Wheat field moth
The scientific name of this insect is *Dolycoris baccarum* (Linnaeus), which belongs to the order Hemiptera and family Polygonaceae. It is commonly known as "fine hair" or "smelly big sister." This pest is widely distributed across the country, making it a common agricultural concern.
This species attacks a wide range of crops, including wheat, barley, millet, corn, cabbage, rape, radish, peas, carrots, and onions. Its feeding behavior can cause significant damage to various plants, especially during the early growth stages.
The adults and nymphs feed on the sap of young leaves, tender stems, and flower spikes. As a result, yellow-brown spots appear on the damaged tissues. In severe infestations, the leaves may curl, and young shoots may wither, which hinders plant development and reduces crop yield. The damage is often most visible in the early stages of plant growth, when the plant is still vulnerable.
The adult insect measures between 8 to 13.5 mm in length and about 6 mm in width. It has an oval shape, with a color ranging from yellowish brown to purple. The body is covered in dense white hairs, along with small black engraved points. The antennae are black and white in color, and they are thin and slender, extending close to the ventral surface of the head. The scutellum, a triangular plate at the back, is blunt and smooth, with a yellow-white appearance.
In Inner Mongolia, this species completes two generations per year. Adults overwinter in fields among weeds, leaf litter, plant rhizospheres, bark, and under eaves. They become active in early April, and egg-laying begins in mid-April. The first generation of larvae hatch in late April to early May, and the first-generation adults emerge in early June, with egg-laying occurring in mid-June. The second generation of larvae appears in early July, and the adults begin to form in mid-August. By the end of the month, they prepare for winter dormancy.
Eggs are laid in neat rows within the buds, fruit bracts, or on the front parts of the crops. Newly hatched nymphs start feeding on the plants after the second instar stage, causing further damage. The life cycle is closely tied to the growth of host plants, making timing of control measures crucial.
For prevention and control, it is recommended to follow integrated pest management practices, such as monitoring populations, using resistant crop varieties, and applying targeted pesticides when necessary. Early intervention is key to minimizing damage and protecting crop yields.
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