Scientific name: Trachea tokionis (Butler). Synonyms: Agrotis tokionis Butler. Family: Lepidoptera, Noctuidae. Common names include black worm, silkworm, cutworm, and corn borer. This species is widely distributed across northern Heilongjiang, Inner Mongolia, and extends as far south as Fujian, Jiangxi, Hunan, Guangxi, Yunnan. Host plants include vegetable seedlings, corn, tobacco, cotton, and fruit trees. The larvae are particularly destructive to young crops, feeding on leaves and stems, which can lead to significant yield loss if not controlled. Damage symptoms resemble those of the "small tiger" pest, with larvae causing wilting, stunting, and even death of seedlings. The adult moths are nocturnal and are attracted to light sources, making them easy to monitor for early detection. Morphologically, the adult moth has a body length of 20–22 mm and a wingspan of 45–48 mm. The head and thorax are brown, with two black spots on the outer edge of the lower lip. A dark horizontal line runs across the neck plate. The forewings are grayish-brown with a dark brown central area, while the hind wings are light yellowish-brown. Eggs are hemispherical, measuring about 1.8 mm in length and 1.5 mm in height, changing from light yellow to grayish-brown before hatching. Mature larvae reach up to 61 mm in length, with a yellow-brown coloration and wrinkled surface. Their heads have a pair of dark brown vertical stripes, and their abdominal segments feature small, indistinct markings. The pupal stage is dark brown with a long oval shape and wrinkled texture. The life cycle of this pest involves overwintering as larvae in the top soil layer, emerging in early March in the Yangtze River region. They become active in May, and when temperatures rise above 20°C, they enter diapause during summer. Adults emerge in mid-September, and females can lay up to 1,000 eggs. The egg stage lasts 11–24 days, while the larval stage can extend for over 300 days. Control methods include forecasting using black lights or sweet-and-sour traps to monitor adult populations. Field surveys help estimate larval density, guiding timely intervention. Agricultural practices such as removing weeds in early spring reduce oviposition sites. Trapping techniques include black light, sweet-and-sour liquid traps, bait trapping, and weed-based traps. Chemical control options include insecticides like 40.7% chlorpyrifos emulsifiable concentrate, 2.5% deltamethrin, 20% fenvalerate, and others, applied either as foliar sprays or soil treatments. Proper timing and application are crucial for effective management. STDs Infectious Bioantibody Biotechnology Co., Ltd. , https://www.bioantibodymedical.com