The Prevention and Control of Dahlia Willow Bat Moth

Willow bat moth, also known as Oriental bat moth, belongs to Lepidoptera, Bat moth family.

Distribution and damage distribution in Heilongjiang, Jilin, Liaoning and the former Soviet Union, Japan and other places. Damage a variety of flowers and trees.

Injury larvae harm the branches, stems, and scuttles are often in a concave ring shape, and are covered with wood chips by wire mesh to form wood chips packets.

Morphological characteristics Adult body length 35-44 mm, 66-70 mm wingspan. Body powder brown to dark brown. Antennas are short-lined. The ring-shaped markings on the front edge of the forewings have a dark green, angular pattern in the center, and two broad brown oblique bands on the outside of the markings. The hind wings are narrow and the abdomen grows. Ovoid, 0.6-0.7 mm in diameter, black, slightly shiny. The larvae are dark brown, chest and abdomen stained white, cylindrical, with brownish knobs, and the mature larvae are 44-57 mm long.

Life history habits are mostly 1 year in Liaoning, 1 in 2 years, wintering on the ground with eggs, or wintering at the base of larvae. Hunchun begins to hatch in mid-May. In early June, it turned to fruit and vegetable stems in weeds or weeds. In early August, it began to evaporate in late September. Embryated as adult in late August. Feathering is in mid-September and finally in mid-October. After the emergence of adult worms, they lay eggs. Overwintering with eggs. Part of the late hatching larvae, or other larvae that interfere with developmental delay, use the larvae to overwinter. In the following year, the juveniles began to emerge as adults in the month of July, and then spawned for 2 generations in 1 year. Adults are mostly focused on emergence at 16-18. During the day, the adults are suspended from trunks, undergrowth, or weeds until they start flying, mating, and spawning after sunset. Adults are backlit. Immediately after copulation, spawning, there is no certain place for spawning, the majority of trembling with the two wings, the eggs were produced one after another, and some of the side of the tail spawning; most do not lay on spawning. Females range in egg production from a few hundred to thousands of grains.

Control methods 1. Cut off seedlings and branches with wood chips. 2. Chemical control: When the early instar larvae are active on the ground from late May to early June, spray 50% parathion 1000 times onto the ground. When the middle-aged larvae were transferred to the trunk, they were introduced into the wormhole 10 times with 50% dichlorvos.

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