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Herbicide Tolerant (HT) / Genetically modified Crops

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1. Crops that are normally susceptible to herbicides can be made into herbicide tolerant crops by employing biotechnological tools. Resistance genes for several herbicides have been incorporated into the genome of corn, cotton, canola and soybean.

2. USDA survey data revealed HT soybeans went from 17 percent of U.S. soybean acreage in 1997 to 68 percent in 2001 and 91 percent in 2009. Plantings of HT cotton expanded from about 10 percent of U.S. acreage in 1997 to 56 percent in 2001 and 71 percent in 2009. The adoption of HT corn, which had been slower in previous years, has accelerated, reaching 68 percent of U.S. corn acreage in 2009.

3. Introducing HT crops help in efficient management of weeds, especially problem weeds with minimum risk to the crop. The technology will be very useful in agriculture even for small/marginal farmers, especially in adopting conservation tillage which helps in preventing soil erosion and reduces turnaround time between harvesting to planting of next crops. The ability of crops to tolerate broad spectrum herbicides such as Glyphosate will help in achieving effective weed control.

File Courtesy: 
Weed Management in Rice, DRR Training Manual
Related Terms: EISWeed Management
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