Wheat field moth
The scientific name of this insect is *Dolycoris baccarum* (Linnaeus), belonging to the order Hemiptera and the family Polygonaceae. It is commonly known as "fine hair" or "smelly big sister." This pest is found throughout the country, making it a widespread agricultural concern.
This species attacks a wide range of crops, including wheat, barley, millet, corn, cabbage, rape, radish, peas, carrots, onions, and many others. Its feeding habits can cause significant damage to various plants, especially during the early growth stages.
The adults and nymphs feed by sucking sap from young leaves, tender stems, and flower spikes. This feeding results in yellow-brown spots on the leaves and stems. In severe cases, the leaves may curl, and young shoots may wither, which can hinder plant growth and reduce crop yields. Damage is often most noticeable in the early spring when the pests become active.
Morphologically, the adult *Dolycoris baccarum* 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 with dense white hairs and small black markings. Its antennae are black and white, thin, and extend close to the ventral surface of the head. The scutellum, a triangular plate at the back, is smooth and yellow-white in color.
In terms of life cycle, *Dolycoris baccarum* completes two generations per year in Inner Mongolia. Adults overwinter in fields among weeds, leaf litter, plant rhizospheres, bark, and eaves. They become active in early April, laying eggs in mid-April. The first generation of larvae hatches in late April to early May, and the first adults emerge in early June, laying eggs again in mid-June. A second generation of larvae appears in early July, and adults begin to appear in mid-August, continuing their cycle until they prepare for winter.
Eggs are laid in neat rows on the front of the crop, within buds, or in fruit bracts. Nymphs typically start feeding after reaching the second instar stage. Early detection and timely intervention are crucial for effective control.
For prevention and control methods, refer to the section on "Second Star," which provides detailed strategies such as cultural practices, biological control, and chemical treatments depending on the infestation level and crop type.
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