A technique for ageing cocoons of the sawfly Neodiprion sertifer (Hymenoptera : Diprionidae)
Chai, F.C.; Dixon, S.E.
Canadian Entomologist 103(1): 80-83
ISSN/ISBN: 0008-347X DOI: 10.4039/ent10380-1
The following is based largely on the authors' abstract. A technique for determining the age of cocoons of Neodiprion sertifer (Geoffr.) in Canada using the redox dye 2, 6-dichloroindophenol is outlined. New cocoons reduce 1 ml 0.001% 2, 6-dichloroindophenol in 85% ethanol from blue to colourless in 15 min.