Boxwood is the main garden evergreen ornamental plant. In recent years, due to the carelessness of the introduction of species, the boxwood silk borer has harmed the two small-leaved boxwoods of boxwood and bird-tongued boxwood from south to north. From the larvae feeding on the leaf flesh to the nest of the silk knot to conjugate the leaves together, it seriously affects the growth of boxwood and even causes the entire plant to die.
Morphological characteristics and occurrence patterns: adults are white-brown, the wings are white and translucent, the forewings are brown, the middle chamber has a fine white spot and curved crescent-shaped white spots, and the outer edge of the hindwings has brown bands. The larval head is dark brown, the carcass is thick green, the dorsal line is dark green, the sub-dorsal line valve is light black brown, and the segments have bright black-brown nodular protrusions. It can reproduce three generations a year. The overwintering larvae begin to be active in early April, emerge in mid-to-late July, and regenerate the third generation of second-generation larvae in early to mid-September (Xi'an area).
Prevention and control methods: 40.7% chlorpyrifos emulsion 1000-2000 times liquid, 50% octyl thiophos emulsion dilution 1000 times, 40% oxidation of Leguo dilution 1000 times, 80% dichlorvos dilution 2000 times spraying, 7 days 1 time, a total of 3 times, the prevention and treatment of early young age can receive better results.
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