What are the economic importance of weed?

Answer 1

Weeds are unwanted plants in human controlled settings and as such have no value. However in the correct and controlled location they can be beneficial and do have economic value. Examples of this are..

Bashful Mimosa, it can be used as a ground cover plant between tomatoes and peppers and it has been found to have some theraputic value.

Clover, this is a high protein source of food, but is only used in survival situations. It also hosts nitrogen fixing bacteria in its roots

Cocklebur. Used in Chinese medicine and also in yellow dye.

Dandelion. attracts bees and in the ealy season, leaves and flowers are edible

Ground Ivy is high in Vitamin C and can be used in herb tea

Nettle is one of the most useful plants in herb medicine.

Vetch, useful to plant between tomatoes, or other plants that require nitrogen

Answer 2

1.Reductionof crop yields,high production cost due to control expenses,harbours pest and diseases,poisoning of animals.