Prevention and control of legume pests and diseases

First, the disease (1) rust: use 15% powder rust spirit wettable powder 800-1000 times liquid, 70% mancozeb wettable powder 500 times liquid, 50% methyl thiophanate 600-800 times liquid, 50% Spraying prevention and control of carbendazim WP 500 times solution, spray once every 15 days, even spray 2-3 times. (2) Viral disease: prevention is the main focus, and it is important to prevent and control aphids. It can be sprayed with a virus a wettable powder 500 times solution and a 1:100-150 raw soybean spray spray spray, once every 10 days, even spraying 3-4 times. (3) Fusarium wilt: Roots with 10% double-effect water-repellent 200 times solution, 50% carbendazim 500 times solution, 50% methyl thiophanate 400 times solution, 200 ml per strain, once every 10 days, continuous 2 to 3 times. (4) Anthrax: spray treatment with 50% methyl thiophanate 600-800 times solution, 50% carbendazim 600 times solution, 50% methyl thiophanate 700 times solution and 75% chlorothalonil 700 times solution. Spray once every 7-10 days, even spray 2-3 times. (5) Powdery mildew: spray with 50% carbendazim suspension 600 times solution, 15% powder rust 1500 times solution, spray once every 7-10 days, even spray 2-3 times. (6) Bacterial disease: 14% solution of lycopene copper water 300 times, 72% agricultural streptomycin 3000-4000 times liquid spray control, spray once every 7-10 days, even spray 2-3 times. Second, pests (1) pea pods: 20% fast killing cock or 2.5% enemy kill emulsifiable 2000-3000 times liquid, 2.5% kungfu emulsifiable 3000-4000 times liquid spray control. (2) Soybean meal: 50% sputum mist 2000-3000 times liquid, 40% elegan emulsifiable oil 600-1000 times liquid, 50% anti-Poly 2000-3000 times liquid, etc. for spraying prevention. (3) Leafhopper: 73% gram of emulsifiable concentrate 2000 times liquid spray control. (4) Beaver mites: spray with 40% dimethoate 600-1000 times solution, 20% daisy emulsifiable concentrate 1000-2000 times solution, 2.5% Uranus emulsifiable concentrate 3000 times solution, etc. (5) Whitefly mites: 2.5% enemy killing emulsifiable concentrate 2000-3000 times liquid, 10% phlegm emulsifiable concentrate or 25% cockroach emulsifiable concentrate 1000 times liquid spray control. (6) Underground pests (small tiger, scorpion, scorpion, golden worm): roots are 1500-2000 times with 50% phoxim emulsifiable concentrate or 600-1000 times with trichlorfon crystals.

Tapping Screw

Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.

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