Pest control and processing of Ziyuan

Ziyuan pest control 1, the main diseases are black spot, blight, spot blight, powdery mildew. Disease control of Aster: (1) Disease-resistant varieties should be selected. (2) ventilation, temperature control and prevention of foliar dew. (3) Pharmaceutical prevention and treatment: spray 1-100 Bordeaux solution before onset, once every 7-10 days, spray with 75% chlorothalonil 500-800 times. Control of Aster powdery mildew: select disease-resistant varieties, strengthen ventilation in the field, reduce humidity and temperature, and use 200-fold solution of "Nongkang 120". 2. the main insect pests are perilla powder wild borer, purple striped foot moth, small land tiger, yellow tiger, big black Gill beetle, black velvet Gill beetle and red spider. The wild borer, Chilo suppressalis and Spodoptera litura are mainly harmful to leaves and shoots. The main results are as follows: (1) remove the branches manually. (2) clear the garden to deal with dead branches and leaves, plough the land after harvest and reduce the source of overwintering insects. (3) spraying 800-fold solution of trichlorfon. Small land tiger, yellow tiger, big black Gill beetle, black velvet Gill beetle, red spider control: (1) remove weeds on the edge of the field. (2) trapping and killing adults, trapping and killing adults in the evening with sugar and vinegar solution (1 min Hongtang, 0.5 min wine, 2 min vinegar). (3) the larvae were captured artificially, checked the seedlings every morning, found that the seedlings were broken, and picked up the topsoil nearby to catch the larvae. Chemical control: use Lycoris bulb plus Baibu powder 7-8 jin per mu combined with fertilization. The larvae under the 3rd instar were sprayed with 1000 times of trichlorfon. Red spider: can spray 0.3% Sophora flavescens plant insecticide 1000 times solution to prevent, June-August occurrence period spray sulfur suspension. Fifth, the best time for harvesting asters is before and after harvesting and processing Frosts Descent, such as too late to harvest in autumn and before germination in February in spring. When digging, first cut off the withered stem mouth on the ground, slightly water the moist soil, make the soil slightly evacuated, then carefully dig out the underground root and rhizome, do not break the whisker root, dig out and shake off the soil, and select part of the strong rhizome to be cut off as seed material. The rhizome of Aster planed is cut several times, put in a dry place to be semi-dry, braided and then dried, which is called "braided Aster". Generally, the yield of dry products per mu is about 300kg, and the drying rate is 25%. The environment and tools of the processing site should meet the hygiene requirements, clean the sun yard in advance, stay away from the road, prevent dust pollution, and be equipped with rain-proof and poultry-proof equipment. Aster medicinal materials are irregular block, with stem base and petiole residue at the top, and occasionally unremoved mother root at the bottom, grayish yellow, fibrous, slightly hard, and there are many fine roots under the rhizome, 3-15cm long, 1-3mm in diameter, grayish red or longitudinal on the surface, flexible, gray-white cross section, purple edge, slightly fragrant, sweet taste, slightly bitter.