1. Agricultural control. The varieties with long pods and tightly packed, such as Zhongwan No. 1, Collaborative No. 2, Purple Xiangyu and other varieties are selected.
2. Artificially catch insects. Using a plastic bag to cover the ear of the killed corn and kill it manually, it can eliminate the adults that are feeding on the ear.
3. Trapping adult worms. On or about May 25th, the fine bottle of empty bottles was hung on the trees near the corn and corn fields. The bottle height was 1 to 1.5 meters. Two to three white beetles were placed in the bottle. Adults in the field could Being trapped inside the bottle and then killing, 40 to 50 bottles per 667 square meters, the effect of catching insects is good.
4. Use sweet and sour liquid to kill insects. The use of the white-spotted beetle has a tendency towards vinegar odor, preparing sweet and sour liquid for trapping. With sugar, vinegar, wine, water and 90% trichlorfon crystals in the ratio of 3:3:1:10:0.1 in the pot and mix well, placed on the corn field, set up the same height as the position of the ear, can trap Adults.
5. Chemical control. In the early stage of corn filling, 50% phoxim EC can be used 100 times solution to drip liquid at the top of the ear of corn to prevent and control the damage of white beetle adult beetle. It can also treat corn borer and other ear pests.
28k Ultrasonic Spot Welding Machine, mainly suitable for automotive sound insulation cotton, mask ear straps, plastic parts and other products that need spot welding, its principle is that the generator generates pressure, and the transducer produces the same frequency of alternating current, converted from piezoelectric ceramics into mechanical vibration, and mechanical vibration produces thermal friction. Friction melts the contact point between the two parts, allowing the part to bond quickly.
The 28k spot welder has a wide range of applications:
Spot welding of thermoplastic thin materials: synthetic chemical fabrics, flat fabrics, knitted fabrics, nylon fabrics, non-woven fabrics, onion cloth, artificial leather, PU, sardines, PS, PVC, TR and various film covering or bonding fabrics.
Spot welding, pressure welding, riveting, marking, sealing, clothing, shoes, handicrafts etc., but also suitable for riveting and welding of auto parts such as bumpers, instrument panels, door panels, etc.
28K Ultrasonic Spot Welding Machine advantages: small size, easy to carry, easy to operate, spot welding machine beautiful appearance.
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