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Start Over Creator Yasuda, Hironori

1. Effects of conspecific and heterospecific larval tracks on the oviposition behaviour of the predatory ladybird, Harmonia axyridis (Coleoptera: Coccinellidae)

Creator:
Yasuda, Hironori, Takagi, Takumi, and Kogi, Kazunobu
Type:
article, model:article, and TEXT
Subject:
Harmonia axyridis, ladybird, oviposition, oviposition-deterring pheromone, and larval track
Language:
English
Description:
The effect of the oviposition deterring pheromone (ODP) in the larval tracks of conspecific and heterospecific ladybirds on oviposition in Harmonia axyridis Pallas was studied in semi natural conditions. Gravid females of H. axyridis were deterred from ovipositing on plants contaminated with conspecific larval tracks, but not on those with heterospecific tracks. H. axyridis females spent significantly less time on plants contaminated with conspecific ODP than on those with heterospecific ODP. This behaviour may account for why fewer eggs were laid on plants contaminated with conspecific ODP.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Key life stages of two predatory ladybird species (Coleoptera: Coccinellidae)

Creator:
Kindlmann, Pavel, Yasuda, Hironori, Sato, Satoru, and Shinya, Katsuhiro
Type:
article, model:article, and TEXT
Subject:
key factor analysis, survival level, larvae, Harmonia axyridis, Coccinella septempunctata, Coccinellidae, and ladybirds
Language:
English
Description:
Development and survival of larvae of two predatory ladybird species, Harmonia axyridis (Pallas) and Coccinella septempunctata L. on hibiscus (Hibiscus syridis L.) trees was followed daily outdoors during four seasons. Data were analysed and stage-specific mortality in a stage-structured model was estimated using Manly's (1997) method. Subsequently, key factor analysis was used to determine the life stages in which the daily mortality was best correlated with the total mortality during larval life. Consistently with the results from the first two years, the larvae suffered the greatest mortality during the first and fourth instars. The k-values for these two instars were also best correlated with those for the whole larval life, especially in H. axyridis.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public