Agricultural measures for controlling soil-borne diseases and insect pests in solar greenhouse
The main soil-borne diseases in greenhouse are fusarium wilt, verticillium wilt, root rot, bacterial wilt, stem rot, etc. The main soil-borne pests are root-knot nematodes, root mite, etc.In LingYuan region, main causes soil borne diseases and insect pests in facilities can be classified as 4 points: one is cultivated varieties of a single, continuous cropping pattern is so common LingYuan is producing greenhouse cucumber, more than 90% of farmers planting cucumbers, only more than 10 years or even 20 years cause damping off, blight, stem blight, root knot nematode pests such as more and more serious;Second, the use of chemical fertilizers and pesticides increased year by year, resulting in soil acidification and salinization, resulting in the imbalance of soil microbial community, the reduction of beneficial bacteria, the increase of harmful bacteria, especially nitrogen fertilizer can stimulate the growth of Fusarium, rota and nucleomycetes, so that the growth of plant roots is blocked, nutrient absorption capacity decreased, resulting in production reduction;Three is the greenhouse leaves piled up everywhere, so that some pathogens with airflow, rain spread;Four is the employment of rotary tiller machine operation, the last rotary tillage is not finished mechanical cleaning and disinfection into the next operation, easy to lead to the spread of diseases and insects.1. Planting fallow crops After the production of shed vegetables, planting deep-rooted cereal crops in the next stubble can improve soil, slow down salinization, improve soil microbial activity, and inhibit nematode occurrence.2. Different crops have different requirements for soil nutrients in rotation and back cropping. During rotation and back cropping, vegetables with developed roots and large fertilizer requirements can absorb more salt, alleviate the imbalance of nutrients, and thus alleviate the toxic effect of soil single salt caused by continuous cropping.3. Increasing application of farm fertilizer Increasing application of farm fertilizer can increase soil organic matter content, improve soil structure, promote soil beneficial microbial activities, enhance crop resistance, and inhibit the occurrence of vegetable diseases and insect pests.