Appropriate Angelica Cultivation Of Chemical Herbicides

Angelica is umbelliferae Angelica L. Perennial herb medicinal plant.Modern pharmacology and the clinical research also indicated that Angelicahave very good curative effect of many kinds of diseases, especially incardiovascular system illness, anti-tumor, improve lung function, enhancesthe immunity. The Chinese takes Angelica for a very high tradition Chinesenative medicine, but it is also facing many questions, such as weederadication in Angelica cultivation, pesticide residue and so on.This article has first conducted the chemical herbicide screeningresearch of suitable to Angelica to solve the difficulty in weed eradicationin Angelica, cultivation process, provide certain scientific basis.The results are as follows: the suitable herbicide to Angelica isNapropamide+Prometryme(Availability content: Napropamide 50%, Prometryme40%), two herbicide mix treatment can expand the killing of grassspectrum. The suitable dosage to Angelica seedling is Napropamide+Prometryme 2kg/hm~2, the effect of weed eradication achieve above 85%.Although Pendimethalin(Availability content:33%) had a good effect of weederadication in 4kg/hm~2, but had the influence on coming up out of land ofAngelica seedling, further more, had the inhibition to Angelica normalgrowth judged from height and fresh weight. It is tend to have the chemicaldamage if only using Prometryme to Angelica seedling, the damage grade is7 on potted seedling in greenhouse, the damage grade is 1 and 3 in the fild.The suitab(?)e herbicide to Angelica annual seedling is Napropamide+Prometryme, the dosage is 2kg/hm~2, the optimal stem leaf treating compoundis Sethoxydim, the dosage is 2L/hm~2.This article also aimed at the Angelica which a year recovered to carryon the pesticide residue experiment, had proven in Angelica dry root, hadPrometryme residue, the residual dosage probably was 0.42mg/kg.This article also carried on a discussion on pesticide residue simpledetermination method, the results indicated that UV spectrophotometry could applied in the determination of related Prometryme residue, thedensity in the 0.5mg/kg-3mg/kg scope had the extremely reliable sensitivityand the accuracy.