Evaluation of the impact of sweetpotato weevil (Cylas formicarius) and of the effectiveness of Cylas sex pheromone traps at the farm level in Indonesia

Braun A.R. and Van De Fliert E. (1999) Evaluation of the impact of sweetpotato weevil (Cylas formicarius) and of the effectiveness of Cylas sex pheromone traps at the farm level in Indonesia. International Journal of Pest Management, 45 2: 101-110. doi:10.1080/096708799227888


Author Braun A.R.
Van De Fliert E.
Title Evaluation of the impact of sweetpotato weevil (Cylas formicarius) and of the effectiveness of Cylas sex pheromone traps at the farm level in Indonesia
Journal name International Journal of Pest Management   Check publisher's open access policy
ISSN 0967-0874
Publication date 1999-01-01
Year available 1999
Sub-type Article (original research)
DOI 10.1080/096708799227888
Open Access Status Not yet assessed
Volume 45
Issue 2
Start page 101
End page 110
Total pages 10
Place of publication LONDON
Publisher TAYLOR & FRANCIS LTD
Language eng
Subject 1109 Neurosciences
Abstract We evaluated the impact of sweetpotato weevil (Cylas formicarius (Fabricius); Coleoptera: Apionidae) and of other direct pests and diseases (rats, Ceratocystis fimbriata, white grubs, root rots and root cracks), and the effectiveness of C. formicarius sex pheromone traps at the farm level in four villages in East and Central Java, Indonesia during 1994-1996. Marketable yields of sweetpotato and damage from weevils and from other pests and diseases were higher during the dry season, when damage from weevils reached 8.2% and the impact of other pests and diseases was 16.3%, reducing marketable yield from 3.32 to 2.50 kg/m(2). During the wet season damage from sweetpotato weevil and from other pests and diseases dropped to 2.1 and 12.7% respectively. Varietal differences in damage from weevil and from other pests and diseases were not significant. In field trials with sex pheromone, lure loadings of 10, 50 and 100 mu g placed at trap densities of 9, 25 and 100 traps/ha the average yield was 2.41 kg/m(2) with sweetpotato weevil and other direct pests and diseases accounting for losses of 2.7% and 4.7% respectively. However, there were significant location-specific differences in weekly trap catch averages and in seasonal trap catch patterns. Trap catches ranged from averages of 475 and 584 weevils/week in the villages of Bendunganjati and Turi to 254 and 46 weevils/week in Ngargoyoso and Kradenan. The highest trap catches occurred at the highest sex pheromone loadings in all four locations. The effect of trap density on average weekly trap catch depended on location, with no significant effect of trap density on trap catch when the data from all locations were pooled. There was no statistically significant impact of sex pheromone traps on losses from sweetpotato weevil, although fields with blank lures had consistently higher levels of sweetpotato weevil damage. The highest trap catches occurred in Turi, which also had the highest levels of weevil damage. The use of sex pheromone traps led to damage reduction, even when weevil pressure and damage levels were low, as in the village of Kradenan. This suggests that there is potential for traps to play a role in reducing weevil damage in situations of higher weevil pressure.
Keyword Cylas formicarius
Indonesia
Sex pheromone
Sweetpotato weevil
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
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Created: Thu, 30 Jun 2016, 01:37:03 EST by Anthony Yeates