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Detailed Explanation of Methods and Techniques for Angelica Pest and Disease Control

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Root rot: Soak seedlings in 1:1:150 Bordeaux mixture, disinfect and insecticide-treat the soil: burn and fumigate the soil more in seedling beds. Brown spot: Pay attention to field sanitation, promptly remove diseased leaves, and in the middle and late stages spray 1:1:150 Bordeaux mixture once every 7 days. Pests: Mainly green peach aphid, commonly known as "oil worm." It multiplies in large numbers during May, densely gathering on the undersides of leaves of new shoots and tender leaves of angelica to suck sap, causing heart leaves and tender leaves to thicken, curl into a fist-like shape, and the plant to become stunted. Control methods: Clear weeds around the field to reduce opportunities for aphid migration; when aphids occur

Root rot: Soak seedlings in 1:1:150 Bordeaux mixture, disinfect and insecticide-treat the soil: burn and fumigate the soil more in seedling beds.

Brown spot: Pay attention to field sanitation, promptly remove diseased leaves, and in the middle and late stages spray 1:1:150 Bordeaux mixture once every 7 days.

Pests: Mainly green peach aphid, commonly known as "oil worm." It multiplies in large numbers during May, densely gathering on the undersides of leaves of new shoots and tender leaves of angelica to suck sap, causing heart leaves and tender leaves to thicken, curl into a fist-like shape, and the plant to become stunted.

Control methods: Clear weeds around the field to reduce opportunities for aphid migration; when aphids occur, spray 40% dimethoate 2000x solution or 5% fenitrothion 1000x solution, once every 5-7 days, for 2-3 consecutive times.

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