The oysters are mainly responsible for leeks, and also damage onions, green onions and garlic. Larvae accumulate in the roots, bulbs, and pseudo-neck of leeks, and they feed mostly from the rhizome or bulb side of leeks, and the affected parts turn brown and rot. The larvae also gnaw on the fibrous roots of the leeks to make them bald. Larvae sometimes inject from the white tender stem near the ground, and then down into the bulbs. Each head or bulb often accumulates a dozen or even dozens of larvae for damage, making the leek leaves yellow, wilt, dry, and even die into a pier.
Occurrence pattern: leeks in open land in the south-central part of the province, 4-5 generations in one year, overlapping in generations, larvae dormant in 3-4 centimeters around the roots or dormant bulbs in the winter, most of the winter from late March to mid-May The larvae migrate to the surface at a depth of 1-2 cm. From early April to mid-May, they become adults and lay eggs. From April to June, they enter the stage of damage, and lightly from July to September. From late September to mid-October Seriously again.
Control methods: 1. Agricultural control. The application of planting wood ash before covering the soil can not only treat the lice but also increase the yield. After cutting the head knife or cutting two knives, the combination of water and topdressing ammonia can reduce the damage. In adulthood, adult insects were killed by stick insects. The method is to use 40 parts of polypropylene tackifier and 60 parts of motor oil to make glue. It is applied to both sides of the rubber sheet. The size of the plate can be adjusted according to the material, generally 40 centimeters and 30 centimeters is better. Insert 6-7 pieces per mu and set the height to 50-80 cm.
2. Chemical control. The critical period of prevention and control is the adult emergence and early stage of larval infestation. In adult eclosion stage, 40% chrysanthemum cream 3000 times solution, 50% phoxim 1000 times solution and 50% chlorimazine 4000 times solution can be used for spraying. Severely affected fields, after the first application, apply again at intervals of 10-15 days. In every generation of egg hatching peak, use 3% Mulel granules 4 kg per mu, mix 5-10 kg of dry fine soil, sprinkle between the rows of leeks and cover the soil, the insecticidal effect is very good. In the larvae damage period, with the method of pouring the liquid, the effect is better. Use 48% Looseben EC 200-400ml 2000x sprayer to remove the spray, then spray the liquid into the root of the leek, or 48% of the emulsion to the right amount of water Inject water into the water stream during irrigation, so that it can be poured into the root of the Chinese chive with water. This method is simple and labor-saving, but it needs to increase the dosage. It is also possible to fill the roots with 300-400 ml of 48% Dioscorerin per acre.
SINGLE ANGLE MILLING CUTTER(CARBIDE)
SINGLE ANGLE MILLING CUTTER (CARBIDE)
Material: It is made of HSSM35 material imported from Japan, high temperature quenching, hardness reaches HRC64-65, ultra-high temperature quenching, high hardness, copper key and iron key are available, good wear resistance
Production process: Using full CNC grinding machine, full grinding technology, with sharper tip and easier to cut the key. The cut key is smooth and burr-free;
Suit for machine: It is suitable for all kinds of single-head and double-head key machines. It can be used by any quality machine. It does not need to change the machine and also can process copper keys and iron keys on same key machine. No longer needs to change the cutter.
Before running the machine, it is necessary to accurately adjust the cutter to ensure the key blank and the parent key are matching, and to avoid the tool being broken due to the unstable key assembly.
The cutter is clamped on the machine and the key blank and the parent key are fixed on the clamps. Do not clamp the key blank too tight. The patent key is close to the tracer and the key blank is close to the cutter. If the key blank is not fastened, the key blank should be removed and reclamped.
When the machine is not running, clamp the cutter and cut from the left-to-right to check if the position of the parent key and the key blank are uniform. If not, re-clamp again.
Single Angle Milling Cutter,Key Milling Cutter For Furtura,Key Cutters For Ilco,Ilco Key Cutters
ZHANGJIAGANG KEYCUT CO.,LTD , https://www.keycutblade.com