Effect of Corydalis yanhusuo and garlic interplanting

Garlic is a perennial herb of Liliaceae, which is a familiar vegetable and medicinal material. Garlic is a spicy and odorous volatile oil which has a strong bactericidal effect on a variety of plant pathogenic fungi and bacteria. The pesticide "antimicrobial agent 402" synthesized by simulated allicin has a protective effect on plants, and has a certain therapeutic effect and absorptivity. It has a strong inhibitory effect on spore germination and mycelium growth of many plant pathogens, and can effectively control downy mildew, as well as many diseases such as black spot, anthracnose, red rot, Fusarium wilt, Verticillium wilt, bacterial blight, leaf spot and so on. Among the varieties of garlic, the antibacterial activity of purple-skinned garlic was higher than that of white-skinned garlic.

In Jiangsu and Zhejiang, the sowing time of garlic is basically the same as or slightly earlier than that of Rhizoma Corydalis. In mid-April, garlic plants are already relatively tall, and the shaded area of leaves is also relatively large. At this time, when Rhizoma Corydalis most needs sunny and hot weather above 20 degrees Celsius, large plants such as garlic can effectively block part of the hot sun and reduce the degree of burns on Rhizoma Corydalis leaves. In order to delay the withered seedling stage, prolong the time of effective nutrient accumulation and expansion of Corydalis tuber, and achieve the purpose of high yield.

Due to the convenient cultivation and management of garlic, the growth cycle is roughly consistent with that of Rhizoma Corydalis, which can significantly reduce the disease loss and increase the yield of single plant of Rhizoma Corydalis; at the same time, garlic is an indispensable agricultural product for the majority of urban and rural residents. it has high economic value (including garlic, garlic moss and garlic). Therefore, interplanting Rhizoma Corydalis and garlic is an economical and scientific way. As for whether other winter vegetables can be intercropped with Corydalis, it should be analyzed according to the specific situation. For example, the intercropping of cruciferous plants such as radish and green vegetables with Rhizoma Corydalis has both advantages and disadvantages. On the positive side, after sowing in November, Rhizoma Corydalis will not emerge until February of the following year, when cruciferous plants such as radish and green vegetables can make effective use of space for photosynthesis. However, there are many aspects that are not conducive to the growth of Rhizoma Corydalis: first, these crops are more fertilizer-tolerant, consume more soil nutrients, and compete for fertilizer with Rhizoma Corydalis; second, they have large leaf area and shade, which is easy to block the light and make the growth of Corydalis; more importantly, Cruciferae is also the host of Rhizoctonia sclerotiorum, intercropping with each other may lead to serious disease. Therefore, it is not suitable for intercropping.