Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov)
Russian wheat aphid Diuraphis noxia (Kurdjumov) is widely established in wheat-growing countries where it causes significant economic losses. The development and use of Russian wheat aphid (RWA)-resistant wheat varieties has been constrained by the variation in resident RWA populations and the evolu...
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MDPI AG
2016-04-01
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| Series: | Insects |
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| Online Access: | http://www.mdpi.com/2075-4450/7/2/12 |
| _version_ | 1818990864415850496 |
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| author | Watson Ngenya Joyce Malinga Isaiah Tabu Emily Masinde |
| author_facet | Watson Ngenya Joyce Malinga Isaiah Tabu Emily Masinde |
| author_sort | Watson Ngenya |
| collection | DOAJ |
| description | Russian wheat aphid Diuraphis noxia (Kurdjumov) is widely established in wheat-growing countries where it causes significant economic losses. The development and use of Russian wheat aphid (RWA)-resistant wheat varieties has been constrained by the variation in resident RWA populations and the evolution of virulent biotypes. An experiment was set up at the Kenya Agricultural and Livestock Research Organization (KALRO), Njoro, to characterize RWA populations based on phenotypic characteristics of reproduction, development and population dynamics. RWA populations from the regions of Eldoret, Mau Narok and Njoro were used in the study. A factorial experiment was set up in randomized complete block design replicated eleven times. A single day-old nymph was placed on a new, fully-open leaf in a 0.5 cm-diameter clear plastic straw leaf cage and observed daily for its entire lifetime. The results showed that there were variations in aphid lifespan, reproductive longevity and aphid fecundity between populations, indicating that the phenotypic markers used to determine biotypes were good enough to show distinct biotypes among populations of the RWA in Kenya. Further, the study concluded that the use of phenotypic life and reproductive markers was a valid way of characterizing biotypes of RWA worldwide. |
| first_indexed | 2024-12-20T20:01:09Z |
| format | Article |
| id | doaj.art-759e467562934bf29f4f7e178edb198f |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-12-20T20:01:09Z |
| publishDate | 2016-04-01 |
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| record_format | Article |
| series | Insects |
| spelling | doaj.art-759e467562934bf29f4f7e178edb198f2022-12-21T19:28:03ZengMDPI AGInsects2075-44502016-04-01721210.3390/insects7020012insects7020012Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov)Watson Ngenya0Joyce Malinga1Isaiah Tabu2Emily Masinde3Department of Crops, Horticulture and Soils, Egerton University, Egerton 536-20115, KenyaKenya Agricultural and Livestock Research Organization, Food crops institute, Kitale 450-30200, KenyaDepartment of Crops, Horticulture and Soils, Egerton University, Egerton 536-20115, KenyaDepartment of Crops, Horticulture and Soils, Egerton University, Egerton 536-20115, KenyaRussian wheat aphid Diuraphis noxia (Kurdjumov) is widely established in wheat-growing countries where it causes significant economic losses. The development and use of Russian wheat aphid (RWA)-resistant wheat varieties has been constrained by the variation in resident RWA populations and the evolution of virulent biotypes. An experiment was set up at the Kenya Agricultural and Livestock Research Organization (KALRO), Njoro, to characterize RWA populations based on phenotypic characteristics of reproduction, development and population dynamics. RWA populations from the regions of Eldoret, Mau Narok and Njoro were used in the study. A factorial experiment was set up in randomized complete block design replicated eleven times. A single day-old nymph was placed on a new, fully-open leaf in a 0.5 cm-diameter clear plastic straw leaf cage and observed daily for its entire lifetime. The results showed that there were variations in aphid lifespan, reproductive longevity and aphid fecundity between populations, indicating that the phenotypic markers used to determine biotypes were good enough to show distinct biotypes among populations of the RWA in Kenya. Further, the study concluded that the use of phenotypic life and reproductive markers was a valid way of characterizing biotypes of RWA worldwide.http://www.mdpi.com/2075-4450/7/2/12Diuraphis noxiapopulationpreferencereproduction |
| spellingShingle | Watson Ngenya Joyce Malinga Isaiah Tabu Emily Masinde Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) Insects Diuraphis noxia population preference reproduction |
| title | Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) |
| title_full | Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) |
| title_fullStr | Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) |
| title_full_unstemmed | Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) |
| title_short | Reproduction and Population Dynamics as Biotypic Markers of Russian Wheat Aphid Diuraphis noxia (Kurdjumov) |
| title_sort | reproduction and population dynamics as biotypic markers of russian wheat aphid diuraphis noxia kurdjumov |
| topic | Diuraphis noxia population preference reproduction |
| url | http://www.mdpi.com/2075-4450/7/2/12 |
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