Leaf spot of Fugui bamboo

Symptom

The initial stage of the disease is brown spots, the edge is yellow; the disease spot gradually expands into a round, central gray, the edge is dark brown, surrounded by yellow; black grains appear on the disease spot under wet conditions.

Prevention and cure method

Prevent the plant from being too dense and keep it ventilated and transparent. When the growth is too dense, prune it in time and remove the diseased leaves in time.

At the initial stage of the disease, the foliar surface was sprayed with 42% gram bacteria powder 3000 times, once every 5-7 days, for 2 times.

Leaf spot of Fugui bamboo

Symptoms of onset

It happens on the leaves. The initial stage of the disease spot is brown spot, the edge is yellow; after expansion, the disease spot is nearly round, gray inside, the edge is dark brown, and the surrounding yellow, and black grains appear on the disease spot under wet conditions.

Cause of disease

It is a fungal disease. The pathogen lives on the diseased body of the plant and can be infected directly from the stomata of the leaves by means of airflow and insect transmission. The disease can occur all the year round in the greenhouse environment and serious in humid conditions.

Prevention and cure method

During the maintenance period, the plant density should be controlled to maintain ventilation and light transmission.

* spraying fungicides such as Bacillus japonicus, ethyl phosphorus, aluminum, manganese and zinc at the initial stage of the disease.

Control methods of Leaf spot of Fugui Bamboo

The pathogen is mainly transmitted by wounds, and the disease is serious under wet conditions. The disease is the most common in Guangdong from May to September, which is due to the high temperature, high humidity, typhoons and showers, which make the disease very easy to spread. The disease is highly contagious and can cause plant leaves and stems to rot.

Symptoms:

The initial stage of the disease spot is brown spot, the edge is yellow; after expansion, the disease spot is nearly round, the center is gray, the edge is dark brown, and the surrounding yellow; black grains appear on the disease spot under wet conditions.

Prevention and control methods:

1) prevent the plant from being too dense and keep it ventilated and transparent.

(2) at the initial stage of the disease, 42% gram clean powder 3000 times liquid, or 88% hydramycin hydrate 1000 times solution, or 25% complex ammonia copper 800 times solution, sprayed once every 5 to 7 days, 2 times for 3 times.