Reference Report for IND82115438
| Title: | Population dynamics of the southern green stink bug (Heteroptera: Pentatomidae) in relation to soybean phenology. |
| Authors: | Schumann, F.W., Todd, J.W. |
| Source: | J. Econ. Entomol. 1982, 75(4):748-753 |
| Abstract: | The effect of planting date, cultivar and stage of soyabean development on population levels of Nezara viridula (L.) was determined in studies in Georgia, USA, using 5 cultivars from different maturity groups planted on 4 dates approximately 2 weeks apart. Factors such as generation overlap, plant growth stage preferences for adult feeding and oviposition and fluctuations in sex ratio were also considered in terms of soyabean phenology. Oviposition by N. viridula was initiated during the late vegetative stages, with peak oviposition occurring between the beginning of pod development and the beginning of podfill. More females than males were found in the early stages of soyabean development. Third-generation examples of N. viridula developed in the early-maturing cultivars, and 4th and 5th generations in the late-maturing ones. Population levels of the pest increased significantly during pod development; the greatest increases were observed during the beginning of podfill, and population levels generally peaked during late podfill. Cultivar and planting date significantly affected N. viridula population levels, but the stage of soyabean development was found to be the predominant factor affecting pest populations. |
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