摘要 : Growth performance of foliage feeder, <i>Spirama retorta</i> Cram. (Lepidoptera: Noctuidae), was measured in eleven sources of <i>Albizia procera</i> Benth. (Mimosaceae), scattered over the natural ranges of India (Madhya Pradesh,... 展开 Growth performance of foliage feeder, <i>Spirama retorta</i> Cram. (Lepidoptera: Noctuidae), was measured in eleven sources of <i>Albizia procera</i> Benth. (Mimosaceae), scattered over the natural ranges of India (Madhya Pradesh, Chhattisgarh, Uttar Pradesh, Uttarakhand and Tripura), following one day feeding by penultimate 1-day-old and last instar 1- and 5-day-old larvae. The weight gained by larvae were attributable to differences in seed source were statistically heterogeneous (P<0.05-P<0.01). The seed source of Agartala (Tripura) provenance exhibited minimum larval growth, whereas maximum growth was noticed in provenance, Bizadandi (Madhya Pradesh), irrespective of larval stages. The difference in parameter may be due to variations in foliage of <i>A. procera</i> sources which possibly altered the larval growth of the insect. Among the larval instars, larval weight gained was significantly (P<0.01) greater in 1-day-old last instar larvae followed by 5-day-old last instar and 1-day-old penultimate instar larvae. The results were discussed in the light of the present findings. 收起