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Laborarory Studies on the Effect of Population Density of the Scale Insect Parlatoria blanchardi on Some Biological Aspects of the Predator Chilocorus bipustulatus | ||
| Jornal of Biotechnology Research Center | ||
| Article 1, Volume 11, Issue 2, 2017, Pages 52-55 | ||
| Author | ||
| Shaimaa Hameed Kamil | ||
| Abstract | ||
| Laboratory studies were conducted to evaluate the effect of the scale insect, Parlatoria blanchardi density on some biological aspects of predator Chilocorus bipustulatus. Result showed that larval development periods are inversely proportional to the density of the scale insect P. Blanchardi. The shortest larval period was 20 days on the density of 80 nymphs, However, the period of larval development was increased to 33.5 days on the density of 25 nymphs with significant diffrences. No larvae can survive when reared on density of 10 nymphs. There was positive correlation between Predator efficiency and its survival with and P. blanchardi density .The lowest consumption was 643.6 nymphs/ day with 40% survival percent when on the density of 25 nymphs, while consumption increased to 1530.3 nymphs/ day with 60% survival percent when density increased to 80 nymphs with significant diffrences.The density of 65 nymphs was the best to rear the larvae because the the larval period was the lowest with high survival and no significant difference with the density of 80 nymphs. | ||
| Keywords | ||
| population density; Parlatoria blanchardi; Chilocorus bipustulatus | ||
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