Authors : R.F. Pourabad , H.R. Dastjerdi and A.A. Fathi
Abstract: Rate of development and biological features of Graphosoma lineatum was studied under laboratory conditions of 28�2�C, 60�5% R.H. and a photoperiod of 16:8 (L:D) feeding the individual insects upon seeds of 5 umbelliferous species namely parsley, fennel, dill, celery and carrot. The results indicated no significant differences regarding the duration of embryonic development in rearings on 5 already mentioned food regimes. The lowest mean larval developmental time, from egg to egg and from egg to adult stages in rearings on dill seeds was estimated as 19.73, 36.30 and 25.47 days, respectively with the highest mean records being as 26.89, 45.3 and 32.39 days in rearings on celery seeds. Regarding the percentage egg hatches, there was no significant differences between 5 treatments. The mean survival rate from first instars larval stage into adult varied from 67.53-46.66% between 5 treatments. The mean number of eggs laid in the rearings on carrot was 99.1 with 79 being in rearings on celery. It was indicated that feeding on carrot seeds resulted in highest survival rate, lowest larval developmental stages and lowest total life cycle. The number of eggs laid by adult females reared on carrot seeds appeared to be higher than on other seeds, lowering in rearing on dill, fennel, parsley and celery, respectively.
R.F. Pourabad , H.R. Dastjerdi and A.A. Fathi , 2008. Effect of Feeding on Seeds of Five Species of Umbelliferae on the Rate of Development and Fecundity of Graphosoma lineatum (L.) (Heteroptera: Scutelleridae). Research Journal of Biological Sciences, 3: 1411-1414.