Methods and Technical Key Points for the Prevention and Control of Pests and Diseases in Polygonatum
(1) Black spot disease occurs mostly in spring, summer and autumn, and damages the leaves. Control methods: clean the garden at harvest time to eliminate diseased plant residues; in the early stage, spray 1:1:100 Bordeaux mixture once every 7 days, for 3 consecutive times. (2) White grubs damage plants in the larval stage, attacking the roots, biting off seedlings or gnawing the seedling roots, causing broken seedlings or cavities in the roots, and the damage is severe. Control methods: seed dressing with 75% phoxim emulsifiable concentrate at 0.1% of the seed amount; or during the field occurrence period, drench with 90% trichlorfon at 1000 times dilution.
(1) Black spot disease occurs mostly in spring, summer and autumn, and damages the leaves. Control methods: clean the garden at harvest time to eliminate diseased plant residues; in the early stage, spray 1:1:100 Bordeaux mixture once every 7 days, for 3 consecutive times.
(2) White grubs damage plants in the larval stage, attacking the roots, biting off seedlings or gnawing the seedling roots, causing broken seedlings or cavities in the roots, and the damage is severe. Control methods: seed dressing with 75% phoxim emulsifiable concentrate at 0.1% of the seed amount; or during the field occurrence period, drench with 90% trichlorfon at 1000 times dilution.