The scientific name Dicladispa armigera (Olivier) is a Coleoptera, a family of iron. Located in the rice fields south of Liaoning, China.
Host rice, wheat, sugar cane, white rice, reeds and so on.
The larvae infiltrate into the leaf tissue to feed on the leaf flesh. When the damage is heavy, the larva presents with a bluish white, which affects the growth and development.
Morphological characteristics Adult body length 4-5mm, blue-black, with a metallic luster, prothesis in front of the back, both sides have a knob-like protrusions, the upper four spines, with a larger spine on both sides of the rear. The sheath wings are sparse on each side with 20 to 21 spines of varying lengths. Oval flat oval, milky white, covered with yellow-brown gelatinous material. The last instar larvae were 5–6 mm in length, with two rows of knobs on the back of the mid-thoracic to seventh abdominal segment, and triangles on both sides of the abdomen. 5mm long, flat oval, milky to dark yellow.
Living habits Jiangxi, Hunan, Hubei, Zhejiang, 3 generations of old, Guangdong, 4-6 generations, adults in the earth and stone crevices, weeds or leaf sheaths of the overwintering. At the beginning of the spring in Sakamoto
Weeds on the weeds or in the wheat fields, moved into the paddy fields and spawned eggs in the tissues 12-18cm from the tip of rice leaves. Newly hatched larvae sneaked into the leaf tissue to feed the leaves, and they could turn 2-3 leaves in one lifetime. Most of them were transferred in the early morning. The larval period is 10-15 days and the flood season is 4-9 days. Adults like to feed or move at night or early morning and rainy days. The life span of adults is 30-40 days in the first and second generations and 6-7 months in the winter.
Prevention methods (1) Pay attention to eradicate the weeds beside the fields and the ditch. (2) In the period of adult emergence, rice is in the paddy field, and the water is used to flood the loquat tip. At the same time, straw is used to trap the adults floating on the surface of the water and concentrate or burn it. (3) The adult stage of Daejeon is at its peak, spraying 50% of the acacia pine EC 800 times per 667m2. It is also possible to spray 90% crystals of trichlorfon 900-1000 times during the incubating period of a generation of larvae.
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