A Study of the Nymphal Aggregation of Dieuches Femoralis Eyles (Heteroptera: Lygaeidae)
The effects of population density on nymphal development and mortality, synchronism in moulting, body weight and reproductive development of ensuing adults were studied in Dieuches femoralis Eyles. The development time of larvae was found to vary with density such that the development time decreased as the number of larvae per cage increased through 5, 10, 15 and 30. The most crowded cages also produced the heaviest adults and females from these cages developed the greatest number of eggs. The solitary larvae produced more females than males.
Key WordsAggregation Dieuches femoralis population density solitary larvae Lygaeidae effects of density synchrony
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- Faure J. C. (1943a) The phases of the lesser army worm, Laphagma exigua Hubu. Emg. in S. Afr. 18, 69–78.Google Scholar
- Faure J. C. (1943b) Phases variation in the army worm, Laphygma exempta Walk. Sci. Bull. Dast. Agric. For. S. Afr. No. 243.Google Scholar
- Kiritani K. and Hokyo N. (1965) Variation of egg mass size in relation to the oviposition pattern in pontatomidae. Kontu 33, 427–433.Google Scholar
- Mizuta K. (1960) Effect of individual number on development and survival of the larvae of two lymantriid species living in aggregation and in scattering. Jap. J. Ent. Zool. 4, 146–152.Google Scholar
- Youdeowei A. (1966) Laboratory studies on the aggregation of feeding Dysdercus intermedius Dist. (Heteroptera: Pyrrhocoridae). Proc. R. Soc. Lond. (A) 41, 45–50.Google Scholar