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Herbicides
What is herbicide ?
Herbicides are a broad class of pesticides that are used to remove nuisance plants, such as grasses and weeds, that may compromise the growth and yield of desired crops that are in close proximity.
Herbicides are used in agricultural and wildland ecosystems to reduce the density of weeds and promote the growth of desirable species. Use of herbicides in agroecosystems may change composition of weed populations.Buy cheap price herbicide online in india on Krisikart .
Types of Herbicides
Herbicides in this category can be divided into two groups:
1.contact herbicides
2.systemic herbicides,
according to their translocation characteristics in plants .
Contact herbicides affect only the part of the plant that they touch. Absorption through foliage is minimal. The application, therefore, must be made in sufficient quantity to cover the foliage thoroughly.
systemic herbicides can be translocated to other parts of the plant. They alter the normal biological function of the plant by interfering with certain biochemical reactions. Thus, when applied to foliage or soil, they enter the plant and translocate to their site of action.Buy cheap price herbicide online in india on Krisikart .
Use of Herbicides
Systemic herbicides are absorbed and transported through the plant’s vascular system, killing the entire plant. Contact herbicides kill the part of the plant in contact with the chemical but the roots may survive and the plant may regrow. Buy cheap price herbicide online in india on Krisikart .
Broad spectrum (non-selective) herbicides will kill most plants they encounter. Selective herbicides will affect only some plants, often broad-leaf or dicot plants such as Eurasian water milfoil.
Herbicides are either contact herbicides that rapidly kill plant tissues to which they are applied or systemic herbicides that are taken up and transported to parts of the plant to which they were not applied, generally acting more slowly and more completely on the plant than contact herbicides. Other herbicides work best applied directly to plant
