Recognition of Instars and Adult Trap Catches of Cosmopolites sordidus (Coleoptera: Curculionidae) from Plantains in Puerto Rico

On the basis of head capsule widths of field-collected larvae, Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) was found to have five instars. Mean head capsule widths were 0.44, 0.71, 1.04, 1.48, and 1.85 mm for the first to fifth instars, respectively. The greatest growth ratio was reco...

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Bibliographic Details
Published in:Annals of the Entomological Society of America 2006-09, Vol.99 (5), p.875-878
Main Authors: Pantoja, Alberto, Salazar, Amparo, Macchiavelli, Raúl
Format: Article
Language:English
Subjects:
adult insects
ARTHROPOD BIOLOGY
Biological and medical sciences
body measurements
Coleoptera
Cosmopolites sordidus
Curculionidae
Fundamental and applied biological sciences. Psychology
head capsule width
head capsules width
insect morphology
insect traps
Insecta
instar number
instars
Invertebrates
larvae
Musa paradisiaca
pest monitoring
plantains
population density
population dynamics
precipitation
Systematics. Geographical distribution
trapping
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Summary:On the basis of head capsule widths of field-collected larvae, Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) was found to have five instars. Mean head capsule widths were 0.44, 0.71, 1.04, 1.48, and 1.85 mm for the first to fifth instars, respectively. The greatest growth ratio was recorded between the first and second instar. Adult C. sordidus densities reached a peak in January with 2.4 adults per trap, and the lowest density recorded was during April with 0.7 adults per trap. Adult captures seems to be influenced by precipitation with higher captures after precipitation events.
ISSN:0013-8746
1938-2901
0013-8746
DOI:10.1603/0013-8746(2006)99[875:ROIAAT]2.0.CO;2