Impacts of Temporal and Spatial Climatic Changes on Annual Generations of Rhopalosiphum maidis and R. padi (Hemiptera: Aphididae) in Egypt, Using Geographical Information System (GIS)

Tabikha, Reda Mohammed M. (2016) Impacts of Temporal and Spatial Climatic Changes on Annual Generations of Rhopalosiphum maidis and R. padi (Hemiptera: Aphididae) in Egypt, Using Geographical Information System (GIS). AGRÁRINFORMATIKA / JOURNAL OF AGRICULTURAL INFORMATICS, 7 (1). pp. 13-22. ISSN 2061-862X

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Abstract

Corn leaf aphid Rhopalosiphum maidis and bird cherry-oat aphidR. padi, attacking many host plants, which be recorded not only in most localities of Egypt but also along a year. So, numbers of generations could be calculated and predictedin all localities by employing Geographical Information System (GIS)and by exploiting calculated values of daily degree units and thresholds of development for them, with current and future thermal climatic conditions. Biannually generations' numbers of them differ from region to another, that numbers of wintery and summery generations of R. maidisranged between 1-29 and 12-50 generations, respectively under current conditions. Expected generations numbers will changed with rates ranged between -4: 14 and -24:16 generations, respectively in 2050, and with rates ranged -3: 15 generation and -42: 17 generation, respectively in 2070.On other hand, Numbers of wintery and summery generations of R. padiranged between 1–27and 11-42 generations, respectively under current conditions.Finally expected numbers of wintery and summery generation in 2070 will be nearly similar to 2050, that its changing rates ranged between -3: 14 generation and -36: 16 generation, respectively. Temporal spatial distributions and variations of generation numbers in different regions and governorates of Egypt were discussed under current and future conditions. Moreover future of growing cereal crops was also discussed especially in southern reclaimed regions.

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