Cassava is cultivated all over the world. The history of cassava cultivation in China has also been hundreds of years. Its roots are rich in starch, which is one of the industrial starch raw materials and has high economic benefits. So what should you pay attention to when planting? Let's take a look.
1. Deeply change the soil
In the first month before planting, the soil should be firstly grounded, covered with soil 30-40 cm, and whitened with sunlight to make it fully weathered and thinned. This is because cassava is a deep root crop, and its root system extends downwards. If the soil is too heavy, it may cause its root growth to be poor or deformed, which is unfavorable for both yield and quality.
Therefore, before planting, the soil should be grounded and the soil loosened, which is beneficial to its production increase. In addition, 250-300 kg of decomposed farmyard manure can be applied per mu to the base fertilizer.
2, select good varieties
In order to obtain high yield, in addition to suitable soil, it is also necessary to choose high-yielding varieties with high yield and high yield. In addition, cassava contains cyanic acid toxin, so try to choose less toxic varieties. Tubers with thick stems, no pests and diseases, and no damage are selected as seed stems, and the stems are treated before planting.
3, fertilization
In order to obtain high yield, fertilization is an extremely important light. After seeding and emergence, when the seedlings grow to 12-15 cm, it is necessary to topdress in time, and thin manure should be used to promote seedling growth.
In addition to fertilization in the roots of seedlings, fertilization should be applied around the roots of the seedlings to promote rooting and accelerate the extension of the roots.
When the seedling grows to 50 cm, the second fertilizer is applied. At this time, in addition to the manure water, 8-10 kg of urea should be applied per acre, preferably with water. After entering the autumn, the roots should be exposed, and the soil should be exposed for 4-5 hours, and the soil should be cultivated after the application of phosphorus and potassium fertilizer.
Cassava is one of the three major potato crops in China. It is widely distributed in China, but there are some pests and diseases that are harmful to its yield and quality during planting. So how to prevent and control cassava pests and diseases? Let's take a look.
1. Bacterial wilt disease Bacterial wilt is also known as gum disease. It is one of the world's diseases of cassava. It is extremely difficult to control. It mainly harms the stems and leaves of cassava. In severe cases, it will reduce production by more than 50%. First, the leaf edge or the tip of the night is infested, and water-stained lesions appear. The yellow spots are also present in the lesions, and then spread from the bottom to the top, which will spread the whole leaf in a short time, causing the leaves to wither until the whole plant dies.
Control method: Firstly, the stems are disinfected and sterilized. Because there is no specific drug treatment for this disease, prevention is the main, and the agricultural streptomycin sulfate and copper hydroxide wettable microparticle powder have certain inhibitory effects. Can be used as appropriate.
2, bacterial angular spot disease usually begins in May, the incidence is more serious in August-September, the lesions appear water-stained angular spots, scattered in various parts of the leaves, the lesions will secrete yellow Latex. When the infestation of the leaf edge begins, a yellow halo appears, gradually expanding and becoming dark brown until the leaves turn yellow.
Control method: Select the varieties with strong disease resistance, clean up the diseased plants before planting, concentrate on burning, and find that the diseased plants are to remove the leaves and spray the medicine to avoid the spread of the disease.
3, brown angular spot disease is common in China, mainly harmful to the leaves, the surface of the leaves will appear irregular brown spots on both sides, in severe cases will lead to yellowing of the leaves until dry and fall off.
Prevention and treatment methods: Similar to the prevention and treatment of bacterial lesions, we must first select the varieties with strong disease resistance, and the stems should be timely prevented when they are found to be disease-free.
4. Insect cassava has many insect pests, mainly mites, thrips, red spiders, termites and chafers. When the insects break out, the yield will drop sharply.
Control methods: It is necessary to timely prevent and control pests, and comprehensively use physical control, biological control, chemical control to avoid production cuts.
This article URL: cassava planting technology and common pest control methods
Infectious diseases are caused by microorganisms, such as bacteria, viruses, fungi, and parasites.
Doctors suspect an infection based on the person's symptoms, physical examination results, and risk factors. First, doctors confirm that the person has an infection rather than another type of illness. For example, a person with a cough and difficulty breathing may have pneumonia (a lung infection). However, the person may instead have asthma or heart failure, which are not caused by infection. In such a person, a chest x-ray can help doctors distinguish pneumonia from the other possible disorders.
Once doctors confirm that the person has an infection, they usually need to know which specific microorganism is causing the infection. Many different microorganisms can cause a given infection. For example, pneumonia can be caused by viruses, bacteria, or, rarely, fungi. The treatment is different for each microorganism.
Many different types of laboratory tests can identify microorganisms. Laboratory tests use a sample of blood, urine, sputum, or other fluid or tissue from the body.
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