The pests and diseases caused by the cultivation of edible fungi can not be saved. Therefore, the prevention of the occurrence of diseases and insect pests in advance has become a major point.
Cut off the spread of pests and diseases
There are three sources of diseases and pests in the cultivation of edible fungi: one is that the strains carry insects, and the other is the source of the disease; the other is the culture material and the covering soil with insects and the source of the disease; and the third is the natural propagation inside and outside the mushroom house (shed). The cutting off of these three channels of communication is the most important issue for integrated pest management.
Environmental control to reduce pests and diseases
Reduce the material temperature: If the temperature of the mushroom material is controlled below 21°C, it can effectively control the P. fulvum; the temperature of the Mushroom is controlled below 20°C; the Pleurotus ostreatus bag can prevent bacteria bag contamination below 20°C.
Strengthen ventilation and ventilation: Ventilation and ventilation are the best ways to disinfect air. Do not cause boring wet mushrooming environment. There is no harm to ventilation without ventilation. 3. Light adjustment. Different varieties have different illumination requirements. For example, the mushrooms should be darker, while the white mushrooms need to be stronger.
Agronomic control: Different soils have different microflora and different ecological environments have different biomes. Practice shows that the cultivation of soil sheds is generally good in the first year and worse in the second year. The reason is that the ecological environment of the shed is getting worse, which means that there are more bacteria, more pests, and the air quality is not good. To this end, we must improve the ecological conditions, optimize mushrooming environment, reduce and reduce the occurrence of pests and diseases.
Chemical control: Chemical prevention is generally used in preventive measures. It is forbidden to use chemical control during fruiting, because the tissue structure of the fruiting body is prone to produce toxic residues, affecting food and export. Therefore, it is forbidden to use medicinal control during fruiting. Even if it is absolutely necessary, it can only be sprayed before fruiting, and it is better to use phytochemicals, such as phytoalexin.
For the cultivation characteristics of edible fungi, comprehensive prevention and control of edible fungi is a good method.
Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.
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