Field Edge (image) Penn State Share Print E-Mail Caption Researchers are advocating increased caution using certain herbicides that have a range of effects -- positive and negative -- on field edges and old fields. The researchers studied the effects of dicamba and 2,4-D on plants and animals that lie just outside of the targeted area for the sprays. Credit J. Frank EJ. Franklin Egan Usage Restrictions Non commercial use only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.