There are actually no such things as weeds. When a farmer plants certain seeds which he hopes will produce a valuable crop, he calls any other plant which grows up in his field and interferes with his crop a weed!
Basically, though, weeds are plants that do harm. Some are poisonous to cattle and horses.
Others injure crops by robbing them of sunlight, soil, minerals, and water. Others act as parasites or serve as hosts to insects or plant diseases that cause harm.
Weeds are spread by various means. Some are carried from place to place in fodder, in dust, in rubbish and in manure. But most weeds that cause so much trouble do not spread because of man’s carelessness. They have their own devices for spreading their seeds.
Some weeds, such as pimpernel, nightshado, doddor and grasses, produce their seeds in such great quantities that some of them arc likely to survive practically no matter what the conditions.
Other weeds have hairlike or winglike projections on their seeds and fruits. These make it possible for the seeds to carried by the wind for considerable distances. Such weeds include dock, sorrel, thistle, and dandelion. Still, other weeds have little hooks or spines on their seeds. These hooks catch in the fur of animals or in the clothing of man, and in this way, the seeds are spread to new territory.
Some of the most successful weeds do not even spread by means of seeds. They have spreading underground stems which send up erect branches. If the underground stem is cut, these erect branches merely become separate plants.
Because of the harm they can do, weeds are fought and controlled by man. Today there is a whole variety of chemicals that have been developed to destroy weeds or prevent them from appearing.
Top Weeds Producing Countries
The following countries mainly produce weeds for CBD and spread it all over the world.
- United States