored Rain Water. If it is tap water, ferrous sulfate needs to be added to the water to form an aqueous solution of 0.1% to 0.2% concentration.

4. In winter, water should be watered every 3-5 days, preferably around 10:00 in the morning.

If you want to plant camellias well, there are still many tricks, such as dealing with seeds before planting, watering and fertilizing, and so on. It seems that you still need to make a lot of efforts to see beautiful camellias. However, some tips introduced by the editor are very helpful to the growth of camellias, so don't be afraid.