Taking greenhouses, small arch sheds and mulching film to cover watermelons, due to the temperature and humidity conditions in the protected area, suitable for weed growth, and the inconvenience of manual weeding, resulting in strong weed growth and serious damage. There are few herbicide products registered in watermelon fields in China, and many farmers use herbicides in watermelon fields, resulting in poor herbicidal effects and even phytotoxicity.
Herbicides that can be used in watermelon fields, in addition to the registered herbicides such as diquat, metolachlor, zhongdingling, quizalofop, and high-efficiency flupirtine, other amides such as amides Acetone, diphenyl ether oxyfluorfen, dinitroaniline pendimethalin, cyclic imine grasses, triazines, carbamate, carbamate The phenoxy-based flupirin and other materials have been introduced for weeding in watermelon fields. Among them, butachlor has become the first choice for weeding in most watermelon fields because of its relatively broad herbicidal spectrum, high safety and low cost.
The cause of herbicide phytotoxicity is that the product is improperly selected. Some herbicides registered in crop fields such as soybeans, peanuts, cotton, etc., some should not be used in watermelon fields, especially acetochlor, which is sensitive to watermelon. After application, the growth is inhibited, and the dead seedlings are reduced. Serious or even unacceptable. Second, heat damage will aggravate the phytotoxicity. Watermelons in greenhouses and small arches are prone to heat damage due to steep temperature rise and decidua. In this case, if a highly volatile herbicide is used, it is easy to cause excessive concentration of drugs in the air to cause phytotoxicity, which is serious. Third, the melon field is not well drained. There is more rain in the growing season of watermelon, and the activity of metformin and other drugs in the case of soil waterlogging is greatly improved, and the safety is drastically reduced, which is easy to cause phytotoxicity. In addition, in sandy soils and soils with low organic matter content, some herbicides are easily infiltrated by rain, which in turn causes phytotoxicity to watermelon.
Herbicide use technical points to select herbicides registered on watermelon, and strictly follow the instructions for use. At the same time, appropriate agents should be selected according to different cultivation methods and the occurrence of weed population. Watermelon blocking treatment of soil-based herbicidal, typically before or after sowing before transplanting administration; pesticide-treated leaf should use postemergence control grassy weeds, such as quizalofop, efficient flupirtine A Haloxyfop Wait. In areas with high rainfall or poorly drained fields, metformin and other drugs are recommended to use low amounts. Due to the high temperature of the watermelon field in the greenhouse and small arch shed, the liquid is easy to volatilize. It is necessary to smear the film in time and ventilate in time to avoid the high temperature in the shed to cause phytotoxicity. The dosage should be used to ensure safety. Membrane watermelons are generally limited to spraying on the cover film rather than on the whole field.
Cordless Reciprocating Saw Sabre Saw
The 20V Cordless Reciprocating Saw Saber Saw is used to cut tree and metal tube, with cutting capacity: 100mm for wood and 8mm for soft steel.
The Cordless Saber Saw is also can be used to cut meat with Stainless Steel Blade.
The Cordless Reciprocating Saw is convenient to use at anywhere, wireless power supply, 2Ah and 4Ah Battery is rechargeable.
The Cordless Reciprocating Saw Vibration is small when cutting the wood, work with 0-2900 rpm speed, 28mm stroke length.
The Cordless Tree Cutting Power Tool with a aluminum gear box, not plastic one, for better product performance.
The Cordless Reciprocating Saw with Quick Release Chuck, for easy blade change.
BTW, the pivoting shoe is adjustable.
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