Root rot of carnation
Identification points: Carnation root rot mainly harms the root system. The growth of the plant was weak after infection, there were few whisker roots on the diseased plant, and the leaves wilted. In severe cases, the roots all turn brown, rot, the root bark is easy to peel off, and the plants wither.
Occurrence characteristics: the pathogen belongs to Pythium. The pathogen lives on plant residues in soil and is an important soil-borne fungus, which can harm a variety of plants and cause Pythium root rot. The disease is serious when the soil or matrix is slightly alkaline and the humidity is high. It is easy to occur under the conditions of too dense, too much watering, poor ventilation and so on.
Control methods: (1) pay attention to the improvement of soil or pot substrate, modulated into partial acidity; if the water used for watering flowers is alkaline, ferrous sulfate can be used to modulate the partial acidity, and pay attention to control soil moisture. (2) clean up the diseased plants in time and destroy them to reduce the source of the disease. (3) when the disease began in the field, the root was irrigated with 70% pentachloronitrobenzene powder 800-1000 times for several times, each time at an interval of 7 days.
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High-yielding cultivation of Dianthus chinensis
Bamboo shoot is a kind of natural green food with excellent quality, fragrance and crispness, rich in many amino acids needed by human body; bamboo shoot is a kind of excellent bamboo shoot and bamboo dual-purpose scattered bamboo seed with thick wall and rich elasticity, which is a good material for building frame, making paper, making furniture and processing other articles with high comprehensive utilization benefit. However, the existing bamboo stands are in a state of wildness and tube loss for a long time, only sterile is taken, only harvest is ignored, the bamboo stand structure is unreasonable, the yield is not high, and the economic benefit is low. For this reason, the paper briefly introduces its high-yield cultivation techniques for reference. 1
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Leaf spot of Dianthus chinensis
Identification points: Phyllostachys pubescens leaf spot mainly harms leaves. At first, the disease spot of the leaf was yellow spot, and gradually became black-brown round to oval spot. In the later stage, the disease spot was grayish brown, the edge was dark brown, and when the disease spot was serious, the disease spot connected with each other, resulting in withered yellow and early fall of the leaf. Under moist conditions, there are many small black particles under the disease spot, that is, conidia and conidiophores of pathogens. Occurrence characteristics: fungal diseases. It can occur all the year round in the greenhouse. Rain Water is easy to get sick under the conditions of many, foggy and heavy dew. Poor ventilation and light transmission, extensive management, weak plant growth, all can
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