1. A pesticidal composition having improved resistance to washing, said composition comprising: A. active component selected from glufosinate, glyphosate, and combinations thereof and b. polyethyleneimine having a weight average molecular weight at least about 750,000 g / mol.2. A pesticidal composition according to Claim. 1, wherein the polyethyleneimine has a weight average molecular weight of about 750,000 g / mol to about 2,000,000 g / mol.3. A pesticidal composition according to Claim. 1, wherein the polyethyleneimine has a weight average molecular weight of about 1,000,000 g / mol to about 2,000,000 g / mol.4. A pesticidal composition according to Claim. 1, wherein the polyethyleneimine has a weight average molecular weight of about 2,000,000 g / mol.5. A pesticidal composition according to any one of claims. 1-4, further comprising water, wherein said polyethylene is present in an amount from about 0.0001 wt.% To less than about 0.1 wt.%, Based on the total weight of said kompozitsii.6. A pesticidal composition according to any one of claims. 1-4, further comprising water, wherein said polyethylene is present in an amount of from 0.0001 wt.% To 0.01 wt.%, Based on the total weight of said kompozitsii.7. A pesticidal composition according to any one of claims. 1-4, wherein said active component is present in an amount from about 0.00001 wt.% To about 10 wt.%, Based on the total weight of said kompozitsii.8. A pesticidal composition according to any one of claims. 1-4, further comprising water, wherein said active component is present in an amount from about 0.00001 wt.% To about 10 wt.%, Based on the total weight of said kompozitsii.9. A pesticidal composition according to claim. 5 consisting essentially of said active assembles1. Пестицидная композиция, обладающая улучшенной стойкостью к смыванию, причем указанная композиция содержит:A. активный компонент, выбранный из глуфосината, глифосата и их комбинаций иB. полиэтиленимин, имеющий среднемассовую молекуляр