Control of root rot of Salvia miltiorrhiza
1. Harm symptoms: root rot of Salvia miltiorrhiza occurs in high temperature and rainy season, harming plant roots. Only a few roots or a part of underground rhizomes develop disease at the initial stage, and gradually expand to the whole root system. After the root is damaged, wet rot occurs, the outer skin is black, and some branches and leaves die in the early stage of the disease on the ground, and the whole plant dies when it is serious. Danshen production areas have different degrees of damage, resulting in certain losses.
II. Control methods
1, the implementation of rotation: due to soil bacteria, Danshen continuous cropping early onset, serious disease, rapid spread. It is best to rotate with grass crops for 3 to 5 years to reduce the pathogen base and reduce the incidence.
2. Healthy seed retention: select disease-resistant varieties; select healthy disease-free seed roots; do not leave seeds in diseased fields to reduce diseases.
3. Strengthen field management: apply fertilizer reasonably, apply more organic fertilizer, increase phosphorus fertilizer and potassium fertilizer; remove accumulated water in time in rainy season, pay attention to loose soil, and improve plant disease resistance.
4. Chemical control: 1 kg/mu of 70% Dikosong WP or 50% Carbendazim WP mixed with 3 kg of fine soil, sprinkled into the hole when planting, has certain control effect; Disinfect the cuttings and heads of reeds, soak the cuttings and heads of reeds with 800 times solution of 50% Tuijunte WP or 1000 times solution of 70% Thiophanate-methyl WP for 3 - 5 minutes, dry and seed; During the growth period, the disease can be controlled by irrigating the roots of the diseased plants with fungicides at the early stage of the disease. The commonly used pesticides include 50% trimethoprim WP or 50% dicosone WP 500~800 times solution, or 96% copper sulfate 1000 times solution, or 3% agricultural antibiotic 120 solution 100~150 times solution, once every 10~15 days for 3~4 consecutive times.
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How to cultivate Salvia miltiorrhiza with High yield
1. According to the living habits of Salvia miltiorrhiza, the land with sufficient light, good drainage, convenient watering and low groundwater level should be selected. The soil requires the sandy loam with deep soil layer, loose texture and pH value of 6-8. Heavy clay, low-lying stagnant water, covered by things
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Planting techniques of pollution-free Salvia miltiorrhiza
1. Scope this standard is applicable to pollution-free production of Salvia miltiorrhiza in open field in Hebei Province. This standard stipulates the environmental and technical conditions, fertilizer use principles and requirements, production management and other measures for pollution-free Salvia miltiorrhiza per hm2 per unit yield 4500kg~5200kg. two。 Pollution-free production management measures
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