How to treat bamboo gray mold? How to deal with bamboo mildew?

Although ** is very empty, I can't see it very clearly, but it shouldn't be a disease, I used to have such questions, and then I specifically asked the expert group of the Guangdong cash cow program, but there are shield scale pests. It is recommended that you use small bamboo slices on the stem to press if there is sap overflowing. It is certain that the scale insects are infested.

It can be sprayed alternately once every 10 days with 3% acetamiprid EC 2000 times, or 48% chlorpyrifos EC 800 times, or 25% thiazinone EC 1500 times with alternating spraying every 10 days, and spraying 2 3 times continuously.

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The management of bamboo gray mold requires comprehensive measures, including but not limited to the following:

1.Strengthen management: In the process of bamboo growth, it is necessary to pay attention to the management of bamboo, clean up fallen leaves, diseased leaves and dead branches in time, and keep the environment around bamboo clean and hygienic.

2.Adjust the environment: The environmental temperature, humidity and other conditions of bamboo growth are the key factors for the occurrence of gray mold, so it is necessary to properly adjust the bamboo growth environment to maintain a suitable temperature and humidity.

3.Use of chemical agents: When bamboo gray mold occurs, an appropriate amount of chemical agents can be used for prevention and control, such as spraying with fungicides such as methyl tobuzin, so as to achieve the purpose of killing germs.

4.Physical control: For example, ultraviolet lamps are used to irradiate or the infected parts are cut off in time to prevent the spread of the disease.

Chloromyces (also known as methalene, methama, apro, redomir) or primehain (also known as iprodione, imidazole).

1. Moldy bamboo products can be soaked in light salt water for 3 hours, and then steamed with water for 30 minutes to prevent bamboo mildew, insect moth and cracking.

2. Soak the moldy bamboo products in 5% sodium peroxide aqueous solution for 10 minutes to remove mildew from the bamboo, and then soak them in 5% glacial acetic acid aqueous solution for 15 minutes, take them out and rinse them with clean water and dry them.

3. Do not clean bamboo often, it will affect the aesthetics, if it must be cleaned, you can apply walnut oil after cleaning to prevent insects.

4. Put the products that have been cleaned of mold and mold to dry in the sun, and the products must be dried so that there can be no moisture left, otherwise it will become moldy.

1. Strengthen cultivation management.

Avoid watering on rainy days, control watering and fertilization after the onset of the disease, find the gray mold disease, concentrate on treatment, and pay attention to the hygiene of agricultural operations.

2. Strengthen seedbed management.

Do a good job in the ventilation and dehumidification of the greenhouse, so that the relative humidity of the air does not exceed 65%, which is an effective measure to prevent and reduce gray mold.

3. Strengthen water and fertilizer management.

Do not apply nitrogen fertilizer, increase phosphorus and potassium fertilizer, and cultivate strong seedlings to improve the disease resistance of the plant itself. Appropriate amount of irrigation, rainy days or afternoons should not be watered to prevent frost damage.

4. Chemical control.

Before transplanting, spray the seedlings with 50% Suclin (Pythium) wettable powder or 50% promethexin suspension 1500 times. At the initial stage of the disease, promethine or promethexin is used. 3% Nail Frost spray.

In the later stage of the disease, 800 times of the liquid of 40% Shijiale (pyrimelamamine) was used to suspend the infiltrating land agent.

One of the common diseases on bamboo, it often occurs in the production season, especially during the growth of flowers in the winter and spring sheds, pathogenic bacteria can infect any part of the plant on the ground, reducing the ornamental value. Botrytis infestations a variety of herbaceous and woody flowers, such as more than 50 species such as begonia, New Guinea impatiens, cyclamen and so on.

1. Symptoms. Botrytis cineris is harmful to seedling leaves. The leaves and petioles of the seedlings are grayish-white, water-stained, and the tissues are softened to rot, and there are gray molds on the surface when the humidity is high.

Most of the young stems are in the middle of the leaf rock, the base of the stalk is initially irregular water dipping, soon become soft and rot, shrink or fold, and the later diseased part is covered with dusty mold layer, that is, the conidia of pathogenic bacteria, and finally the diseased seedlings rot and die.

2. Etiology.

1.Pathogenic bacteria.

Botrytiscinereapers）。

2.Morphology. The hyphae are septated, 2 in diameter, and the conidia peduncle grows from nearly 90 angles on the hyphae, the apical branches, the end of the branch expands into a head, and ovoid conidia are clustered on it; Sclerotia lumpy black.

Pattern of onset. The pathogenic bacteria overwinter and summer on the soil or diseased residues with sclerotia, and the suitable temperature for growth is 20 30. A large number of conidia are formed under humid conditions, and the spores invade from wounds and senescent organs through air currents, irrigation water and agricultural operations.

The pathogenic bacteria are more resistant to low temperature, 7 20 produce a large number of spores, the temperature in the seedling shed is 15 23, low light, the relative humidity is above 90% or there is a water film on the surface of the seedlings. In case of continuous rain, excessive density, seedlings growing, and seedlings are injured when transplanting, the roots and leaves will be injured, which will aggravate the condition. The disease is severe during the greenhouse maintenance period.

When gray mold occurs, it will have water-stained yellow spots on the leaves at first, and continue to expand into irregular black-brown spots, and when it is more severe, it will also produce gray mold.

The occurrence of gray mold is mostly caused by fungi, this fungus is called Botrytis cinerea, and the conidia of the fungus stretch out from the sclerotia and gradually grow, infecting the leaves of Bamboo Chinensis, causing it to produce lesions and gray mold.

Botrytis can occur because the fungal spores that produce Botrytis are spread with the help of air and moisture, including wind, watering, rain and other ways, basically, it is easy to occur when the humidity is high. Because under high humidity conditions, fungal spores are more likely to germinate, producing a large number of spores that infect them. Botrytis gray mold occurs mostly in the spring and autumn environments when the conditions are suitable for the disease, as well as in the season of high humidity.

To prevent gray mold from hanging bamboo, we should pay attention to the following points, in winter and spring, the temperature is low, in order to prevent the onset of disease, we should control watering and reduce the surrounding humidity; If it is found that the hanging bamboo plum is infected with gray mold, the infected leaves can be directly cut off and disposed of; When the sun is often maintained, it is necessary to pay attention to ventilation, which can reduce the incidence of disease.

If the gray mold is more severe, it can be sprayed with pesticides**, such as 80 times the liquid of 50% mold mold wettable powder or 800 times the liquid of 28% gray mold wettable powder.