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Fadl, A. (2017). Study of Life Table Parameters for Bird Cherry-Oat Aphid, Rhopalosiphum padi (Linnaeus), Reared on Wheat Plants. Journal of Plant Protection and Pathology, 8(7), 329-331. doi: 10.21608/jppp.2017.46324
Asmaa A. A. Fadl. "Study of Life Table Parameters for Bird Cherry-Oat Aphid, Rhopalosiphum padi (Linnaeus), Reared on Wheat Plants". Journal of Plant Protection and Pathology, 8, 7, 2017, 329-331. doi: 10.21608/jppp.2017.46324
Fadl, A. (2017). 'Study of Life Table Parameters for Bird Cherry-Oat Aphid, Rhopalosiphum padi (Linnaeus), Reared on Wheat Plants', Journal of Plant Protection and Pathology, 8(7), pp. 329-331. doi: 10.21608/jppp.2017.46324
Fadl, A. Study of Life Table Parameters for Bird Cherry-Oat Aphid, Rhopalosiphum padi (Linnaeus), Reared on Wheat Plants. Journal of Plant Protection and Pathology, 2017; 8(7): 329-331. doi: 10.21608/jppp.2017.46324

Study of Life Table Parameters for Bird Cherry-Oat Aphid, Rhopalosiphum padi (Linnaeus), Reared on Wheat Plants

Article 6, Volume 8, Issue 7, July 2017, Page 329-331  XML PDF (214.06 K)
Document Type: Original Article
DOI: 10.21608/jppp.2017.46324
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Author
Asmaa A. A. Fadl*
Plant Prot. Res. Inst., Agric. Res. Center, Dokki, Giza
Abstract
The study were conducted on life table parameters for bird cherry-oat aphid,Rhopalosiphum padi (Linnaeus) (Hom., Aphididae), on wheat seedlings at 15, 20 and 25oC constant temperatures. The survival rates were 77.2, 77.7 and, 62.5% at 25, 20 and 15oC, respectively. Time to 50% mortality (days) decreased gradually to 33.5, 30.5 and 17.5 by temperature increase from 15, 20 to 25oC, respectively. The longest mean generation time (T) (28.66 days) was recorded at 15oC. This duration decreased gradually (17.10 and 12.24 days) by the increase of temperature from 20 to 25oC, respectively. Highest net reproductive rate (Ro) as 41.56 was recorded at 20oC then decreased gradually to 31.375 and 27.36364 at 15 and 25oC, respectively. The rate of Intrinsic increase (rm), recorded as 0.270 at 25oC, followed by 0.218 at 20oC and the lowest as 0.120 at 15oC. Rate of finite increase (exp. rm) followed the same sequence of (rm). It was recorded as 1.310, 1.243 and 1.128 at 25, 20 and 15oC, respectively. The highest population doubling time (PDT) reached (5.765 days) at 15oC. This value was lower (3.180 days) at 20oC followed by (2.564 days) at 25oC, respectively.
Keywords
Rhopalosiphum padi; life table parameters; constant temperature
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