Cultivation ,
Pennsylvania Tobacco is cultivated similarly to other agricultural products.
Seeds were at first quickly scattered onto the soil. However, young plants came under increasing attack from
flea beetles (
Epitrix cucumeris or
E. pubescens), which caused destruction of half the tobacco crops in United States in 1876. By 1890, successful experiments were conducted that placed the plant in a frame covered by thin cotton fabric. Modern tobacco seeds are sown in
cold frames or hotbeds, as their
germination is activated by light. In the United States, tobacco is often fertilized with the mineral
apatite, which partially starves the plant of
nitrogen, to produce a more desired flavor. After the plants are about tall, they are transplanted into the fields. Farmers used to have to wait for rainy weather to plant. A hole is created in the tilled earth with a tobacco peg, either a curved wooden tool or deer antler. After making two holes to the right and left, the planter would move forward two feet, select plants from his/her bag, and repeat. Various mechanical tobacco planters like Bemis, New Idea Setter, and New Holland
Transplanter were invented in the late 19th and 20th centuries to automate the process: making the hole, watering it, guiding the plant in—all in one motion. Tobacco is cultivated annually, and can be
harvested in several ways. In the oldest method, still used, the entire plant is harvested at once by cutting off the stalk at the ground with a tobacco knife; it is then speared onto sticks, four to six plants a stick, and hung in a curing barn. In the 19th century, bright tobacco began to be harvested by pulling individual leaves off the stalk as they ripened. The leaves ripen from the ground upwards, so a field of tobacco harvested in this manner entails the serial harvest of a number of "primings", beginning with the
volado leaves near the ground, working to the
seco leaves in the middle of the plant, and finishing with the potent
ligero leaves at the top. Before harvesting, the crop must be
topped when the pink flowers develop. Topping always refers to the removal of the tobacco flower before the leaves are systematically harvested. As the industrial revolution took hold, the harvesting wagons which were used to transport leaves were equipped with man-powered stringers, an apparatus that used twine to attach leaves to a pole. In modern times, large fields are harvested mechanically, although topping the flower and in some cases the plucking of immature leaves is still done by hand. In the U.S.,
North Carolina and
Kentucky are the leaders in tobacco production, followed by
Tennessee,
Virginia,
Georgia,
South Carolina and
Pennsylvania.
Curing used for air curing of shade tobacco ,
Iran Curing and subsequent aging allow for the slow
oxidation and degradation of
carotenoids in tobacco leaf. This produces certain compounds in the tobacco leaves and gives a sweet hay,
tea,
rose oil, or fruity aromatic flavor that contributes to the "smoothness" of the smoke. Starch is converted to sugar, which
glycates protein, which is oxidized into
advanced glycation endproducts (AGEs), a
caramelization process that also adds flavor. Inhalation of these AGEs in tobacco smoke contributes to
atherosclerosis and
cancer. Levels of AGEs are dependent on the curing method used. Tobacco can be cured through several methods, including: •
Air-cured tobacco is hung in well-ventilated barns and allowed to dry over a period of four to eight weeks. Air-cured tobacco is low in sugar, which gives the tobacco smoke a light, mild flavor, and high in nicotine. Cigar and burley tobaccos are 'dark' air-cured. •
Fire-cured tobacco is hung in large barns where fires of hardwoods are kept on continuous or intermittent low smoulder, and takes between three days and ten weeks, depending on the process and the tobacco. Fire curing produces a tobacco low in sugar and high in nicotine. Pipe tobacco, chewing tobacco, and snuff are fire-cured. •
Flue-cured tobacco was originally strung onto tobacco sticks, which were hung from tier poles in curing barns (Aus:
kilns, also traditionally called 'oasts'). These barns have flues run from externally fed fire boxes, heat-curing the tobacco without exposing it to smoke, slowly raising the temperature over the course of the curing. The process generally takes about a week. This method produces cigarette tobacco that is high in sugar and has medium to high levels of nicotine. Most cigarettes incorporate flue-cured tobacco, which produces a milder, more inhalable smoke. It is estimated that 1 tree is cut to flue-cure every 300 cigarettes, resulting in serious environmental consequences. According to the
Food and Agriculture Organization (FAO) of the United Nations, tobacco leaf production was expected to hit 7.1 million tons by 2010. This number is a bit lower than the record-high production of 1992, when 7.5 million tons of leaf were produced. The production growth was almost entirely due to increased productivity by developing nations, where production increased by 128%. During that same time, production in developed countries actually decreased. it has still led to local Chinese cigarettes being preferred over foreign cigarettes because of their lower cost.
Major producers Every year, about 5.9 million tons of tobacco are produced. Top producers are China (36.3%), India (12.9%), Brazil (11.9%) and Zimbabwe (3.5%). As noted above, despite the income generated for the state by profits from state-owned tobacco companies and the taxes paid by companies and retailers, China's government has acted to reduce tobacco use.
