Biological Aspects of the Theridiid Spider Theridion Melanostictum Cambridge (Araneida: Theridiidae) Fed on Different Prey | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 8, Issue 2, February 2017, Page 55-58 PDF (193.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2017.46142 | ||||
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| Authors | ||||
| M. M. Ahmed1; M. A. M. Mohafez1; M. M. El-Sebaay2; A. M. Mansour2 | ||||
| 1Zool. and Nemat. Dept. Fac. of Agric., Cairo, Al-Azhar University. | ||||
| 2Plant Protection Research Institute, A.R.C., Dokki, Giza, Egypt. | ||||
| Abstract | ||||
| Theridion melanostictum spider was collected from El-Ameria region, Alexandria governorate in 2016 on citrus plants and reared under laboratory conditions of 25±2°C and 60-70 % R.H. when fed on the cotton leaf worm Spodoptera littoralis Boisd. and Gynaikothrips ficorum (Marchal). Spider males and females passed through four spiderlings of male and five spiderlings for female. The incubation period lasted 12.2 and 15.2 days for female and 12.2 and 15.2 days for males when fed on S. littoralis and G. ficorum, respectively. During the total immature stages of T. melanostictum, the spider durated 59.6 and 38.2 days for female and male spiderlings, respectively when the individuals fed on S. littoralis and averaged of 88.6 and 63.0 days in case of feeding on G. ficorum, respectively. The life cycle of T. melanostictum averaged of 71.8, 50.4, 103.8, 78.2 days for female and male fed on a aforementioned preys, respectively. The spider longevity lasted 59.6, 36.4, 72.2 and 44.4 days for female Longevity and 59.6, 36.4; 72.2, 44.4 days for adult food of males individuals when reared on the some prey mentioned before, respectively. The preoviposition period lasted 13.82 and 15.62 days when females fed on S. littoralis and G. ficorum, respectively. The total mean number of consumed individuals of S. littoralis and G. ficorum was 148.0 and 414.8 prey for the total spiderling female, respectively. These values changed to 100.6 and 307.2 preys, respectively. The average number of consumed prey per adult female of T. melanostictum was more than those of male, as, the number of prey consumed was 137.0 and 94.0 prey of S. littoralis during the feeding of spider female and male, respectively. However, the average number of consumed G. ficorum during the life of T. melanostictum female was 200.8 prey and 89.0 prey of G. ficorum during the feeding of spider males. The mean number of consumed prey was 41.8 and 36.8 individuals of S. littoralis and G. ficorum, respectively during the pre-oviposion period. The average number of devoured prey was 58.2 and 97.0 prey of both prey during the oviposition period of spider female, respectively, while the spider consumed 37.0 and 68. prey, in case of the post-oviposition period, respectively. It was noticed that the average number of consumed prey per female was more than those of males. Moreover, spider preferred feeding on cotton leaf worm than thrips. | ||||
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