There are two common diseases of Syringa fulva: brown spot and coal pollution.
It usually occurs in the first ten days of June. Control method: spray with 75% chlorothalonil wettable granule 1000 times liquid or 70% mancozeb wetting particle 400 times liquid. Once a week, continuous spraying for three to four weeks can effectively control the disease.
The outbreak occurs in early July or late August. Prevention and control method: can use 43% herculex 3000 times liquid or 75% chlorothalonil wettable particles 800 times liquid, spray once every seven days, spray three or four times continuously, you can see the improvement of the condition.
Common insect pests of Syringa spinosa are red spider and sawfly.
If red spider is found, it can be killed with 1500 times solution of 0.36% matrine.
If there is a cut leaf bee, it can be controlled by 20% insecticidal net 1000 times liquid spray, and it can also be artificially killed.
