How to translate text using browser tools
1 June 2007 Effect of Irradiation on Dispersal Ability of Male Sweetpotato Weevils (Coleoptera: Brentidae) in the Field
Norikuni Kumano, Tsuguo Kohama, Suguru Ohno
Author Affiliations +
Abstract

We used the mark-and-recapture method in the field to test the effect of gamma radiation on the dispersal ability of the male sweetpotato weevil,Cylas formicarius elegantulus (Summers) (Coleoptera: Brentidae), a serious sweetpotato pest in Japan. To evaluate the dispersal ability of male sweetpotato weevil, we released 27,218 males (13,302 males irradiated with a dose of 200 Gy and 13,916 nonirradiated males) in two replications (September and October 2005). Each replication lasted 5 d from the release of weevils to the removal of traps, and male weevils were released twice (1 and 3 d before trap setting). Forty pheromone traps were placed in lines corresponding to eight compass directions and five distance classes (20, 50, 100, 200, and 500 m) in each replication. We captured 2,263 irradiated males (17.0%) and 2,007 nonirradiated males (14.4%) in the two replications. Six irradiated and eight nonirradiated males were captured in the traps 500 m far from the release point. All parameters to evaluate the dispersal ability of irradiated male sweetpotato weevil (recapture rate, dispersal distance, and dispersal direction) were similar to nonirradiated males in three of the four trials. However, parameters were different between irradiated males and nonirradiated males in one trial. Because the majority of parameters consistently show that the similarity of the dispersal ability, we considered that male sweetpotato weevil irradiated with a dose of 200 Gy possessed equal dispersal ability to that of nonirradiated males in the field.

Norikuni Kumano, Tsuguo Kohama, and Suguru Ohno "Effect of Irradiation on Dispersal Ability of Male Sweetpotato Weevils (Coleoptera: Brentidae) in the Field," Journal of Economic Entomology 100(3), 730-736, (1 June 2007). https://doi.org/10.1603/0022-0493(2007)100[730:EOIODA]2.0.CO;2
Received: 28 April 2006; Accepted: 4 January 2007; Published: 1 June 2007
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

KEYWORDS
Cylas formicarius elegantulus
dispersal ability
gamma radiation
sterile insect technique
sweetpotato weevil
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top