Abstract
The suitability of rice, Oryza sativa (L.), sorghum, Sorghum bicolor (L.) Moench, and vasey grass, Paspalum urvillei Stuedel, as host plants of the rice stink bug, Oebalus pugnax (F.), were determined at 21, 24, 27, and 30°C. At 21, 24, and 27°C there were no significant ( P sorghum > vasey grass), but at 21 and 27°C weights of adults from rice and grain sorghum were similar. Nymphal survival was significantly ( P < 0.05) greater on rice and grain sorghum than on vasey grass at each temperature except 21°C, where there was no difference between insect survival on vasey grass and grain sorghum. At 21 and 27°C, development time (egg to adult) was significantly ( P < 0.05) shorter on grain sorghum than on rice or vasey grass, but at 24 and 30°C no differences in developmental time existed. The mean development time from egg to adult on rice, sorghum, and vasey grass at 30°C was 22.9 days, 20.7 days, and 22.3 days, respectively.
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