scholarly journals Population abundance of pomegranate aphid, Aphis punicae (Homoptera: Aphididae), predators in Southwest of Iran

2018 ◽  
Vol 50 (1) ◽  
Author(s):  
S. Yaghobi ◽  
A. Rajabpour ◽  
N. Zandi Sohani
Keyword(s):  
Critical Role ◽  
Coccinella Septempunctata ◽  
Management Program ◽  
Natural Control ◽  
Important Pest ◽  
Aphid Predators ◽  
Insect Predators ◽  
Southwest Of Iran ◽  
Seasonal Population ◽  
Seasonal Population Dynamics

Pomegranate aphid, Aphis punicae Passarini (Hom., Aphididae) is an important pest of pomegranate in Iran. Predators play critical role in natural control of the pest. In this study, seasonal population dynamics of the aphid predators were investigated during two years (2016/2017) in Ilam province, southwest of Iran. Samplings were bi-weekly performed in an experimental pomegranate orchard. Four insect predators, Coccinella septempunctata L., Oenopia congelobata L. (Col., Coccinellidae), Xanthogramma pedisseguum Haris (Dip., Syrphidae) and Chrysoperla carnea Stephens (Neu., Chryspidae) were identified as predators of A. punicae in Ilam. The natural enemies occurred during March to May in both years. The highest and the lowest densities were belong to X. pedisseguum and O. congelobata, respectively. Results of the study can be used for developing integrated pest management program of A. punicae in pomegranate orchards.

scholarly journals Seasonal population dynamics of Octopus vulgaris in the eastern Mediterranean

2006 ◽  
Vol 63 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Stelios Katsanevakis ◽  
George Verriopoulos
Keyword(s):  
Eastern Mediterranean ◽  
Late Summer ◽  
Main Peak ◽  
Octopus Vulgaris ◽  
Late Winter ◽  
Visual Census ◽  
The Common ◽  
Specific Growth Rates ◽  
Seasonal Population ◽  
Seasonal Population Dynamics

Abstract The population density of Octopus vulgaris was measured by visual census with scuba diving in coastal areas in Greece (eastern Mediterranean). A time-variant, stage-classified, matrix population model was developed to interpret the seasonal variation of octopus stage densities and to estimate several life cycle parameters. An annual and a semi-annual periodic cycle were found in the stage densities. A main peak of benthic settlement was observed during summer and a secondary, irregular one during late autumn. Two spawning peaks were estimated, a main one during late winter–spring and a secondary one during late summer–early autumn. More than 50% of the just-settled individuals will eventually die after 3 months. Mortality rate declines, as individuals grow larger, reaches a minimum approximately 6 months after settlement, and then grows again probably because of terminal spawning. The life expectancy of recently settled individuals (<50 g) during their summer peak is approximately 5 months. The lifespan of the common octopus is estimated to be between 12 and 15 months. The octopuses' mean specific growth rates (±s.d.) in their natural environment were 1.61 ± 0.30 d−1 for 50–200 g individuals and 1.19 ± 0.31 d−1 for 200–500 g individuals.

scholarly journals Seasonal population dynamics of the clover cyst nematode (Heterodera trifolii)

2000 ◽  
Vol 53 ◽  
pp. 452-452
Author(s):  
P.P. Kyi ◽  
P.G. Long ◽  
C.F. Mercer ◽  
R.A. Skipp ◽  
G.W. Yeates
Keyword(s):  
Population Dynamics ◽  
Cyst Nematode ◽  
Seasonal Population ◽  
Seasonal Population Dynamics

scholarly journals Life table parameters of the aphid predators Coccinella septempunctata, Ceratomegilla undecimnotata and Propylea quatuordecimpunctata (Coleoptera: Coccinellidae)

2008 ◽  
Vol 105 (3) ◽  
pp. 427-430 ◽  
Author(s):  
Dimitrios C. KONTODIMAS ◽  
Panagiotis G. MILONAS ◽  
George J. STATHAS ◽  
Nickolaos E. PAPANIKOLAOU ◽  
Anna SKOURTI ◽  
...  
Keyword(s):  
Life Table ◽  
Coccinella Septempunctata ◽  
Life Table Parameters ◽  
Propylea Quatuordecimpunctata ◽  
Aphid Predators

Seasonal population dynamics of a specialized termite-eating spider (Araneae: Ammoxenidae) and its prey (Isoptera: Hodotermitidae)

Pedobiologia ◽  
2016 ◽  
Vol 59 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Charles Richard Haddad ◽  
Marek Brabec ◽  
Stano Pekár ◽  
René Fourie
Keyword(s):  
Population Dynamics ◽  
Seasonal Population ◽  
Seasonal Population Dynamics

scholarly journals Influence of Trap Color, Type, and Placement on Capture Efficacy for Protaetia brevitarsis (Coleoptera: Scarabaeidae)

2020 ◽  
Author(s):  
Huanhuan Cai ◽  
Tao Zhang ◽  
Yinghua Su ◽  
Zhongyue Wang ◽  
Xiaofang Zhang ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Field Tests ◽  
Management Program ◽  
Vitis Vinifera L ◽  
Placement Tests ◽  
Laboratory Studies ◽  
Choice Tests ◽  
Trap Color ◽  
Important Pest ◽  
Trap Placement

Abstract In recent years, Protaetia brevitarsis Lewis has gradually become an important pest of several crops including grape (Vitis vinifera L.) and peach (Amygdalus persica L.) in Xinjiang, China. Toward improving trapping efficacy as part of a management program, various colors, types, and placement of traps and the use of an attractant were evaluated in field and laboratory studies. Laboratory color-choice tests and field tests indicated that P. brevitarsis adults preferred red. In trap placement tests, more adults were captured on traps placed 1 or 1.5 m above the ground and on top of the horizontal grape canopy. Before grape ripening, more adults were captured in traps placed in a 0.5-m border around the outside edge of the vineyard; during grape ripening, more were caught within the vineyard. Newly designed traps that were red, with a triangular baffle and a landing plate, were more efficient than traditional bucket-shaped traps. When P. brevitarsis adults were trapped and killed from June to July 2018, the population of P. brevitarsis adults in August to early September 2018 was significantly lower than in August to early September 2017, when adults had not been trapped and killed in the prior 2 mo.

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