Beijing time on August 4, according tomedia reports, with the arrival of the rainy season, in addition to the cool breeze, as well as a large area of gray clouds, there are some unpopular “guests”, including snails and slugs (also known as slugs). These two little things are the nightmares of every gardener who crawls around the plants, chewing on the leaves and roots of the plants. Despite their small size, they have a greedy appetite and can eat food that weighs up to several times their weight every day.
Snails and crickets.
What’s the difference between a snail and a slug? Both belong to the mollusc door, the abdominal foot outline. The name “abdominal foot” can simply sum up their biological structure. Their long, sticky bodies cling to the ground, the equivalent of “abdominal foot”, sliding forward through the muscle-building “foot”. This muscle keeps secreting mucus, making it easier for the body to slide. When the mucus is dry, it leaves a silvery mark, indicating that the two pests have just recently appeared. Mucus prevents the surrounding dry soil from draining moisture from their body cells, and prevents their bodies from being scratched by sharp objects in the soil. The only difference between snails and slugs is that slugs don’t have their own “home”.
Unlike snails, there is no shell on the back of the dragonfly. This is beneficial to slugs because they can drill into a narrower space, but they also make them more vulnerable to the surrounding environment.
Sprinkle salt attack!
Salt is the primary killer against abdominal-footed organisms and can effectively prevent them from destroying plants. The “foot” of snails and crickets are made up of cells. The inside of the cell contains a variety of organelles, wrapped in a layer of water-based media, the outermost layer is a layer of cell membrane. Cell membranes are semi-permeable membranes made up of two layers of phospholipid molecules, which can pass easily and large molecules are blocked out. Since the cell membrane is a semi-permeable membrane, solvent molecules penetrate from the side of the higher concentration to the lower side. Differences in the concentration of substances on both sides of the cell membrane cause osmotic pressure. Due to the presence of osmotic pressure, the soluble molecule moves from one side of the cell membrane to the other.
Pictured is the movement of the solvent molecule (water) through the semipermeable membrane.
Animal cells are not entirely water-rich and contain several ions, such as sodium and chloride ions contained in ordinary salts. If salt is sprinkled on snails and moths, salt crystals bind to moisture on their skin, creating a high concentration of sodium chloride solution, which produces osmosis pressure inside and outside the cell. A high concentration of salt solution is also called a high-permeable solution. If animal cells are placed in a high-permeable solution, the cells will shrink due to a large amount of water loss. Water quickly seeps out of the cells, diluting the salt solution outside the cell. When the salt concentration on both sides of the cell membrane is balanced, the water molecules stop moving. So aquatic snails and slugs can survive in salt water because the salt concentration inside their cells is the same as the outside world.
Pictured is the effect of the concentration of the surrounding medium on the cells.
But lusheng snails and slugs are not so lucky. Water loss causes them to secrete mucus and prevents the skin from drying out. As their bodies shrink, the body’s gas is released outwards, creating many foams. If you sprinkle enough salt, snails and slugs can easily die from dehydration. As you can imagine, this is an extremely painful process.
The best armor that nature has given.
Water accounts for about 55% to 60% of the total body composition of adults. Imagine what it would be like if you lost half of your body’s water in just a few minutes. Unlike snails or slugs, human skin is thicker and more functional, a set of perfect armor that nature has given us. The outermost epidermis maintains osmotic pressure and prevents a large amount of water and heat loss. Snails and slugs do not enjoy this benefit. However, if you’ve ever accidentally put salt on your wound, you’ll appreciate the pain that snails and slugs have experienced.
As organisms evolve, their skin becomes more advanced at the biological level. Thanks to our skin, we don’t have to hesitate to grab a handy of salt. But for belly-footed creatures such as snails and slugs, the force of penetration is undoubtedly much more powerful and deadly. While every horticultural enthusiast wants snails and slugs to stay away from their beloved plants, salting may not be human enough. A study conducted by the University of Natural Resources and Life Sciences in Vienna has shown that radon can be better addressed.
The dragonfly is a good friend of gardeners. Not only do they improve soil fertility, but they also reduce the damage done to plants by 60%. If the nitrogen content in the soil is increased by 18%, the plant’s ability to protect itself will be greatly enhanced. Since there is no peaceful coexistence, snails and slugs will naturally move elsewhere. (Leaf)