As GE-HT crops gained market share in 1996–2000, agricultural applications of glyphosate in the U.S. rose rapidly, reaching 36 million kg (79 million pounds) by 2000

Farmers and ranchers in the U.S. applied an estimated 0.36 million kg of active ingredient (0.8 million pounds) in 1974 (Table 1). The volume applied increased steadily, but not dramatically, through 1995, to 12.5 million kg (28 million pounds).

The EPA has not reported pesticide use data since 2007. However, NASS coverage of the major uses of glyphosate is somewhat consistent since 2007, and the U.S. Geological Survey (USGS) has also issued detailed reports and a dataset of pesticide use covering 1992-2011

“U.S. Agriculture,” “Industrial/Commercial/Government,” and “Home and Garden.”

In each year, NASS strives to collect data on states that collectively account for at least 85 % of the area planted nationally to a given crop

The U.S. Department of Agriculture (USDA), through the National Agricultural Statistics Service (NASS), has collected reasonably comprehensive pesticide use data for major grain, row crop, fruit, and vegetable crops since 1990 [18]. Periodic USDA surveys are also available to track pesticide use on major crops back into the 1970s.

(1) the percent of crop hectares treated with a given pesticide; (2) the average rate of application; (3) the average number of applications per crop year; and (4) total kilograms of pesticide applied to the crop

Agricultural Statistics Service (NASS) collected data on four different forms of glyphosate applied at different rates

This paper presents trends in glyphosate use in order to help researchers better understand and quantify the risks and benefits stemming from uses of glyphosate-based herbicides

increase glyphosate application rates and spray more often

triggered the spread of tolerant and resistant weeds

Unfortunately, all these data are rarely available

the volume sold was limited because glyphosate could only be sprayed where land managers wanted to kill all vegetation

become incorporated in the bottom sediment as well

dissolved phase in ground water after heavy rain

persist for more than a year in soils

(1) glyphosate accumulation in the environment and plant products, (2) its mode of action and effects on plants and animals, (3) its effects on microbial communities in soil, water, plants, animals and humans and (4) potential effects of shifts in microbial community composition on plant, animal and human health. An additional objective is to formulate a hypothesis about a possible relationship between resistance to glyphosate and to antibiotics in microorganisms as a result of the very high glyphosate selection pressure in the environment.

accumulation in the environment and edible products, several major concerns have arisen in recent years about harmful side effects

In 2012, about 127,000 tons of glyphosate were used in the USA and 700,000 tons worldwide

plant and animal pathogens

Although the acute toxic effects of glyphosate and AMPA on mammals are low, there are animal data raising the possibility of health effects associated with chronic, ultra-low doses related to accumulation of these compounds in the environment.

In 2015, the World Health Organization reclassified glyphosate as probably carcinogenic to humans

minimizing non-target exposure to glyphosate by limiting the rates of glyphosate used,(2)enhancing micronutrient sufficiency to maintain optimum plant physiological function and resistance,(3)detoxifying accumulated glyphosate in root tips and other meristematic tissues to restore growth potential, and(4)moderating glyphosate toxicity to rhizosphere microbes or restoring critical microbial components damaged by glyphosate released in root exudates.

sometimes appear a year after exposure and persist for two or more years

herbicide-resistant crops

This new trend in agriculture has increased the usage and intensity of specific herbicides while limiting genetic diversity in the specific crops that have been genetically modified

the most prudent method to reduce the detrimental effects of glyphosate on GR crops will be to use this herbicide in as small a dose as practically needed.

ameliorate

glyphosate-induced weakening of plant defenses and increased pathogen population and virulence

xtensive unintended effects on nutrient efficiency and disease severity, thereby threatening its agricultural sustainability

highly effective weed control, simplified management decisions, and given cleaner harvested products.