Type of Plant Diseases
For home gardeners, nothing is more frustrating than seeing their work destroyed by pests and diseases.
The disease occurs when environmental conditions are suitable for the expansion of pathogens on susceptible hosts. Some pathogens attack a spread of plants, while others attack only specific plants. additionally , some pathogens can attack all parts of the plant, while others attack only selected tissues.
Many types of organisms cause plant infections, but the highest five sorts of plant pathogens are fungi, water molds, bacteria, viruses, and nematodes. Adverse environmental conditions can also cause non-infectious diseases of plants, called diseases. Adverse conditions include inappropriate soil pH, nutrient deficiency and toxicity, soil compaction, excessive water content, and herbicide destruction. Plants weakened by adverse conditions could also be more susceptible to pathogens.
The following may be a brief introduction of several common plant diseases, symptoms and solutions, I hope to assist some growers. Biocontrol solution for plant diseases
1. Powdery mildew:
Mildew may be a fungal disease, which is straightforward to occur within the environment of warmth , humidity and no ventilation. It often harms the flowers and trees of the leaves, stems and flower stalks and other parts, the surface of a layer of white powder, serious disease when the leaf wilt.
In the sweltering heat of summer, the leaves yellow and rose ? and melon plant disease easily. Prevent and cure mildew to require to extend illumination and ventilated drop temperature dehumidify, can add biofertilizer reasonably additionally, enhance disease resistance ability and reduce soil-borne diseases.
Already diseased plants are often sprayed with some medicaments like carbendazim for prevention and treatment.
2. Grey mold disease:
It’s caused by the infection of bostospora cinerea, which may be a fungal disease. the expansion temperature of the pathogen is 20~30?, and within the coldness and high humidity environment is more susceptible to disease, When the temperature is 20~25? and therefore the humidity lasts for quite 90%, it’s the height period of diseases.
The fruit is infected, the stigma that is still or petal is infected more first, after be spread to the fruit, cause fruit skin is grayish-white, have thick gray mildew layer, show water rot shape, plant disease starts from leaf tip, along leaf vein becomes “V” shape to expand to the within , drab, the side has the striate line of dark and lightweight alternate with.
This disease may be a typical airborne disease, which may be spread by air, water, and farming. within the actual disease control process, it’s difficult to require effective measures to completely stop the source of infection; within the case of pathogen invasion, it’s difficult to completely eliminate the pathogen, like drug spraying, it’s difficult to unravel the air and dew pathogens, And alone fume shed, cannot specialise in the disease leaves, disease fruit and other diseases on the body or internal pathogens. Therefore, we must do early disinfection and prevention before planting.
3. Soft rot:
A bacterial disease that happens in heat and humidity. The bacteria enter the tissues from the injuries within the leaves and roots of the plants, secrete toxins, make the tissues necrotic, absorb nutrients from them, and reproduce and spread to the encompassing areas. The affected plant part becomes a translucent milky yellow slime with an odor.
In addition to improving the environment and therefore the air, it’s important to stop plant disease . Want to avoid the page to spray water additionally, stop disease leaf in time, when large area suffers, can use streptomycin to undertake prevention and cure.
4. Root rot:
It also referred to as black stem disease, black rot, is caused by the fungus, nematodes, bacteria disease , often within the heat , high humidity environment. plant disease often occurs within the roots and spreads upward. The stems of plants rot and switch black. The function of absorbing water and nutrients is gradually weakened. When the disease is serious, the leaves of the entire plant become yellow and shriveled, and therefore the root skin becomes brown and dry, and a part of it’s separated from the pith. Finally, the entire plant dies.
How to prevent, the primary is ventilation cooling, improve the environment; Next want scientific cultivation, reasonable water fertilizer, make the plant healthy, raise oneself disease resistance; additionally to doing an honest job of soil disinfection. within the early stage of the onset of succulent plants, the diseased parts are often excised and re-rooted after drying.
5. Leaf spot disease:
Also referred to as brown spot disease, plant disease disease, may be a fungal disease, within the heat , sultry, not a ventilated environment comfortable to occur. At the start of the disease, the affected leaves appear small circular black spots, which gradually expand into a circular or nearly circular shape. Prevention is especially to enhance the environment, ventilation, transparent, cooling, and timely stop , burned disease leaves, prevention, and cure the infection. Severe cases are often sprayed with methyl topazine or carbendazim and other drugs.
A fungal disease that attacks the leaves and young stems of plants. When the indoor heat is sultry summer comes on more serious. Leaf damage often appear round or elliptic disease spot, the middle is grayish-white brown , the sting dark brown, late disease spot will have black spots, when serious leaf death, young budtender stem disease often cause decay. Summer heat. The prevention method is that the same as three points:
there are three prevention methods below.
First, improve the environment, ventilation cooling; Secondly, reasonable fertilization to reinforce plant resistance; Do an honest job of soil disinfection, timely remove the diseased plants and destroy; Can spray chlorothalonil, carbendazim, and other drugs for control.
7. Viral Disease:
A disease caused by parasite viruses. Plant viruses must sleep in the host cell parasitic, highly specific, an epidemic can only infect a particular quite plant or some plants, but there are a couple of widespread damages, like mosaic virus and cucumber mosaic virus.
The manifestations of viral diseases are often divided into four types: mosaic, yellowing, necrotic and malformed. additionally to the above two, the more common tomato mosaic virus disease, Jujube Witches Broom.
The treatment of viral diseases is additionally difficult, especially the damage to woody plants is devastating, insect pests like aphids and planthoppers are the most disseminators of plant viruses, so to stop the spread of viral diseases must do an honest job in pest control.