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The use of herbicides as a chemical weapon by the U.S. military during the Vietnam War has left tangible, long-term impacts upon the Vietnamese people and U.S soldiers that handled the chemicals. [37] [38] More than 20% of South Vietnam's forests and 3.2% of its cultivated land were sprayed at least once between during the war. [39]
Trunk injection or endotherapy also known as vegetative endotherapy, [1] [2] [3] is a method of target-precise application of pesticides, [4] [5] [6] plant resistance activators, [7] or fertilizers [8] into the xylem vascular tissue of a tree with the purpose of protecting the tree from pests, or to inject nutrients to correct for nutrient deficiencies.
Phytoncides are antimicrobial allelochemic [dubious – discuss] volatile organic compounds derived from plants.The word, which means "exterminated by the plant" [citation needed] (from the Greek φυτόν "plant" and the Latin caedere "to kill"), was coined in 1928 by Boris P. Tokin, a Soviet biochemist then studying at Moscow State University. [1]
This chemical compound is a chlorinated derivative of o-anisic acid. [5] It has been described as a "widely used, low-cost, environmentally friendly herbicide that does not persist in soils and shows little or no toxicity to wildlife and humans." [6] Despite its success in improving crop yields, dicamba has attracted controversy.
2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.
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