Reference Report for IND89052025
| Title: | Performance of nymphal and adult Nezara viridula on selected alternate host plants. |
| Authors: | Panizzi, A.R., Meneguim, A.M. |
| Source: | Entomol. Exp. Appl. 1989, 50(3):215-223 |
| Abstract: | Laboratory studies with the southern green stink bug, Nezara viridula (L.) (Hemiptera: Pentatomidae), feeding on seeds or fruits of some alternate host plants, demonstrated differences in nymphal survival and development time, and body weight at adult emergence. Lowest mortalities (25%) were observed for nymphs on fruits of dakota mustard [Brassica kaber (DC.)] and siberian motherwort (Leonurus sibiricus L.). On fruits of castor bean (Ricinus communis L.) nymph mortality was ca. 60%, and on nature seeds of L. sibiricus ca. 75%. Total development time from second instar to adult ranged from ca. 26 days on B. kaber to ca. 42 days on R. communis. Fresh body weight at adult emergence was greatest for nymphs on L. sibiricus and lowest on R. communis. Adult survival after 30 days and mean longevity was greater on L. sibiricus than on the remaining foods, being drastically reduced on R. communis. In general, reproductive performance on all foods was similar, except R. communis, on which no female reproduced. Female weight gain of N. viridula was generally greater on L. sibiricus. On R. communis, adults lost weight during their first week and showed the lowest weight gain at the end of day 29. Field observations coupled with these laboratory studies suggest that in the Warta area (northern Parana state, Brazil, 23.degree. 11' S), L. sibiricus and B. kaber are important alternate food plants in the seasonal phenology of N. viridula, R. communis, however, is of poor nutritional quality, serving primarily as a refuge. |
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