translucent oak gall (IMAGE) Penn State Caption In their study, the researchers revealed a potentially novel manipulation of host-plant chemistry in the translucent oak gall, in which the wasp lowered the pH level of the interior of their developing gall to the acidity levels used by pitcher plants. Credit Courtesy Antoine Guiguet Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.