Codonopsis, scientifically known as *Aspidiotus destructor* Signoret, is a species belonging to the family Diaspididae (armored scale insects) under the order Hemiptera. It is also referred to by other names such as *Codonopsis cuspidatum*, yellow thin cocoon, papaya scale, malignant roundworm, and yellow thin roundworm. This pest is widely distributed across China, including provinces like Liaoning, Hebei, Shandong, Shanxi, Henan, Shaanxi, Jiangsu, Zhejiang, Fujian, Taiwan, Hubei, Hunan, Jiangxi, Guangdong, Guangxi, Sichuan, and Yunnan. It affects a wide range of host plants, including tea, camellia, coconut, citrus, banana, mango, lychee, papaya, and grapes. The damage caused by this insect is significant. The pests gather on the underside of leaves or young shoots, where both females and nymphs feed by sucking sap. This feeding leads to the formation of yellowish spots on the leaf surface, causing premature leaf drop, stunted growth of new shoots, and a general weakening of the plant’s health. In terms of physical characteristics, the adult female has a nearly round shell with a diameter of about 1.8 mm. The shell is colorless to white, thin, and semi-transparent, often with a yellow or white center. The male's shell is slightly oval, similar in texture and color but smaller, measuring around 1.1 mm in length. Males are bright yellow, have dark brown compound eyes, and possess a needle-like reproductive organ at the end of their abdomen. Eggs are small, measuring 0.1 mm, and are oval-shaped with a yellow-green color. Nymphs are yellowish-green, rounded, and flat, with one pair of antennae, three pairs of legs, and a single tail hair at the end of the abdomen. The life cycle of *A. destructor* varies by region. In Guizhou, there are two generations per year, while in Zhejiang, Jiangsu, and Hunan, there are three generations. In Fujian, up to four generations occur, and in tropical regions, there can be as many as seven to twelve. All generations overwinter as fertilized females. In Guizhou, the first generation of nymphs begins hatching in mid to late April, with males emerging in late May and early June. The second generation starts hatching in mid-July, with males appearing in mid-September. In Zhejiang, each generation typically emerges from late April to early May, mid-July, and late September to early October. During winter, all stages—adult females, males, and nymphs—are present. First-instar nymphs hatch in late January, and second-generation nymphs emerge in May. Each female can lay more than 100 eggs. Natural enemies of this pest include ladybugs, grasshoppers, and parasitic wasps, which play an important role in biological control. Control methods include maintaining good ventilation and light conditions in the plantation, proper pruning, and appropriate planting density. During the nymph stage, it is effective to spray 10% dichlorvos EC diluted 1000 times or 50% pine oil EC at 1000 times concentration. Another option is using 40% cull EC diluted 1500 times, which has shown a 97.7% control rate against scale insects. Organophosphate insecticides like Quick-pumping EC are particularly effective because they can penetrate wax layers and kill both the insect and its eggs. This type of insecticide can be applied at any time during the infestation, making it very versatile. With consistent use over 2–3 years, scale insect populations can be effectively eliminated. Additionally, protecting natural predators such as ladybugs and parasitic wasps helps maintain a balanced ecosystem and reduces the need for chemical interventions.

Low-Pressure Chassis Parts

This classification mainly includes the aluminum low-pressure casting Machinery Parts using in Chassis area.
Normal raw material: A356.ZL101A.ZL101.AlSi7Mg
The pressure on the surface of the molten metal is 0.06~0.12Mpa.This processing has good shrinkage, casting tissue is dense, easy to produce the large thin-walled complex parts, the casting head is not needed , metal yield can be up to 95%.
Process Technology: Low-pressure casting,T6 Treatment,Shot Blasting,NC Machining,Spray Coating
Product Dimensions: Customized
Casting General Tolerance: Grade GBT6414-CT8
Flow Processes: Die casting, Degating to remove the residual of the gate, Polishing and Deburring to remove the burrs, Polishing to remove the parting line, flash,CNC Turning, Cleaning, Packaging, Storaging, Shipping
Control Measure: Incoming Material Test, First Article inspection, Routing inspection, Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge
Application: Machinery Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo

Aluminum Low-Pressure Chassis Parts,Al Low-Pressure Casting Chassis Parts,Low-Pressure Casting Chassis Parts

NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.casting-part.com