How to treat the disease of Bletilla striata?
Bletilla striata is a traditional Chinese medicine in Orchidaceae, mainly distributed in East China, Central South, Southwest China, Gansu, Shaanxi and other places. Guizhou has the largest output and the best quality among them. Due to the large market demand, bletilla striata has also been artificially planted, so how to prevent and control diseases of artificially planted bletilla striata?
The main diseases of bletilla
The main diseases of bletilla striata are root rot, leaf spot and soft rot, which occur in rainy season. When the disease occurs, the leaves and roots are damaged and the plants die. The pathogen overwinters in dry branches or soil as mycelium or conidia. The infection began in the middle and late May of the following year, and the peak period was from July to September. Conidiospores are spread, expanded and reinfected by wind, rain or insects.
Common pests are grubs, insects, mole crickets and ground tigers. These insects generally feed on the young roots and stems of crops, often biting or biting the roots, resulting in dead seedlings, lack of seedlings or causing tuber rot.
II. Treatment
Among diseases, root rot mainly depends on prevention. Organic fertilizer and Aonongle are used to adjust soil before planting. In the whole growth process, it can be applied for 2-3 times to activate soil, fix nitrogen and fix carbon, and control various diseases of crops through antagonism, occupation and opening secondary metabolism of crops. For leaf spot and soft rot, spray Qingkuli/Sujing + Garlic Oil + Wofengsu for 2 times continuously, with an interval of 3 days each time, and spray Qingkuli + Diwang for the third time. At the same time, attention should be paid to timely drainage to reduce field humidity.
When insect pests occur, in the areas where white grubs and grub insects occur seriously, fertilizer mixing and closed seeds should be given priority to; in the areas where mole crickets occur seriously, poison bait should be given priority to; in the areas where cutworms occur seriously, deep turning and killing eggs, weeding and pesticide control should be combined. At the same time, 90% trichlorfon 1000 times solution or 75% phoxim 1000-1500 times solution can be used for root irrigation.
These are some of the relevant measures for the prevention and control of bletilla striata pests. I hope that friends who plant bletilla striata can have a good harvest.
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