The crop use can be overstate as well. Of the 890 million acres of U.S. crop destroy, only 17 percent is treated with herbicides, 6 percent with insecticides, and 0.9 percent with fungicides. These figures include land used as pastures, and if this land is removed from the picture, the results are 34 percent treated with herbicides, 12 percent with insecticides, and 2 percent with fungicides, still not a vast proportion of the land. For each one crop, insecticide treatment may vary by geographic area, according to perceived need in assorted places. In the mountain region where large quantities of potatoes are grown, 65 percent of the potato land area is treated with insecticides; in the southeastern unite States where early potatoes are grown, 100 percent of the potato acreage is treated. The difference probably reflects the higher intens
Weeds are also a caper, as noted, and they guide to be a more consistent and predictable problem than either disease or pests. Weeds compete with crops for water, nutrients, and light, and they read problems in harvesting and, for many seed crops, cleaning. A Canadian survey showeed that 224 weeds present per square yard of cereal grass caused an estimated yield loss of 15 percent (McEwen, 774).
McEwen, F.L., "Food Production--The contend for Pesticides," Bioscience (December 1978), 773-777./
A number of amendments were offered to these bills to try to make their nutrition more stringent or to water them down, depending on the beginning of the amendment.
One such offering would have stopped national buy-ups of unsafe pesticides and would have changed the law under which pesticides are authorize by the EPA. The law that this amendment would have rescinded required the EPA to buy masking from manufacturers, distributors, and even farmers the unused stocks of pesticides that the EPA found unsafe and had removed from the marekt. much(prenominal) buybacks have been costly, and in recent years they have interpreted a large chunk out of the funds unattached to the EPA for regulatory activities (Davis, June 25, 1988, 1750).
Also noted are alternative, nonchemical pest controls that rough believe could be effective in peremptory these problems. These methods are seen as highly effective and important in menses agricultural practice, and they are in fact employed already more extensively than pesticides for pest control in the United States. Crop rotation methods have been successful in controlling corn rootworms on about 60 percent of U.S. corn acreage. Farmers, however, have to consider other issues than rootworm control when deciding to revolve corn with other crops. Among the other issues involved are telling crop prices, crop management practices that are appropriate for a particular type of farm, soil fertility, and other prevalent crop disease and weed problems. We can as
Order your essay at Orderessay and get a 100% original and high-quality custom paper within the required time frame.
No comments:
Post a Comment