Rice field pests and diseases are concentrated and small in area, which is an excellent period for pest control. The pests in Putian in our area mainly include Laodelphax striatellus, aphids, rice locusts, black streaked dwarf disease, and stripe leaf blight. This year there are still rice virus disease epidemic may still be the focus of prevention and control of seedling; borers clear upward trend, we must attach great importance. Always around the publicity and technical guidance, earnestly carry out comprehensive control measures of pests such as small brown planthopper in rice seedling, rice production safety safeguards.
First, the trend of pests and diseases in Putian
　　 1. The generation of rice virus disease in the wheat field is a light trend. According to the surveys and surveys in mid- May , the density of the first generation of gray planthoppers is only 1-2 heads / foot- 2 , which is the lowest number of insects in the same period of the past decade. However, as the wheat was harvested, the gray planthoppers moved to Putian. Considering that there are many hostes of Laodelphax striatellus, there are many insect sources in Putian, and rice virus disease still has certain threats to rice. All localities must overcome the thoughts of light enemy paralysis, seize the critical period, and comprehensively control drugs.
　　 2 . The locusts and the mites have fallen back. According to the end of March peel pile of rice investigation, after winter worm amount of base acres were 220 and 310, compared with the similar period last year. The stripping of the three mites and the light were not seen, showing a light trend.
In addition, rice glutinous horses, rice weevil, etc. are also common pests in Putian, so we must pay attention to good governance.
Second, prevention and treatment opinions
　　 1. Guiding ideology: The main attack is ash, and other pests such as rice weevil, rice locust, aphid, etc., are used to treat diseases.
　　 2 , prevention time and frequency.
The first master time after administration before May 30, or Transplanting, throwing, dry seedbed after removing film (or nonwoven fabric) 1 day medication; second time 1-2 days before transplanting. Putian covered with insect-proof nets will cover the insect-proof net immediately after uncovering the film (or non-woven fabric), and only need to get a get-up medicine 1-2 days before transplanting .
　　 3 , unified pharmaceutical formula.
Controlling the gray planthopper: 30% pyr in the mu ? Isopropyl Granville WP 30 g watered 40 kg spray or small backpack is watered 20 kg Mist Sprayer Mist. The weeds on the edge of the fields around Putian should also be sprayed, and at the same time kill the gray locusts on the weeds.
Control borers: 1-2 days before transplanting Kang Mu 20% or 48% width of 5 ml 90 ml of look green.
Third, matters needing attention
　　 1. Green is highly toxic to fish, and safety protection should be done to prevent the flow of water into the fish pond.
　　 2 , emphasize the use of drugs according to the formula to ensure the control effect.
　　 3 , live seeding rice fields should be promptly used to control a gray planthopper after sowing and emergence.
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Self tapping screw
Self tapping Screw is one of the threaded fasteners in the pre drilling of metal or non-metallic materials. Self tapping screws are used for the connection between thin metal plates (steel plates, sawing plates, etc.). When connecting to the connecting piece for the threaded hole, then self tapping screw into the threaded hole of the connecting piece.
Description of self tapping screw:
Standard: DIN,ASTM/ANSI JIS EN ISO,AS,GB
Material: Carbon steel:1010,1022;
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Finishing: Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG) phosphorization,Black
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