Abstract
Abstract: An on‐farm study to evaluate the effect of pheromone trap density on the population of the banana weevil, Cosmopolites sordidus (Germar) (Col., Curculionidae) was conducted in Masaka district, Uganda. The pheromone used was Cosmolure+, a commercially available weevil aggregation pheromone. Forty‐two farms were assigned to one of three treatments: 0, 4 and 8 pheromone traps/ha. Pheromone lures were changed monthly at which time the traps were moved to a different location within the stand. Adult weevil population densities were estimated by using mark and recapture methodology at 0, 6, 12, 18 and 21 months, while damage to the banana corm was assessed at 0, 3, 6, 12, 18 and 21 months since the start of the experiment. Pheromone trap captures were generally low: about 10 weevils per trap per month. There were no significant differences in mean catches of C. sordidus per trap per month except for February 2002 when doubling the pheromone trap density decreased weevil catches. Although not significant, decreased efficiency was also the trend in higher trap densities over all the data sets. Doubling the number of traps increased the number of weevils caught per hectare per month from 0.4 to 0.6%. There was no significant difference in plant damage between the pheromone treatments in low‐ compared with high‐trap densities. There were generally no significant differences in weevil populations and plant damage between pheromone‐treated and control farms. Possible reasons for the low‐trap efficacy in this study are discussed.
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Claims 4
Claim · model-written summary
Pheromone trap captures of Cosmopolites sordidus were generally low, about 10 weevils per trap per month.
- Taxon
- bananat0
- Interactor
- Cosmopolites sordidus
Cosmopolites sordidust0pest - Outcome
- Pheromone trap capturese1
- Value
- about 10 weevils per trap per monthe1
- Qualifier
- generally lowe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“banana weevil, Cosmopolites sordidus”
e1“Pheromone trap captures were generally low: about 10 weevils per trap per month”
Claim · model-written summary
Doubling the pheromone trap density decreased C. sordidus catches in February 2002.
- Taxon
- bananat0
- Treatment
- doubling the pheromone trap densitye2
- Interactor
- C. sordidusCosmopolites sordiduse2pest
- Outcome
- weevil catchese2
- Direction
- decreasede2
- Qualifier
- February 2002e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“banana weevil, Cosmopolites sordidus”
e2“There were no significant differences in mean catches of C. sordidus per trap per month except for February 2002 when doubling the pheromone trap density decreased weevil catches”
Claim · model-written summary
Higher pheromone trap densities showed a non-significant trend toward decreased trap efficiency.
Not reportedComparator
Verbatim
t0“banana weevil, Cosmopolites sordidus”
e3“Although not significant, decreased efficiency was also the trend in higher trap densities over all the data sets”
Claim · model-written summary
Doubling the number of traps increased weevils caught per hectare per month from 0.4 to 0.6%.
- Taxon
- bananat0
- Treatment
- Doubling the number of trapse4
- Interactor
- Cosmopolites sordidusCosmopolites sordidust0pest
- Outcome
- number of weevils caught per hectare per monthe4
- Direction
- increasede4
- Value
- from 0.4 to 0.6%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“banana weevil, Cosmopolites sordidus”
e4“Doubling the number of traps increased the number of weevils caught per hectare per month from 0.4 to 0.6%”
The same questions in other papers
pheromone · Cosmopolites sordidus · MusaPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- no effect
trap barrier · Cosmopolites sordidus · MusaPositive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.