What are the control measures for the box tree pyralid (Diaphania perspectalis)?

Boxwood is a major evergreen ornamental plant in gardens. In recent years, careless introduction of plants has allowed the box tree pyralid (Diaphania perspectalis) to damage two small-leaved boxwood species, Buxus sinica and Buxus bodinieri, from south to north. From the larvae feeding on the leaf mesophyll to spinning silk to make nests and binding leaves together, it severely affects boxwood growth and can even kill the affected plants entirely.

Morphological characteristics and occurrence pattern: The adult has a white-brown body and white, semi-transparent wings; the front edge of the forewings is brown, the medial cell has a fine white spot and a curved crescent-shaped white spot, and the outer margin of the hindwings has a brown band. The larval head is black-brown, the trunk is dark green, the dorsal line is dark green, the subspiracular line above the spiracles is pale black-brown, and each segment has shiny black-brown wart-like protrusions. It can produce three generations a year. In early April, the overwintering larvae begin activity; the first generation appears in mid-to-late July, and the second-generation larvae produce a third generation in early-to-mid September (Xi'an area).

Control methods: Use 40.7% chlorpyrifos emulsifiable concentrate at 1000-2000 times dilution, 50% phoxim emulsion diluted 1000 times, 40% omethoate diluted 1000 times, and 80% dichlorvos diluted 2000 times for spraying, once every 7 days, 3 times in total, which can achieve good results against young larvae in the early control period.