Angelica sinensis yellow Phoenix butterfly

Angelica yellow butterfly, also known as fennel butterfly, belongs to Lepidoptera, Butterfly family.

The main results are as follows: 1. the larvae are harmful to the larvae and bite the leaves at night, resulting in a lack of engraves. in severe cases, the leaves are eaten up, leaving only petioles and veins, and flowers and fruits are also eaten. The insect has a large food intake, which seriously affects the growth of Angelica sinensis and reduces the yield.

2. Morphological characteristics.

Adults: large butterflies, which can be divided into spring and summer types. The summer type is about 25 mm long, the wingspan is 90 mm, and the spring type is slightly smaller. The body is yellow, with black stripes running through the back. The front and rear wings are yellow, and the outer edges and wing veins are black, forming yellow and black markings. The base of the forewing is black, scattered with yellow scale powder. The rear wing also has yellow-black markings, and there are 1 reddish-brown round spots at the trailing edge, surrounded by 6 blue spots of different sizes.

Eggs: yellowish, spherical.

Larvae: black at first incubation, green after the 3rd instar, with a body length of 52mi 55mm, with two black stripes on the head, and short black horizontal stripes on the back of each segment of the chest and abdomen.

Pupa: yellowish green or yellowish brown, long slightly curved, with two horns on the head and a small protuberance on the back and side of the chest.

3. The law of occurrence and damage occurs for 3 generations in a year, and the pupa is attached to the branches to survive the winter. The first generation of larvae occurred from May to June and the adults emerged from June to July. The second generation of adults occurs from July to August. The adults are active during the day and lay eggs on Angelica leaves. After hatching, the larvae lurk under the leaves during the day and bite the leaves at night. The damage is more serious from May to June and from late July to August. After October, the larvae pupate and overwinter.

4. Control measures ① larvae were killed artificially in the early stage of larval occurrence and before the 3rd instar stage, combined with field management. During the occurrence of ②, 90% trichlorfon was sprayed with 1000 times solution, once a week, and 2 Mel was sprayed 3 times.