Oyster mushroom rust spot often appears, how to prevent and control oyster mushroom rust spot?

If rust spots occur, ventilation should be strengthened to reduce relative humidity. Drug control can be sprayed with 5% lime clarifier, 1:600 times of bleaching powder, 500-800 times of aqueous solution of amber antiseptic, oxytetracycline, streptomycin, gentamicin or chloramphenicol solution containing 120 units per milliliter, or a mixture of 3 parts of bleaching powder and l parts of soda ash.

Medications** can be used. Some pesticides can prevent rust spots in oyster mushrooms.

Spraying. Because spraying can effectively prevent rust spot disease, my oyster mushrooms are sprayed every year, and I have never had this disease, so I should spray some medicine.

Pay attention to the temperature of planting, but also pay attention to the spread of pathogens, and at the same time spray pesticides in advance, strangle the virus in the cradle in advance, and pay attention to management techniques.

Spray pesticides. Because after the pesticide is applied to the oyster mushroom, the melasma disappears, so I can apply pesticides.

The prevention and control of oyster mushroom macular disease can be sprayed with water (each piece is mixed with water catties) from Fujian Gutian Fungal Research Institute, and the effect is good! Once the disease occurs, it should be controlled as soon as possible, and ventilation and humidity reduction should be considered first, and then drug prevention and treatment should be considered. Sick mushrooms should be buried deep away from the cultivation site!

When cowpeas have two leaves and one core, they can be transplanted into the field. After cowpea transplantation in the field or after the emergence of seedlings, it is necessary to cultivate and weed, clear the ditch and drain the water to prevent the soil from being wet, after the seedlings emerge, use 25 kg of human manure and urine to mix 25 kg of water, add 250 grams of urea to raise seedling fertilizer again, and then set the seedlings and eliminate the weak seedlings.

It is easy to develop embroidery spot, especially in the period when cowpea grows vigorously and forms a clamp, if a large rust spot occurs on the leaves of cowpea, it will cause cowpea to only bloom without clamping, or too few clips, and in serious cases, it will reduce a large amount of yield, or cause cowpea growth period to be shortened, shrink and die. Susceptibility. Rust mainly affects the leaves of cowpeas.

From the initial yellow dots, it gradually spreads throughout the leaf, and eventually causes the leaf to lose the ability to photosynthesize, wither and fall. Rust will cause the leaves to fall early, affecting the normal growth of beans, and the small size of the plant will have a greater impact on the yield.

Warm and heat-resistant, but not frost-resistant, it has a lot of pests and diseases during the growth and development period, there are coal mold, also called leaf spot, virus disease, anthracnose, root rot, blight, horn spot, gray mold, rust, etc., now mainly introduce cowpea rust. After the sores are broken, they emit a reddish-brown powder, which produces greenish spots on the front of the leaf surface with sores, and when the disease is severe, the leaves will dry up and fall off quickly, which has a great impact on the yield, and it will also occur on the pods, the symptoms are similar to those on the leaves, but the shape is larger.

Generally, it can happen in the open field and in the greenhouse in summer. Once infected with this disease, if the correct control measures are not taken, cowpea leaves will fall, affecting yield and commerciality. In the first year we planted cowpea, due to the lack of pest control of cowpea, rust occurred in a large area, and the entire leaf fell off in less than a week, and thousands of pieces were lost in a shed.

The key to high yield of beans is to repel underground pests, isolate virus infection, improve germination rate, choose a pastoral with high terrain and good hydrophobicity, maintain ventilation and light transmission, prevent excessive humidity, and do a good job in disease prevention and control.

Rust-colored or dark brown spots that appear on the cap and stipe of oyster mushrooms are called oyster mushroom rust spots. This disease is a sexual disease that is prone to occur during the fruiting body growth stage of oyster mushroom. The pathogen that causes the disease is Pseudomonas bacillus, which is widely distributed in nature.

Oyster mushroom rust spot is a kind of disease that is easy to occur in the growth stage, and the occurrence condition of oyster mushroom rust spot is that the ambient temperature is relatively high and the environment is relatively humid.

Oyster mushroom diseases are common in the following two categories:

1. In the cultivation process, the environmental conditions and management methods are inappropriate; A phenomenon that causes abnormal physiological activity. For example:

1) Oyster mushroom tall foot disease: after the formation of the primordium of oyster mushroom, the morphological differentiation of the fruiting body is abnormal, the cap is deformed, the cap is not formed or the cap is very small, the mushroom stalk is very small and long, the cap grows upward, and the value of the fruiting body is very low, or even unsellable.

Prevention and control: After a large number of primordium is formed and begins to differentiate, the ventilation of the mushroom room should be increased to ensure that the mushroom room has sufficient oxygen and there is no excessive carbon dioxide deposition.

2) Bigfoot mushroom of Oyster mushroom: the fruiting body cap is very small, and the stipe is thick and long. This is mainly caused by lack of oxygen and poor ventilation.

Prevention and control: Strengthen ventilation and pay attention to light to prevent it.

3) Cauliflower disease: after the oyster mushroom grows out of the primordium, it has been in the state of mulberry stage, the mushroom stalk is more bifurcated, and the early oyster mushroom primordium is oval, convex and enlarged, and can not continue to differentiate into a fruiting body form, and gradually grows more branches, forming a small cap that is nearly spherical. The primordium is still growing, spherical or hemispherical, and looks like a cauliflower.

Prevention and control: Oyster mushroom cauliflower disease, like other physiological diseases of oyster mushrooms, once it appears, there is no complete rescue measures, rational use of pesticides, keep the mushroom room ventilated, fresh air, is the main way to prevent oyster mushroom cauliflower disease.

4) Oyster mushroom pesticide damage: After the fruiting body is sprayed (dichlorvos), the cap stops growing, and a black edge forms on the edge and rolls up.

Control: It is forbidden to use some harmful pesticides.

5) Rust spots: Rusty brown spots are produced in the morning on the cap and stipe of oyster mushrooms. The main cause of this is poor ventilation and excessive humidity.

Prevention: Strengthen ventilation and reduce humidity.

2. Dry bubble disease (brown spot disease), which mainly endangers its normal growth. Symptoms include white villous hyphae on the surface of the fruiting body, brown spots, and atrophied and cracked caps.

Prevention: reduce the temperature and strengthen ventilation. Spray 2% formaldehyde solution or 1:500 times carbendazim in the ward. Or use the spray control of pesticides such as mushroom buster, No. 2 wart gram relucitin, mildew spot, and friend finch to keep clear. Several drugs are used alternately.

It usually occurs from March to May; It is severe under the conditions of high temperature, high humidity and poor ventilation, and often develops rapidly after fog or sandstorms.

First of all, it is known for a long time in a state of high temperature or high humidity, and the ventilation situation is not particularly good, generally when the wind is relatively strong and the fog is relatively large, the speed of reproduction is also relatively fast, and the grinding is served.

If the temperature is too high, the ventilation is not good, the humidity is too high, and it is infected with other germs, and there is no crop rotation, it is easy to develop such diseases.

This is mainly due to poor ventilation of the greenhouse. It is caused by high humidity in the air, or by water accumulation in the bacterial cap. It can be prevented by improving the growth environment.