Current vegetable pest control points

1. Main diseases: Recently, there are mainly vegetable virus diseases, cucumber bacterial angular spot disease, cowpea rust, and coal mold disease. In the field, a variety of vegetables such as pepper and cucumber were infected with viral diseases. The rate of diseased fields was 30-80%, and the rate of diseased plants in some fields was 100%. The rate of bacterial bacterial leaf spot disease in cucumbers was 30-100%. Cowpea rust and coal mold The morbidity rate is 30%.
2, the main pests. Recently, the most important effects on vegetables include Bean Bean, Melon, Spodoptera, Aphid, Red Spider, Puma, and 28-star ladybug. In the field, the rate of soybean field worms was 80-100%, the rate of pod damage was 26.4%, and the number of serious fields was over 80%. The amount of worms on cucumber is 36.7-252, and the number of eggs in 28-star ladybug is 167.2.
3, comprehensive prevention measures: the use of sterilization, killing, virus A and other agents to prevent a variety of diseases, the choice of Kono BT plus work, avermectin, lesburn, four seasons red, etc. to control a variety of pests.
4, prevention and treatment methods 1 adhere to before 10 o'clock in the morning, after 5 pm application; 2 using "snow cover top" spray, must spray 2-3 barrels of water per acre; 3 within 4 hours after application of the rain to be applied.

Ball Valves

There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.

In addition, there are different styles related to the bore of the ball mechanism itself.

Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.

Stainless Steel Ball Valves, Brass Ball Valves, Sanitary Ball Valves, Water Ball Valves

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