Life tables, key factor analysis and density relations in natural populations of the legume pod borer Maruca testulalis Geyer (Lepidoptera: Pyralidae) in Western Kenya

1991 ◽  
Vol 12 (04) ◽  
pp. 423-431
Author(s):  
J. B. Okeyo-Owuor ◽  
G. W. Oloo
Keyword(s):  
Factor Analysis ◽  
Natural Populations ◽  
Maruca Testulalis ◽  
Life Tables ◽  
Western Kenya ◽  
Pod Borer ◽  
Legume Pod Borer ◽  
Key Factor ◽  
Key Factor Analysis ◽  
Lepidoptera Pyralidae

scholarly journals Population dynamics of Saissetia oleae. II. Life-tables and key-factor analysis

2017 ◽  
Vol 8 ◽  
pp. 59 ◽  
Author(s):  
E. T. Kapatos ◽  
E.T. Stratopoulou
Keyword(s):  
Factor Analysis ◽  
Population Dynamics ◽  
Population Change ◽  
Life Tables ◽  
Population Fluctuations ◽  
Mortality Factors ◽  
Population System ◽  
Key Factor ◽  
Key Factor Analysis ◽  
Table Data

A series of life-tables for the population of Saisselia oleae (Oliv.) (Homoptera: Coccidae) during five yearly generations (1981-86) were constructed in Corfu. Key-factor analysis carried out on the life-table data indicated that mortality of young stages during summer, caused mainly by the high temperatures, and mortality during spring, caused mainly by predation, determine total population change within each generation. These two mortality factors are the predominant factors of the population dynamics of S. oleae determining population fluctuations. The other mortality factors of the population system of S. oleae were less important. Summer parasites and egg predators, in particular, do not play any significant role on the population dynamics of S. oleae.

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