Russia is one of the key exporters of asbestos.
Reports that a consignment of Sri Lanka tea to Russia contained insects prompted the import suspension are false, the sources say.
According to the sources, the exportation of dust tea is continuing despite a high level of checks to ensure quality of tea exports.
Racketeers add sodium carbonate and other chemicals to rejected consignments and get them approved for exportation, the sources say.
Appointees to Tea Research Institute
Meanwhile, reports reaching Sri Lanka Mirror say new chairman of the Tea Research Institute Jayantha Gawarammana, an indigenous doctor, does not have any knowledge of the subject.
Trade unions have been strongly critical of this, and other, appointments made by the plantation industries minister to the Institute, accusing him of violating the recruitment procedures to favour his acquaintances.