| Titles |
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English :
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Influence of some Agricultural practices on infestation of
canola, Brassica napus (L.) with the cabbage aphid, Brevicoryne brassicae (Linn.) (Homoptera, aphididae) and yield losses of three canola varieties in Upper Egypt
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Arabic :
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تأثير بعض العمليات الزراعية على إصابة نباتات الكانولا بمنَ الكرنب Brevicoryne brassicae فى مصر العليا مع تقدير الفقد فى المحصول لثلاثة أصناف
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| Abstract |
Effects of four sowing dates (1st October, 15th October, 1 st November and 15th November), three nitrogen fertilization levels (30, 45 and 60 kg/fed.) and two potassium fertilization levels (24 and 48 kg/fed.) on infeslation of canola plants Brassica napus (L.) with the cabbage aphid, B. brassicae were studed. In addition, yield losses of three canola genotypes due to aphid infestation were estimated at Shandaweel Agric. Res. St., Sohag Governorate, Upper Egypt during 2004/2005 and 2005/2006 growing seasons. The obtained results indicated that infestation with B. brassicae increased by delaying sowing dates during both seasons. Thc effect of planting dates lst Oct., and 15th Oct., exhibited the lowest rate of infestation with B. brassicae during both seasons. Infestation with B. brassicae significantly increased by increasing nitrogen fertilization levels during both seasons. On the contrary, infestation with B. brassicae significantly decreased by increasing potassium fertilization levels during both seasons. The results of interactions among the difierent treatments, sowing dates x nitrogen fertilization levels, sowing dates x potassium fertilization levels, nitrogen x potassium fertilization levels and sowing dates x nitrogen levels x potassium levels had a significant effect on the population density of B. brassicae during both seasons. Also, the interactions between the early sowing date (lst Oct.) x N level (30 kg/fed.), the early sowing date (lst Oct.) x K level (48 kg/fed.), N level (30 kg/fed.) x K level (48 kg/fed.) and the early sowing date (1st Oct.) x N level (30 kg/fed.) x K level (48 kg/fed.) recorded the lowest aphid population density during both seasons. In spite of the treatments l st Oct. x 30 kg N/fed. and 48 kg K/fed. achieved the lowest aphid infestation during both seasons, so according to recommendations of the Ministry of Agriculture, they gave low yield. Therefore, the treatments 15th Oct. x 45 kg N/fed. and 48 kg K/fed. were suitable for giving a low aphid infestations and a high yield at the same time. There was a highly significant positive correlation between aphid numbers and yield loss of the three canola genotypes during 2005 and 2006 seasons and there were insignificant differences among the three genotypes during both seasons.
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| Publication year |
2007
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| Pages |
271-279
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| Availability location |
معهد بحوث وقاية النباتات
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| Availability number |
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
القاهرة
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| serial title |
المجلة العلمية
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| ISSN |
0526-8613
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| Author(s) from ARC |
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| External authors (outside ARC) |
احمد محمود على سالمان
كلية الزراعة -جامعة سوهاج
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Brassica napus.
Brevicoryne brassicae.
Crop losses.
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| Publication Type |
Journal
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