Тред №392225

Простите, но ковырятся в этом ГМО нет желания. Пропаганда на то и пропаганда, чтобы ей верили. Написали 146%, значит 146%. Как подсчитали и что с чем сравнивали, не известно.

Про снижение использования пестицидов, так это байки.
Природа не терпит пустоты, на место уничтоженных глифосатом сорняков приходят новые вредители, которых нужно уничтожать другими пестицидами. Получается удвоение.  

According to the 2010 Agricultural Chemical Use Report released in June by the US Department of Agriculture’s (USDA) National Agricultural Statistics Service (NASS), use of the herbicide glyphosate, associated with genetically modified crops, has dramatically increased over the last several years, while the use of other even more toxic chemicals such as atrazine has not declined. The data show that overall use of pesticides has remained relatively steady, while glyphosate use has skyrocketed to more than double the amount used just five years ago.
The report shows that in the states surveyed, 57 million pounds of glyphosate were applied last year on corn fields. Ten years prior, in 2000, this number was only 4.4 million pounds, and in 2005, it was still less than half of current numbers at 23 million pounds.
GM proponents claim glyphosate reduces the need for farmers to use older, more toxic herbicides such as atrazine. Also not true. In 2000, 54 million pounds of atrazine were applied across surveyed states, by 2005 57.4 million pounds were used, and in 2010, the total dipped slightly to 51 million pounds.
http://www.beyondpes…og/?p=5414



However, Professor Per Pinstrup-Andersen and his colleagues at Cornell found that all those benefits have since been largely lost due to the rise of other pests that were not considered a problem for cotton.
"Using a household survey from 2004, seven years after the initial commercialisation of Bt cotton in China, we show that total pesticide expenditure for Bt cotton farmers in China is nearly equal to that of their conventional counterparts," the scientists say in their report.
"Bt farmers in 2004 on the average have to spray pesticide 18.22 times, which is more than three times higher compared with 1999.
"Detailed information on pesticide expenditures reveals that, though Bt farmers saved 46 per cent of bollworm pesticide relative to non-Bt farmers, they spend 40 per cent more on pesticides designed to kill an emerging secondary pest," they say.
Secondary pests, such as a type of leaf bug called mirids, are not normally a problem in cotton fields because bollworm, and sprays against bollworm, tend to keep them in check.
http://www.independe…09414.html
United States Department of Agriculture researchers reported that Roundup Ready soy requires more, not less, active ingredients (a.i.) per acre than competing herbicides, many of which are designed to act at very small concentrations. Using typical U.S. tank mixes, herbicide rates on farms range from 0.84 to 2.63 kg a.i./ha for Roundup Ready soybeans versus 0.09 to 1.68 kg a.i./ha for conventional cultivars (Table 1.10; Benbrook, 2001). The net effect is that Roundup Ready soybean growers are now applying about 0.56 kg/ha more herbicide -- or nine million kg more herbicide a year in the U.S.