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Introduction
Plant disease is mainly caused by the causal agent as well as viruses and bacteria also affected the plant. Viruses and bacteria also caused different types of plant diseases. Causal agents can disrupt plant growth and their function and cause different types of diseases. Different types of plant diseases occurred and these are smut, clubroot, black spot, downy mildew. This study also discussed the black spot disease and its controlling methods. Based on this study, it is also understood that plant disease is caused in different ways. According to plant disease, it is also understood that the causal agent also affects plant growth and causes several types of disease.
Plants disease
Plant disease is caused by the different factors that are viruses, bacteria, casual agents, as well as environmental factors also. Casual agents can disrupt the plant growth system as well as the plant transportation system. Some toxic chemicals such as fertilizers, herbicides regulate the growth of the insecticides or anti fungicides that also disrupt the plant function and cause disease. Plants are infected by a few species of diverse organisms. TMV virus is mainly visible in soil and it is affected in vegetables, tomatoes, and weeds. On the other hand, the barley yellow dwarf virus affects oats, wheat, weeds, and grasses. It is most important for the diseases caused by the small grains.
Explain the types of plant disease
Different types of plant diseases have occurred that are downy mildew, smut, black knot, scoch, and others. Downy mildew mainly occurs in the cell humid regions of the plant and it is caused by the fungus-like organism. It is mainly caused by the Oomycete genus. This disease affects the upper leaf surface and fruits also. Black knot is a serious fungus plant disease that is mainly caused by the Prunus species. This disease occurred mainly in the hard, rough and, black knots in the plant. On the other hand, Scotch disease mainly occurred in the burned tissues that were burned by the unfavourable condition. Bacteria and fungi affected these tissues and caused this disease. Different types of plant disease are increased for fungi, bacteria, and viruses. TMV virus attracts the tomato and other vegetables and weeds. On the other hand, some fungi also can cause plant disease. Fungi also caused the black spot disease in the plant. Another important plant disease is cancer which is caused by fungal and bacterial. It mainly affected the stems, limbs, and leaves. It can be controlled by avoiding overcrowding and removing the diseased part from the plant. It is controlled by removing the infected limbs from the plant. Black spot is an important and common plant disease that occurred in the rose plant can affect the stem part and rose.
Black spot disease and controlling methods
Black spot disease mainly occurred in the roses worldwide. This disease causes black spots in the upper leaves and sports large and changes the colour of the leaves. The stem part is also dark in this disease and this disease is caused by the fungal species that is Diplocarpon rosae. Black spot is a very serious disease in rose plants and this disease occurred in cloud weather in a humid region. In these diseases, the fungus can attract on the rose and then absorb water and infect the healthy stem cells of the rose plant and care for the black spot and gall in the plant. The controlling methods of black spot mainly use the fungicide that is sprayed on stem leaves. On the other hand, spray the other agents that kill the fungi and protect them from these diseases.
Conclusion
According to the plant disease, it is concluded that plant diseases are caused by different ways such as by the causal agent, virus, fungi as well as bacteria. Based on this plant disease it also concluded that environmental factors also affect plant development and cause bacterial growth. It also concludes that plant disease controlling methods are also involved in the eradication, avoidance as well as protection methods. Based on this study, it is also understood that plant disease is caused in different ways. According to this study, it also concluded that the symptoms of the virus causing plant diseases are involved into four groups are, yellow-green and yellow mottling, malformations, necrosis, and black spot. It also concluded that plant disease is caused in different ways. It can be prevented in different ways.
