The latest course on techniques and methods of sugarcane tip rot control

Sugarcane tip rot is a phenomenon that the base of infected young leaves lacks green and yellowing, which is narrower than normal leaves, and the leaves are significantly wrinkled, twisted or shortened. it is a fungal disease. The conidia of the pathogen spread to the top and heart leaves with airflow. Then the sprouts invade the base of young leaves, and then the diseased parts produce conidia and re-infect. Let's take a look at the prevention and control techniques of sugarcane tip rot.

Symptoms of sugarcane tip rot

The leaves of sugarcane tip rot plants were green and yellow at the base of infected young leaves, which were narrower than normal leaves, and the leaves were significantly wrinkled, twisted or shortened. After the aging of diseased leaves, irregular red spots or red stripes appear in the diseased part, some red tissues form irregular eye-shaped or diamond-shaped perforations, some form disease spots with dark brown edges arranged in trapezoidal shape, and dark reddish brown to black irregular disease spots are also formed at the edge and tip of leaves. Some leaves are blocked and knotted at the top. The leaf sheath was infected with red necrotic spots or trapezoidal spots. After the longitudinal section of the tip infected with the disease, there are many crimson stripes, the nodal spots are linear, and some internodes form long concave spots with transverse septum like trapezoid. The disease occurs on one side of the stem, causing the cane to bend. When the disease is the most serious, the tip rot is formed, the tissue around the growing point becomes soft and brown, and the heart leaf is necrotic, which makes the whole sugarcane die.

Incidence conditions of sugarcane tip rot

The pathogens of diseased plants and saprophytic plant residues spread with the air flow, and the conidia fell on the top and heart leaves of sugarcane, and germinated and invaded the young leaves of sugarcane under suitable conditions. The disease department produces conidia for re-infection. Sugarcane fields are prone to high temperature, high humidity, long drought, rain or too much irrigation. When nitrogen fertilizer was insufficient, plant growth was thin or partial application, and overapplication of nitrogen fertilizer, the plant tissue was tender, and the disease was serious if it grew too fast. Yuetang 54x176, Yuetang 57mobile423 and cis tang66 were more susceptible to the disease.

Control techniques of Sugarcane shoot Rot

The main results are as follows: 1. Resistant varieties such as Guitang 57max 624 and Yuetang 63xxxxxxxxxxxxxxue 237 were selected.

The main results are as follows: 1. Advocate the application of compost made by enzyme bacteria or fully mature organic fertilizer, adopt the technology of formula fertilization, and pay attention to the reasonable combined application of nitrogen, phosphorus and potassium, so as to avoid partial or over application of nitrogen fertilizer.

3. Repair the drainage and irrigation system and eliminate stagnant water in time.

4. Strengthen management, peel off old leaves in time, remove invalid tillers and dig out diseased plants.

5. At the initial stage of the disease, the severe disease area was sprayed with 1ve1ve100-fold Bordeaux solution or 30% Ludebao suspension 500-fold solution, 50% carbendazim wettable powder 1000-fold 1200-fold solution, once every 7 to 10 days, continuous prevention and treatment for 4 times.