As the temperature rises, the larvae of the ladybug will damage the eggplant and the potato; the leafhopper will suck the juice on the back of the eggplant leaves, making the leaves appear red; the aphids, cabbage caterpillars, diamondback moth, cotton bollworm, tobacco budworm and other pests continue It is harmful on a variety of crops. It is necessary to take time to prevent and control these pests. Open field cucumber is prone to downy mildew, anthracnose, bacterial angular leaf spot, root knot nematode, etc. Tomato is prone to early blight, late blight, viral disease, spot blotch, etc. Pepper is prone to viral diseases and diseases, etc. It is prone to anthrax and viral diseases. For these diseases that occur every year, prevention and control should be strengthened. For melon downy mildew, powdery mildew, anthracnose should be sprayed 50% Anke 7 days to 10 days before the onset, 43% good Lectra and 53.8% can kill 2000, or 50% chlorothalonil, 70% Bay, etc.; spray on 72% Best or Anke + Dasheng m45 on cotton plague, early and late blight, leaf spot disease of the solanaceous fruit, and alternately apply several pesticides to improve the efficacy, and join Yunda-120 relief The phytotoxicity improves the control effect and regulates the growth. For aphids, whitefly, whitefly, red spider, spray 10% or 3% acetamiprid or 5% flat mites, spray 4.5% 8% or 0.8% for cabbage caterpillar, heartworm, and cotton bollworm Biological pesticides . Watermelon blight: 1000 times with 40% pentachloronitro-wettable powder or 600 times with 40% melon-dried. Watermelon blight, powdery mildew: spray with 1500 times 10% or 40% DuPont Fuxing 5000 to 6000 times or 4000 times. Watermelon blight: spray with 600% antivirus 矾 600 times or 70% ethyl phosphorus manganese zinc 400-600 times. Watermelon leaf miner, Liriomyza huidobrensis: spray with 3000 to 5000 times or 1% insecticidal 1000 to 1500 times. Aphids, thrips: spray with Emerald 25,000 to 30,000 times or 20% Confort 5000 times. Tomato late blight: spray with 600% antivirus cockroach 600 times or 70% ethylphosphonium aluminum manganese zinc 400-600 times. Cucumber, long melon powdery mildew: sprayed with DuPont Fuxing 5000-6000 times. Plutella xylostella: It can be sprayed with 1% insecticidal 1000-1500 times or 5% Regent 1500 times.
Non-tapping screws are machine Screw, the pieceworker to be fastened must be tapped with taps in the screw hole in advance to match the screw threads.
The difference between tooth screws and other screws depends on whether they can be used together with nuts. Tooth screws can be used with nuts. And relative to the screws of other teeth, there are self-tapping screws. The nut of this kind of screw has no bow teeth. As for the standard teeth and fine teeth are only different pitch, it is the nut of the machine screw
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