Scientific name Arge pagana panzr Hymenoptera, leaf bee family. Distributed in Henan, Beijing, Hebei and other provinces and cities.
The host rose, rose, rose, yellow thorn and other medicinal plants and flowers.
The larvae feed on the nicks or holes in the larvae. The larvae are clustered on the leaves with ten heads. The leaves can be eaten and only the leaf veins remain. Females lay their eggs on shoots and shoots to die, affecting growth and quality.
Morphological characteristics Adult body length 7.5mm, wingspan 17mm. Wing black translucent. Head, chest and feet black, shiny belly orange. Antennae whip 3, black. Egg oval, slightly green. The last instar larvae have a body length of 23 mm, slightly light brown at the time of initial hatching, and light yellow heads and yellow-brown after aging. There are 3 horizontal black dot lines at each part of the crotch, and small bristles at the black spots. 6 pairs of abdominal feet. White. Dark yellow, oval.
Living habits 2 generations old in Beijing, with larvae in the soil for the winter. In spring-April-May, the emergence of adult ecloses enters the first generation of larvae in June. The first-generation larvae matured in early July and were used for placidification. In mid-July, adult eclosion occurred in 1 generation. The 2nd generation larvae hatched in early August and entered the peak of the 2nd generation larvae in the middle and late August. In the second half of September, the 2nd generation larvae overwintered. When females lay their eggs, they use the oviposition tubes to pierce the vertical shoots on the host's new shoots. After producing 30-40 eggs in the females, the spawning sites turn black in the longitudinal direction. After hatching, the shoots are almost cracked or darkened and the eggs are broken. About 7 days, the newly hatched larvae cluster on the leaves.
Prevention and control methods (1) In the adult spawning period, timely cutting off the shoots of the eggs and catching the larvae in the larval stage. If necessary, dig in the vicinity of medicinal plants or flowers in winter and spring to eliminate overwintering larvae. (3) During the larval stage, spray 80% of dichlorvos EC 1000 times or 90% of crystal trichlorfon 800-900 times, 50% of CASS Loxoxiedis 1000 times, 50% of phoxim EC 1000-1500 times, 20 5% chrysanthemum killing cream 2000 times, 2.5% chrysanthemum buttermilk 2000-2500 times.
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