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Bt Plant-Incorporated Protectants October 15, 2001 Biopesticides Registration Action Document

counties of Dinwiddie, Franklin City, Greensville, Isle of Wight, Northampton, Southampton, Suffolk City, Surrey, Sussex) and Missouri (only the counties of Dunkin, New Madrid, Pemiscot, Scott, Stoddard). The correct list of counties must be in the 2003 grower guide and may be provided as a supplement for the 2002 growing season.

b. Sweet Corn Post-Harvest Requirements

Sweet corn is harvested long before field corn. Therefore, if the sweet corn stalks remaining in the field and any insects remaining in the stalks are destroyed shortly after harvest, a refuge is not needed as a part of the IRM program for sweet corn. Growers must adhere to the following types of crop destruction requirements as described in the grower guide/product use guide and/or in supplements to the grower guide/product use guide.

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Crop destruction must occur no later than 30 days following harvest, but preferably within 14 days. The allowed crops destruction methods are: rotary, mowing, discing, or plow-down. Crop destruction methods should destroy any surviving resistant insects.

ii. Bt Cotton

The Agency has determined that the unrestricted use of Cry1Ac as expressed in cotton is likely to lead to the emergence of resistance in one or more of the target insect pests unless measures are used to delay or halt the development of resistant insects. EPA is requiring the registrant to implement an Insect Resistance Management (IRM) program to mitigate the possibility that pest resistance will occur. The required IRM program for Bt cotton has the following elements:

1] Requirements relating to creation of a non-Bt cotton refuge in conjunction with the planting of any acreage of Bt cotton;

2] Requirements for the registrant to prepare and require Bt cotton users to sign “grower agreements” which impose binding contractual obligations on the grower to comply with the refuge requirements;

3] Requirements for the registrant to develop, implement, and report to EPA on programs to educate growers about IRM requirements;

4] Requirements for the registrant to develop, implement, and report to EPA on programs to evaluate and promote growers’ compliance with IRM requirements;

5] Requirements for the registrant to develop, implement, and report to EPA on programs to evaluate whether there are statistically significant and biologically relevant changes in susceptibility to Cry1Ac protein in the target insects;

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