Which diseases and insect pests need to be controlled in planting Angelica dahurica?

Which diseases and insect pests need to be controlled in planting Angelica dahurica? Please introduce the control methods of angelica dahurica dahur The disease is caused by a half-known fungus in fungi and mainly harms leaves. The disease spot was dark green at the initial stage, then expanded into white and fused into polygonal spots, and then small black spots appeared on the diseased leaves in the later stage, resulting in leaf death. Generally, the disease began at the beginning of May and was harmed for a long time. It is an important disease of Angelica dahurica. Angelica dahurica. Control methods: in order to reduce the source of disease, increase the application of organic fertilizer, improve soil and enhance disease resistance. When diseases occur in production, the former (gray spot) can use 1 ∶ 1.5 ∶ 300 Bordeaux solution or 65% Dysen zinc 500 times solution. Since June, the latter (spot blight) can be sprayed with 1 ∶ 1 ∶ 100 Bordeaux liquid for 2 times to prevent infection and enlarge the harm. 2. Insect pests: the pests of Angelica dahurica are mainly at seedling stage and flowering stage. Aphids, heart-eating insects and yellow Phoenix butterflies often eat up leaves or flowers, which affect plant development and fruit ripening. Heart-eating insects bite seeds and, in serious cases, can cause no seed harvest. Control methods: artificial hunting can be carried out during the active period of larvae. The former was sprayed with dimethoate 2000 times and dichlorvos EC 1000ml 1500 times, while the latter sprayed 1000 times of 90% crystal trichlorfon, once every 5 times every 7 days for 2 times in a row. Click to get more planting techniques of Angelica dahurica