The scientific name Psylliodes punctifrons Baly belongs to the order Coleoptera. Alias ​​dish blue jumper. Distribution north from Hebei, Shanxi, Shaanxi, Gansu, Xinjiang, south to Taiwan, Fujian, Jiangxi, Hunan, Guangxi, Yunnan; from the east coast, west to Gansu, Xinjiang, Shaanxi and then folded into Sichuan, Yunnan, Tibet. Recently, it has been reported that its closely related species of rapeseed (P. chrysocephala L.) has been occurring in Tianshui, Gansu, for three consecutive years since 1994 and is seriously endangered. Host rapeseeds and various cruciferous plants. Morphological characteristics Adult body length 3mm, width 1.5mm, long oval, slightly narrow head and tail, blue back with green luster, ventral black. Antennae black, 10 slender, base 2 and 3 brown yellow; black foot, front and midfoot intestine with brown, hind leg black. The top of the head is engraved in detail; the frontal tumor is not prominent; the antennae are wide, convex, and the base of the lip is covered with fine hairs. The tentacles extend backwards, approaching the middle of the elytra, the length of the second and third quarters, the length of the fourth, and the end of the fourth. The section is short and thick; the prosthodontic plate is sub-square, wider than long, straight at the sides, and the surface is finely engraved. The scutellum is not engraved, has a slight purple luster, and has a coarse engraved spot on the elytra, and is arranged in 11 columns. Larvae body length 7-8mm, yellow-white, slightly flat. The head, front thoracic plate, distal segment of the back plate and each section of the hairs are brown, and the distal section of the back plate is bifurcated. Control methods (1) Pay attention to the protection of rape seedlings before the 4 leaf stage. Before the adult eggs are laid or the larvae have invaded the leaf tissue, spray 40% Omethoate EC or 25% ECS 1000 to the stem base and leafhoppers. 1500 times. (2) The old leaves of the base were removed before and after the flowering of the rape, and they were buried deep in the field or burned to destroy a large number of larvae. (3) It is also possible to spray 2.5% phoxim powder or 2% batadine powder per 667m2 2kg before adult spawning in the middle or late October of the fall. Auto Safety Kit,Car Auto Emergency Safety Kits,Car Emergency Kits,Safety Car Kits In Bag RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com
The larvae break into the rhizomes, and the tissues drilled into the leaves upwards form a submarine path, causing the rape to dry and die; the adults eat the leaves of rapeseed and pods, causing many scars, and bite the edges of the leaves into ulcer-like holes. The manure left many feces and excrement.
Life habits Shaanxi and Gansu are born 1 year old, and adults spend their winters in the earth seam or under the heart and dead leaves. In the early spring of the following year, the eggs were laid in the topsoil around the roots of the rapeseed. In mid-March, hatching larvae began to damage the rapeseed roots. In the summer, the leaves were mainly damaged. When the plants were bolted and the old leaves of the roots gradually dried off, the larvae emerged from the petiole and stems. Transferring or immersing in roots, stems, branches, or leaves that are not shed in the upper part continues to harm. The larval period is about 1 month and the flood period is 18 days. In late May, the animals became adults and they continued to injure flowers and pods. The yellow rapeseed was ripe and transferred to the soil or weeds. After the emergence of rape in autumn, they moved in and killed. In continuous cropping, seedlings are often killed after the cotyledons have not been excavated. The new emergence adults have upward tendency and clustering, and they prefer to gather and feed on the top of the main stem and the tip of the pods, especially when the rape is not mature. In addition there is tropism. Adults in the field are planted by yellow-smelling plants to late-maturing green-blue areas, and when they are disturbed, they fall to the ground to suspend animation, but they recover quickly and generally do not easily shift.
Rape