India India's Tobacco Board is headquartered in
Guntur in the state of
Andhra Pradesh. India has 96,865 registered tobacco farmers and many more who are not registered. In 2010, 3,120 tobacco product manufacturing facilities were operating in all of India. Around 0.25% of India's cultivated land is used for tobacco production. In the southern regions of Brazil, Virginia, and Amarelinho, flue-cured tobacco, as well as burley and Galpão Comum air-cured tobacco, are produced. These types of tobacco are used for cigarettes. In the northeast, darker, air- and sun-cured tobacco is grown. These types of tobacco are used for cigars, twists, and dark cigarettes.
Lebanon Although only being the 35th biggest tobacco producer in 2023, the crop plays an important role in parts of
Lebanon. The cultivation of tobacco in Lebanon dates back to the 17th century and today the crop is grown by all religious sects. The role of tobacco in the region is twofold. On the one hand, it is called the "crop of resistance" as it allows the population to navigate the consequences of a decades-long violent conflict and a certain degree of detachment, making it a symbol of hope, resistance, and resilience. The tobacco industry houses some of these working children. Use of children is widespread on farms in Brazil, China, India, Indonesia, Malawi, and Zimbabwe. While some of these children work with their families on small, family-owned farms, others work on large plantations. In late 2009, reports were released by the London-based human-rights group
Plan International, claiming that child labor was common on Malawi (producer of 1.8% of the world's tobacco They also reported experiencing
green tobacco sickness, a form of nicotine poisoning. When wet leaves are handled, nicotine from the leaves gets absorbed in the skin and causes nausea, vomiting, and dizziness. Children were exposed to levels of nicotine equivalent to smoking 50 cigarettes, just through direct contact with tobacco leaves.
Economy , Cuba Major tobacco companies have encouraged global tobacco production.
Philip Morris,
British American Tobacco, and
Japan Tobacco each own or lease tobacco-manufacturing facilities in at least 50 countries and buy crude tobacco leaf from at least 12 more countries. This encouragement, along with government subsidies, has led to a glut in the tobacco market. This surplus has resulted in lower prices, which are devastating to small-scale tobacco farmers. According to the World Bank, between 1985 and 2000, the inflation-adjusted price of tobacco dropped 37%. Tobacco is the most widely
smuggled legal product.
Environment Tobacco production requires the use of large amounts of
pesticides. Tobacco companies recommend up to 16 separate applications of pesticides just in the period between planting the seeds in greenhouses and transplanting the young plants to the field. Pesticide use has been worsened by the desire to produce larger crops in less time because of the decreasing market value of tobacco. Pesticides often harm tobacco farmers because they are unaware of the health effects and the proper safety protocol for working with pesticides. These pesticides, as well as fertilizers, end up in the soil, waterways, and the food chain. Coupled with child labor, pesticides pose an even greater threat. Early exposure to pesticides may increase a child's lifelong cancer risk, as well as harm their nervous and immune systems. As with all crops, tobacco crops extract nutrients (such as
phosphorus,
nitrogen, and
potassium) from soil, decreasing its fertility. Furthermore, the wood used to cure tobacco in some places leads to deforestation. While some big tobacco producers such as China and the United States have access to petroleum, coal, and natural gas, which can be used as alternatives to wood, most developing countries still rely on wood in the curing process.
Research Several tobacco plants have been used as
model organisms in
genetics.
Tobacco BY-2 cells, derived from
N. tabacum cultivar 'Bright Yellow-2', are among the most important research tools in plant
cytology. Tobacco has played a pioneering role in
callus culture research and the elucidation of the mechanism by which
kinetin works, laying the groundwork for modern agricultural
biotechnology. The first genetically modified plant was produced in 1982, using
Agrobacterium tumefaciens to create an antibiotic-resistant tobacco plant. This research laid the groundwork for all
genetically modified crops.
Genetic modification Because of its importance as a research tool, transgenic tobacco was the first genetically modified (GM) crop to be tested in field trials, in the United States and France in 1986; China became the first country in the world to approve commercial planting of a GM crop in 1993, which was tobacco.
Field trials Many varieties of transgenic tobacco have been intensively tested in field trials. Agronomic traits such as resistance to pathogens (viruses, particularly to the
tobacco mosaic virus (TMV); fungi; bacteria and nematodes); weed management via herbicide tolerance; resistance against insect pests; resistance to drought and cold; and production of useful products such as pharmaceuticals; and use of GM plants for
bioremediation, have all been tested in over 400 field trials using tobacco.
Production Currently, only the US is producing GM tobacco. From 2002 to 2010, cigarettes made with GM tobacco with reduced nicotine content were available in the US under the market name Quest. ==Consumption==