Volume 17, Issue 6 (2015)
JAST 2015, 17(6): 1517-1528 |
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Hosseini A, Hosseini M, Goldani M, Karimi J, Madadi H. Effect of Nitrogen Fertilizer on Biological Parameters of the Aphis craccivora (Hemiptera: Aphidiae) and Associated Productivity Losses in Common Globe Amaranth. JAST 2015; 17 (6) :1517-1528
URL: http://jast.modares.ac.ir/article-23-7957-en.html
URL: http://jast.modares.ac.ir/article-23-7957-en.html
1- Department of Plant Protection, College of Agriculture, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran.
2- Department of Agronomy, College of Agriculture, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran.
3- Department of Entomology, Faculty of Agriculture, Bu Ali Sina University, Hamedan, Islamic Republic of Iran.
2- Department of Agronomy, College of Agriculture, Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran.
3- Department of Entomology, Faculty of Agriculture, Bu Ali Sina University, Hamedan, Islamic Republic of Iran.
Abstract: (13321 Views)
Reducing nitrogen status of floriculture plants is an effective tactic in pest management by decreasing host plant quality. Life table parameters and population growth rate of Aphis craccivora(Hemiptera: Aphidiae), as well as cosmetic and qualitative parameters losses associated with aphid infestation were evaluated in relation to N fertilization levels on Gomphrena globosa, under greenhouse condition. Four N fertilization levels (0, 30, 60, and 100% of recommended 2 kg m-3) were used. The results indicated that aphid’s intrinsic rate of natural increase on plants fertilized with 100% of the recommended N level was the highest. Abundance and population growth rate of aphid also positively correlated with N fertilization levels. The interactive effect of aphid population and N fertility significantly affected growth parameters of the plants. In the absence of aphid, plant yield improved linearly with increasing N levels. However, aphid population highly decreased shoot to root ratio and the number of flowers in plants fertilized with 100% of the recommended N level. According to our findings, fine-tuning fertility to reduce A. craccivora population is a steadfast tactic to produce marketable globe amaranth ornamental plant.
Keywords: Aphid performance, Aphis craccivora, Nitrogen fertilization, Plant yield, Population growth
Article Type: Review |
Subject:
Agricultural Entomology
Received: 2014/04/16 | Accepted: 2014/11/23 | Published: 2015/11/1
Received: 2014/04/16 | Accepted: 2014/11/23 | Published: 2015/11/1
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