“Look! This is a grasshopper just bought. It took less than two days to disperse. It was all old straw.†Looking at the grasshopper in front of him, Master Zhang Qinghai of Shouguang City’s Luocheng Street looked helpless.
This is a problem that many vegetable farmers will face when they purchase grasshoppers. How can they choose high quality grasshoppers?
First of all, look inside the mixed old straw. Seasonal straws are of good quality, strong insulation, and long service life. When you buy, you can open the grass and look at the color of the straw. It's white and green. If it's black, yellow, you have to buy it carefully.
Second, look at the line. The toughness of the line is a prerequisite for ensuring that the grasshoppers do not fall apart. If its toughness is poor, especially in the case of using a roller shutter to pull straw, it is easy to break the line, break the ring, and the useful life is significantly reduced. Generally, the cooked silk nylon rope has soft hand feeling, high toughness, high brightness, and it is not easy to puncture when playing the thread. The straw curtain played with the ripe silk is strong and firm. When buying haystacks, we must also look at whether there are locks on both sides to avoid loosening.
Again, look at the weight. The weight of the straw curtain determines the heat insulation and wind resistance ability of the straw curtain to a certain extent. The straw curtain with a width of 3 meters is generally suitable for maintaining a weight of 22-25 pounds per meter, but also has a custom thickening of about 28 pounds. /Meter. That is to say, the current straw screen is about 340 pounds. The vegetable grower can call it when ordering.
In addition, it is mostly roller blinds that pull grass weeds. When buying grass weeds, we must pay attention to how many warp threads it has. We must use at least 24 warp weaving curtains. The distance between the two warp threads is about 14 cm to guarantee the quality of straw curtains. Reliable and long service life. And the warp of the outermost edge of both sides should not be too close to the inside of the straw to avoid scratching the film.
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