Mealy bug-Ferrisia virgata
Sucks the sap from leaves and stems, sometimes from fruits if heavily infested , and causes crinkling leaves, dry stems and reduced reproductive parts.
Treatment with Chlorpyrifos or Mercaptothion, Dimethoate.
NOTE: THE USE OF ANY RECOMMENDED TREATMENT ON THIS PAGE IS ON USERS OWN RISK AND SHOULD BE ALLOWED FOLLOWING LOCAL LAW AND REGISTRATION. (Actually this is a big problem, since no pest- or fungicides are being specifically registered for Jatropha. Jatropha as a crop is simply too new and only recently got the interest from pesticide manufacturers)