Chemical weeding techniques in Schisandra chinensis field

In recent years, the production of traditional Chinese medicine in Dandong has developed rapidly, especially the cultivation area of Schisandra chinensis has increased year by year, which has become a new bright spot of economic growth in our region. But the weeds in Schisandra chinensis seedling field and Honda have always been a headache for drug farmers. Traditional manual weeding is laborious and laborious, and the use of herbicides can effectively improve production efficiency, but there are few experiments. We tested the chemical weeding technique in Schisandra chinensis field with large cultivated area and achieved good results.

1. The investigation results of weed species in Schisandra chinensis field showed that the serious damage of weeds in Schisandra chinensis field in Dandong area were paspalum grass, duckweed, satang, amaranth, quinoa, trigonum, Chenopodium, Chenopodium, Euphorbia angustifolia and so on. Among them, the damage of Scutellaria mandshurica and duckweed is particularly serious.

two。 Jing Wei Cao Ke is a highly selective new type of dry field stem and leaf treatment herbicide produced in Japan, which can effectively control 1-year-old Gramineae weeds, such as barnyardgrass, wild oat, Magnolia mandshurica, Euphorbia angustifolia, Setaria angustifolia, Pennisetum angustifolia, etc. Schisandra chinensis was transplanted from seedling bed to Honda from late April to early May. After transplanting slow seedlings, Jinghe Caoke can be applied at any time in the flourishing period of Gramineae weeds, but it is best to apply it at the weed stage of 3-5 leaves. 1.5% of fine grass per mu can be used for 70 ml to 30 kg of water, stir well and spray on the stems and leaves of weeds. When controlling perennial weeds, one dose can be used twice, which can improve the weeding effect, and the interval between the two doses is 20-30 days.

Note when using medicine: ① weeds with young leaf age, luxuriant growth, low dosage when the water condition is good, high dosage under drought condition and high soil moisture are beneficial to the absorption and transmission of Jinghe granule by weeds, and are not suitable for long-term drought without rain and when the air relative humidity is less than 65%. ② is generally applied in the morning and evening, there should be no rain within 2 hours after application, long-term drought, if there is rain in the near future, the field soil moisture should be improved after rain. ③ Jing Gao Ke is a kind of aroxy phenoxypropionate herbicide, which should not be mixed with hormones, sulfonylureas, diphenyl ethers such as 2.4-D, 2-methyl-4-chlorine, trimethoprim, prednisone and so on.

3. Nongda herbicide is a broad-spectrum herbicide with internal absorption and transmission, which can be transmitted not only to the underground part of weeds through stems and leaves, but also between different tillers of the same plant, which is very destructive to the underground tissue of perennial root-probing weeds. Nongda has a wide herbicide spectrum and has a control effect on weeds of more than 40 families, including monocotyledons, dicotyledons, annual and perennial herbs and shrubs. When Schisandra chinensis is 2-3 years old and the weed plant height is not more than 15 cm, the effect is the best. 48% Nongda water agent 150ml / mu is used to spray water directionally, which can control most of the annual weeds. Control difficult weeds such as white grass, dog tooth root, cattail, lip grass, and some Gramineae weeds such as moss, brome and some refractory broad-leaved weeds such as Artemisia annua, Bauhinia, thistle, Rumex and Rosaceae weeds, 400-600 ml per mu. When spraying, it is appropriate to spray to the leaf surface evenly. Nongda can be applied at any growth period after weed emergence, but the weed flourishing period is the best. Before the transformation from vegetative growth to reproductive growth, the application of perennial weeds was the best, the application in sunny day was good, but the effect was poor in cloudy days.

Note when using medicine: ① must be sprayed in windless and rainless weather to prevent the drug from drifting to other crops to cause drug damage; the sprinkler must wear a shield and use low pressure and heavy fog droplets for inter-line directional spray. When applying ②, do not touch the green buds or green parts of Schisandra chinensis to prevent drug damage. If there is drug damage in the bottom leaves, remedial measures should be taken immediately, such as spraying foliar fertilizers such as Green Pioneer, Wotuan and so on.