It is well accepted that agricultural production must be increased considerably in the foreseeable future to meet the food and feed demands of a rising human population and increasing livestock production. Crop protection plays a key role in safeguarding crop productivity against competition from weeds, animal pests, pathogens and viruses. The loss potential of these pest groups and the actual losses-i.e. losses despite the present crop protection practices-have been estimated for wheat, rice, maize, barley, potatoes, soybeans, sugar beet and cotton for the period 1996-1998 on a regional basis for 17 regions. Among crops the loss potential of pests worldwide varied from less than 50% (on barley) to more than 80% (on sugar beet and cotton). Actual losses are estimated at 26-30% for sugar beet, barley, soybean, wheat and cotton, and 35%, 39% and 40% for maize, potatoes and rice, respectively. Overall, weeds had the highest loss potential (32%) with animal pests and pathogens being less important (18% and 15%, respectively). Although viruses cause serious problems in potatoes and sugar beets in some areas, worldwide losses due to viruses averaged 6-7% on these crops and <1-3% in other crops. The efficacy of crop protection was highest in cash crops (53-68%) and lower (43-50%) in food crops. The variation coefficient of efficacy among regions was low in cash crops (12-18%) and highest in wheat (28%). As weed control can be achieved through mechanical or chemical means, worldwide efficacy in weed control (68%) was considerably higher than the control of animal pests or diseases (39% and 32%, respectively), which relies heavily on pesticides. The intensification of crop production necessary to meet the increasing demand through enhanced productivity per unit area might be impossible without a concomitant intensification of pest control. The perspectives of integrated pest management in safeguarding crop production and preventing negative effects on the environment are discussed for developing and developed countries. It is well accepted that agricultural production must be increased considerably in the foreseeable future to meet the food and feed demands of a rising human population and increasing livestock production. Crop protection plays a key role in safeguarding crop productivity against competition from weeds, animal pests, pathogens and viruses. The loss potential of these pest groups and the actual losses-i.e. losses despite the present crop protection practices-have been estimated for wheat, rice, maize, barley, potatoes, soybeans, sugar beet and cotton for the period 1996-1998 on a regional basis for 17 regions. Among crops the loss potential of pests worldwide varied from less than 50% (on barley) to more than 80% (on sugar beet and cotton). Actual losses are estimated at 26-30% for sugar beet, barley, soybean, wheat and cotton, and 35%, 39% and 40% for maize, potatoes and rice, respectively. Overall, weeds had the highest loss potential (32%) with animal pests and pathogens being less important (18% and 15%, respectively). Although viruses cause serious problems in potatoes and sugar beets in some areas, worldwide losses due to viruses averaged 6-7% on these crops and <1-3% in other crops. The efficacy of crop protection was highest in cash crops (53-68%) and lower (43-50%) in food crops. The variation coefficient of efficacy among regions was low in cash crops (12-18%) and highest in wheat (28%). As weed control can be achieved through mechanical or chemical means, worldwide efficacy in weed control (68%) was considerably higher than the control of animal pests or diseases (39% and 32%, respectively), which relies heavily on pesticides. The intensification of crop production necessary to meet the increasing demand through enhanced productivity per unit area might be impossible without a concomitant intensification of pest control. The perspectives of integrated pest management in safeguarding crop production and preventing negative effects on the environment are discussed for developing and developed countries.
Main crop of Germany was its agriculting of plants ands fruits, Also, from Coal mining and military arms manufacturing
well in the south the two main crops where cotton and tobacco
Tobacco and cotton were main crops.
The main crops in Australia are grain crops. Wheat is the main crop, while other grains such as barley, canola, sorghum and oats are also widely grown. Sugar cane, rice and cotton are other major crops.
Crops
cocoa
eggplant
what are the main crops the midwest grows
guys proabaly beer making and also steel and other metal industry's
Their main crops are sugar cane, maize and rice.
Three main crops are cotton, rice and maze.
Dhaka is a city and has no major crops.
The main crops that are grown in Africa are:Tobacco, maize, rice, and more
the 2 main cash crops were sugar and tabbaco
The main crops in our generation now is the corns, grains or what we known as palay.
The main cash crops in the Southern Colonies were rice, tobacco, and indigo.
The main crops are wheat, rice, cotton, sugarcane and seed oil.
i believe the main crops grown in nebraska was a flower called idk.XD