Anthracnose of Fugui bamboo

Symptom

In the early stage of the disease, there are grayish-brown disease spots on the leaf tip or leaf edge, which are irregular or semicircular, the center is gray-white, the edge is dark brown, and there is a yellow halo outside; the wheel pattern on the disease spot is obvious or not obvious, and there are small black spots on it.

Prevention and cure method

Diseased leaves were removed in time in winter and spring, and quicklime was sprinkled to disinfect the soil.

Strengthen ventilation, properly control water, reduce the humidity of basin soil and apply organic fertilizer properly.

It is necessary to remove the remains and concentrate on burning, and sprinkle quicklime to sterilize and disinfect the soil.

Spray medicine in time to control the disease, spray chlorothalonil for 3 or 4 times with an interval of 10 days.

How to prevent and cure anthracnose of rich bamboo? Control methods of anthracnose of rich bamboo

Rich bamboo anthracnose is harmful to the growth of rich bamboo, and seriously endangers the survival of rich bamboo, but don't worry. Next, the editor will introduce you in detail the prevention and control methods of rich bamboo anthracnose to help you better plant rich bamboo.

Prevention and control of anthracnose of rich bamboo:

1. Maintenance and management

When the rich bamboo appears the symptom of anthracnose, the diseased leaves and dead leaves must be cut off in time, and they must be taken out of the field and burned, so that the occurrence of bacteria can be effectively reduced, the pathogen can be eliminated, and then fungicides are sprayed on the whole garden. effectively eliminate the source of bacteria in Fugui bamboo park.

two。 Timely drainage should be carried out after rain

Attention must be paid to the cultivation of rich bamboo in the open field, drainage should be carried out in time after rainy days, the humidity of the park should be reduced, nitrogen fertilizer must not be applied in fertilization, foliar fertilizer should be sprayed in time to promote the better growth of rich bamboo, and the disease resistance of rich bamboo can be improved.

3. Pest control

The pests of rich bamboo are mainly spiders, longicorn beetles, leaf mites, shell insects and other diseases, so we must control these pests in time, to a certain extent, can control the occurrence of anthracnose.

4. Indoor cultivation

Now there are many people raising rich bamboo at home, so we must pay attention to ventilation and light, cooling and dehumidification, which can effectively avoid the breeding of germs.

The above is the prevention and control methods of rich bamboo anthracnose summarized by Xiaobian for you. I hope everyone can plant rich and rich well.

Occurrence and Control of anthracnose in Fugui Bamboo

Fugui bamboo (scientific name: Dracaena sanderiana Sander), belonging to tequila family and dragon blood tree, is a small perennial evergreen tree foliage plant. The plant is slender, erect and branched distally. The rhizome is transverse and nodular; the stem is stout, erect and exquisite. Leaves alternate or subopposite, leaves long lanceolate, with obvious main veins, leaves dark green. Umbels have 3-10 flowers in leaf axils or opposite flowers to upper leaves, Corolla campanulate, purple. Berries subglobose, black.

Rich bamboo is native to the Gali Islands and tropical Africa and Asia, and has been introduced into China in large quantities since the late 1980s. Generally used for family bottle or pot care, especially from Taiwan spread from the "tower" shape, also known as "Kaiyunzhu", high ornamental value. In China, there is a message that "the flowers are rich and the bamboo is safe". Because the stems and leaves of the rich bamboo are delicate, graceful and full of bamboo rhyme, they are very popular with people. Occurrence and Control of anthracnose in Fugui Bamboo

Anthracnose of rich bamboo is a common disease, which occurs more commonly, and it is a serious disease that harms rich bamboo in the south. Due to the high temperature and long drought last winter and spring, early-planted rich bamboos have grown luxuriantly in Zhanjiang, Guangzhou, Taishan and other areas of Guangdong. According to many flower growers, many rich bamboo leaf tips to the leaves become dry, and continue to spread to the upper leaves; due to drought and high temperature for a long time, coinciding with rainfall led to disease outbreaks. It was diagnosed as the epidemic of anthracnose in Fugui bamboo, which occurred ahead of schedule in the middle of March. 2. the symptomatic disease began to occur on the leaf tip or leaf edge and leaves, and showed water-stained dark green irregular spots at the initial stage, and gradually spread to the upper leaves; in the middle stage, it was semicircular to amorphous, the edge was dark brown, and the boundary was obvious; in the later stage, the outer edge of the disease spot was yellow halo, and the middle of the spot was grayish brown or grayish white to yellowish brown. The wheel pattern is obvious or not obvious, and there are small black spots on the disease spot, and the leaves begin to turn yellow and die gradually. Once the disease spot spreads to the leaves, tender leaf buds, the main stem and the base of the leaf stem, when the disease is serious, the stems and leaves will wilt and die quickly. In the rainy and foggy weather, the diseased leaves spread and the plant grew poorly, which seriously affected the effect of leaf viewing. Third, the pathogen and the regularity of the disease are the semi-known subphylum echinococcosis. The pathogen survived the winter on diseased leaves and remnants with mycelium and conidial disk. When the temperature rises in the following spring, the conidium produces conidia, which spreads by wind, rain, fog and dew, and germs invade from stomata and wounds. The infection can be repeated many times during the growing period. When the temperature rises, the humid weather environment is favorable for the disease. The disease can occur from the middle of March to October every year, and the optimum temperature for germination is 22 ℃. In the south, the disease is the most serious from May to June, with cloudy and rainy summer, high soil moisture and rapid development of the disease. Secondly, the disease is also more serious in summer and autumn. In general, the primary disease occurs first in the leaves. Potted bamboos in southern families can also occur all the year round. Generally, spiders in the open field can damage the heart of the leaves or bite the tip of the leaves to spread and invade, and can also survive and spread in the soil. The disease is serious under the conditions of over-sticky soil, impermeable air, poor drainage, lack of ventilation and light, over-dense plants and high temperature and humidity, extensive management or weak growth of drought and fertilizer deficiency. Fourth, prevention and control methods 1, strengthen the maintenance and management of rich bamboo, should not plant too dense; pay attention to avoid frost and frost damage; moist irrigation, reasonable fertilization, increase the application of phosphorus and potassium fertilizer, in order to promote growth and improve disease resistance. 2. In winter and spring, diseased leaves should be cut off and withered leaves should be cleaned and burned centrally to reduce the incidence of the disease, and quicklime should be sprinkled once to sterilize and disinfect the soil; or 50% compound carbendazim 500 times liquid should be sprayed once to prevent the disease, and the preventive effect is better. 3. Improve the permeability of field or garden, pay attention to open ditch and drain waterlogging after rain, reduce field humidity, and should not apply nitrogen fertilizer. Set up a sunshade net during the growing period to reduce high temperature and strong light exposure. Kill spiders, longicorn beetles, leaf mites and shell insects in time to reduce transmission media. 4. When diseased plants are found, they should be sprayed in time to control the disease. At the initial stage of the disease, 75% chlorothalonil + 70% methyl topiramate wettable powder (1:1) 600ml 800x, or 50% compound thiophanate 800x or 50% plus Renong wettable powder 600ml 800x, or 12.5% EC banana banana stripping 1000ml 1500 times, 25% carbendazim wettable powder 500x, or 50% anthrax Fumei wettable powder 500x can be sprayed alternately. 50% Baogong wet powder 1000 times liquid, or 75% chlorothalonil + 70% Gaule (1:1) 1000mur1200 times liquid, the control effect is good. The above agents are used alternately, once every 7 days, and sprayed continuously for 4 times. Generally, it is sprayed quickly before or after heavy rain to control the spread and infection of spores and conidia, and the control effect is better.