Scientific name Phytoecia rufiqentria Gautier is a Coleoptera, Cerambycidae. Aliased chrysanthemum tiger, cricket insectivore, etc. Distribution of Sichuan, Anhui, Beijing, Zhejiang, Shaanxi and other provinces.

Host chrysanthemums, Atractylodes, capillaris, worms, Ainajin and so on.

Characteristics of the culprit Adult worms feed on the epidermis at about 10 cm from the tip of the shoot. Long stripe markings occur. When the eggs are laid, the stems and sheaths of the chrysanthemum are bitten into small holes, causing the stems and sheaths to lose water, wilt, or break. The larvae feed on the larvae, making it impossible for the affected branches to bloom or the whole plant to die.

Morphological characteristics Adult cylindrical, black head, chest and elytra, body length 11-12mm. The antennae are 12 lines long and nearly equal in length to the body. The center of the pronotum is l-orange-ovoid, with gray hair on the elytra, abdomen and feet orange. Male antennae are longer than their bodies and their females are shorter. Eggs 2-3mm long, long oval, light yellow, smooth surface. The last instar larvae are 9-10mm in length, cylindrical, milky to pale yellow, and small in size. The pronotum is nearly square, brown, and has a white longitudinal pattern in the center. The thoracic foot is degenerated, the abdomen is rounded at the end and has dense long bristles. 9-10mm long, yellowish-brown to yellowish brown. The abdomen does not have many bristles.

Life habits 1 generation per year, larvae, cockroaches or adults lurking in the roots of the Asteraceae plant winter, larvae often account for 50%, adults and cockroaches account for about 1/4. In the April-June period of the following year, adult worms go out and enter the larval infestation period in late May and early August, and begin wintering in the middle and late August and mid-September. The insects are active during the day and are most active from 9 to 10 and from 15 to 16 hours. They mostly copulate in the morning, spawn at 14 to 15 o'clock, and have egg production. The egg period is 12 days. The newly hatched larvae feed on the stems from the top down, and when they reach the base of the stems, the larvae evacuate from the side, and the undeveloped larvae transfer their strains from the bottom upwards, and the larval period is about 90 days. The larvae overwinter in the rhizomes or develop into crickets or emerge as adult wintering. Natural enemies include the red-bellied bee, the bee-bee, and the swollen bee.

Prevention methods (1) Each year when the mother plants of the Chrysanthemum roots are propagated in the roots in late April and early May, the overwintering adults are investigated in the excavated root soil. From June to July, it enters the active period of the adult, killing adults and killing eggs in the field in the early morning when the dew is not dry. (2) When the stems and sheaths of the chrysanthemums were found wilting, they were removed 4-5mm below the broken stems and concentrated. (3) Look for fresh wormholes and inject 40% Dimethoate EC or 50% CASA Lozenge EC or 50% Dichlorvos EC 200 times with a syringe to allow the agent to enter the tunnel and seal the wormhole with mud. Can also be used 3% phoxim granules 0.3g wrapped cotton balls from the wormhole stuffing, external cotton plug.

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