| Titles |
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English :
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INORGANIC FERTILIZATION OF COTTON FIELD-PLANTS IN RELATION TO SUCKING INSECTS AND YIELD PRODUCTION COMPONENTS OF COTTON PLANTS
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Arabic :
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التسميد غير العضوى لنباتات القطن الحقلية وعلاقته بالحشرات الثاقبة الماصة وانتاجية المحصول
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| Abstract |
In modern agriculture, the most critical problem for increasing yield and developing sustainable agriculture is sufficient fertilizers supply and successful crop protection against herbivores and pathogens. Field experiments were conducted at Sakha Agricultural Research Station, Egypt to investigate the influence of nitrogen (N), phosphorus (P) and potassium (K) fertilizers at their recommended rates per feddan (NPK units ratio of 66:30:24) on the population densities of jassid, Impoasca spp.; cotton aphid, Aphis gossypii Glover and whitefly, Bemisia tabaci Gennadius infesting cotton plants cv. Giza 89 during 2009 and 2010 seasons. Also, the effect of tested fertilizers on cotton plants growth was studied. Seven fertilizer treatments i.e. N, P, K, NP, NK, PK and NPK were evaluated. Obtained results indicated that nitrogen fertilizer significantly reduced the population density of Impoasca spp. whereas, it enhanced the population densities of both A. gossypii and B. tabaci in the two seasons of study. Plants fertilized with potassium either alone or in combinations with others were significantly infested with the lowest population densities of Impoasca spp. and A. gossypii and were infested with moderate numbers of B. tabaci. Phosphorus fertilizer proved to be very effective in lowering the incidence of B. tabaci on treated plants, but it increased the density of Impoasca spp. significantly. Plants treated with NPK in combination were infested with moderate population densities of the three insects. In both seasons of our study, the highest average numbers of squares and green bolls per cotton plant were observed on plants treated with NPK. On the contrary, plants which fertilized with K only significantly fruited the lowest means of squares and green bolls per plant. Further studies should be done to limit the adequate combination of N, P and K for cotton maximum production and minimum insects infestation under Egyptian agricultural conditions.
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| Publication year |
2012
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| Pages |
509- 517
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| serial title |
مجلة العلوم الأمريكية
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| Author(s) from ARC |
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Aphis gossypii.
Bemisia tabaci.
Cotton.
Nitrogen.
Phosphorus.
Potassium.
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| Publication Type |
Journal
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