Search

Start Over Creator Kontodimas, Dimitrios

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

Creator:
Kontodimas, Dimitrios, Milonas, Panagiotis, Stathas, George, Papanikolaou, Nickolaos E., Skourti, Anna, and Matsinos, Yiannis G.
Type:
article, model:article, and TEXT
Subject:
Coccinellidae, Coccinella septempunctata, Ceratomegilla undecimnotata, Propylea quatuordecimpunctata, Aphis fabae, fecundity, and life tables
Language:
English
Description:
The life tables of the aphid predators Coccinella septempunctata L., Ceratomegilla undecimnotata (Schneider) and Propylea quatuordecimpunctata (L.) (Coleoptera: Coccinellidae), fed on Aphis fabae Scopoli (Hemiptera: Aphididae), were constructed at constant conditions (25 ± 1°C, 65 ± 2% RH; 16L : 8D). The average total fecundities of C. septempunctata, C. undecimnotata and P. quatuordecimpunctata were 1996.8, 1160.5, and 724.6 eggs / female, and the average longevities were 94.9, 88.3, and 68.9 days, respectively. The net reproductive rates (Ro) were 1004.1, 544.3, and 375.1 females/female, and the intrinsic rates of increase (rm) 0.118, 0.142 and 0.166 females/female/day, respectively.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. The aphidophagous predator Harmonia axyridis (Coleoptera: Coccinellidae) in Greece, 1994-1999

Creator:
Kontodimas, Dimitrios, Stathas, George J., and Martinou, Aggeliki
Type:
article, model:article, and TEXT
Subject:
Harmonia axyridis, invasive ladybirds, native ladybirds, biocontrol agents, Greece, overwintering, Aphis fabae, Toxoptera aurantii, Aphis gossypii, and Aphis spiraecola
Language:
English
Description:
During the years 1994-1999, several hundreds of thousands of H. axyridis adults were released at various cultivations infested by aphids (citrus, vegetable and bean crops, maize etc.) and on ornamental plants in urban settings in central and southern Greece (mainly Attica and Peloponessos region) as well as on several islands. Between 1995-1999, spring sampling was conducted in some areas, just prior to releases, in order to determine if H. axyridis overwintered in the field. No presence of H. axyridis was recorded in any of the orchards where the predator had been released save in spring of 1998 and 1999 when small colonies (<50 individuals) of overwintered H. axyridis adults were observed in the Attica region. The above results suggest an inability of released H. axyridis populations to establish in Greece, although in some areas this species became an important biocontrol agent during the growing season.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public