Common Pests and Control Methods of Wisteria Flowers
Wisteria flowers, as an important ornamental plant in summer, often suffer from pest infestations that lead to shortened blooming periods and weakened tree vigor. Mastering scientific pest control methods can not only ensure the healthy growth of the plants but also extend the ornamental period. This article provides an in-depth analysis of two major pests and offers systematic solutions.
Wisteria Speckled Aphid Control System
Typical Characteristics of Speckled Aphid Pest
This pest occurs in 5-8 generations annually in the northern regions, with the peak hatching period of overwintering eggs concentrated in May to June. The insects cluster on the back of tender leaves to absorb sap, causing leaf curling and deformation, and in severe cases, triggering a sooty mold chain reaction. During the peak pest season, a large amount of honeydew can be seen on the surface of branches and leaves, which shows a distinct reflection under sunlight.
Three-Level Control Strategy
Physical Control: Implement bark scraping in early spring, focusing on the junctions of branches, and use yellow sticky traps to intercept more than 70% of migrating aphids. Biological Control: Release Harmonia axyridis larvae at a ratio of 1:50 or hang lacewing egg cards for continuous control. Chemical Intervention: Alternate the use of 40% omethoate emulsion (diluted 1500 times) and rotenone suspension (2000 times liquid), maintaining a 7-10 day application interval.
Wisteria Wax Scale Pest Solution
Key Points for Pest Identification
This pest occurs in two generations per year and overwinters in egg sacs. After hatching, the nymphs quickly spread to the leaf axils, forming a white waxy protective layer. Affected plants show a progressive decline: initial leaf chlorosis, mid-term gum flow on branches, and later stages trigger sooty mold leading to the whole plant turning black. When the pest density reaches 5 insects/cm², the defoliation rate can reach 60% or more.
Comprehensive Control Plan
Winter Cleaning: Use a high-pressure spray gun to remove overwintering egg sacs from branches and trunks, and apply lime sulfur solution to the entire plant. Physical Barrier: Apply a high molecular film agent to form a breathable protective layer, lasting for 20-25 days. Use of Natural Enemies: Place 3-5 red spotted lady beetles per square meter to establish a biological control network. Precise Medication: Select 40% cypermethrin emulsion (1000 times liquid) and spray it focusing on the branching points of branches. The control effect reaches 95% within 48 hours after application.
Wisteria Health Care System
Establish a "Three Controls and Three Promotions" management mechanism: control nitrogenous fertilizer to promote phosphorus and potassium, control density to promote ventilation, and control irrigation to promote root growth. Implement annual deep soil turning and maintain a soil pH value between 6.0-7.5. Prune promptly after flowering each year, retain 3-5 main branches to form an open tree canopy, and enhance the plant's resistance to adversity.
By implementing the above systematic control plan, the incidence of wisteria pests can be reduced by 80% or more. It is recommended to establish a pest monitoring record, carry out preventive treatments based on phenology, and pay attention to the rotation of pesticide use to avoid resistance. Only by combining biological control, physical prevention, and precise medication can sustainable healthy care for wisteria flowers be achieved.