Effects of Biocontrols (IMAGE) Cell Press Caption This photo shows the effects of volatiles and intercropping. The plant on the left was cultivated in an intercropping scheme in which it was planted with volatile-emitting plants, the plant in the middle was treated with an artificial resistance enhancer, and the plant on the right was not treated. All plants were the same age and were grown outside in the field. Credit Courtesy of Martin Heil. Usage Restrictions Credit Required. License Licensed content 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.