Pest Control for Hairy Jasmине
As one of the three famous fragrant flowers in the courtyard, Hairy Jasmине is deeply loved by gardening enthusiasts for its pure and fragrant white flowers. However, phenomena such as curling and yellowing leaves, and stagnant growth often plague planters, which are often closely related to pest infestations. This article systematically analyzes the control measures for two typical pests: leaf-rolling moths and red spiders.
Main Types of Pests Affecting Hairy Jasmине
Analysis of Leaf-Rolling Moth Infestation Characteristics
This鳞翅目 pest prefers young leaves, and its larvae spin silk to roll leaves into tubes to hide and eat the leaf flesh. Affected plants will show leaf perforations and shrinkage of the growing points, leading to delayed flowering or even bud drop. The peak period of pest outbreaks is from April to June, during the transition from spring to summer.
Damage Caused by Red Spiders
Red spiders, with a body size of less than 1 millimeter, gather on the backs of leaves to suck sap. Initially, they cause green spots on the leaves, and in severe cases, the entire leaf turns yellow and falls off. Their reproductive capacity is astonishing, with a generation completed in just 5 days at 28°C, requiring special vigilance against outbreaks in dry environments.
A Three-Level Pest Control System
Chemical Control Methods
For leaf-rolling moths, it is recommended to use 25% Triazole Tin wettable powder, diluted at a ratio of 1:1500 and sprayed mainly on the tender shoots. For red spider control, it is suggested to alternate the use of 20% Trichlorphon (1:1200) and 5% Abamectin (1:2000) to avoid resistance.
Physical Control Techniques
Regularly check for signs of red spider activity on the back of leaves and remove eggs immediately by hand. Setting up yellow sticky traps can lure and kill adult leaf-rolling moths, and combining this with weekly rinsing of the leaf backs can effectively control pest density.
Biological Control Strategies
Introduce ladybirds (which can consume 80-100 red spiders per day) or lacewing larvae (which can consume over 200 red spiders per week) to establish an ecological balance. Planting insect-repelling plants such as mint and rosemary around the plants can form a protective barrier.
By establishing a preventive disinfection system (applying lime sulfur solution once in spring and autumn), improving ventilation and lighting conditions (keeping a plant spacing of over 50cm), and reasonable fertilization (adding potassium silicate to enhance resistance), the incidence of pests can be reduced by 70%. It is recommended to use an electron microscope for regular detection to achieve early pest detection and treatment.