Within-Vine Distribution and Damage of Sweetpotato Weevil, Cylas formicarius elegantulus (Coleoptera: Curculionidae), on Four Cultivars of Sweet Potato in Southern Florida

1987 ◽  
Vol 70 (4) ◽  
pp. 523 ◽  
Author(s):  
R. K. Jansson ◽  
H. H. Bryan ◽  
K. A. Sorensen
Keyword(s):  
Sweet Potato ◽  
Sweetpotato Weevil ◽  
Cylas Formicarius ◽  
Cylas Formicarius Elegantulus ◽  
Southern Florida

RESISTANCE IN SWEET POTATOES TO THE SWEETPOTATO WEEVIL, CYLAS FORMICARIUS ELEGANTULUS (SUMMERS)1

1985 ◽  
Vol 20 (3) ◽  
pp. 345-350 ◽  
Author(s):  
Michael A. Mullen ◽  
Alfred Jones ◽  
Donald R. Paterson ◽  
Thurman E. Boswell
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
The Other ◽  
Sweet Potatoes ◽  
Sweetpotato Weevil ◽  
The Past ◽  
Cylas Formicarius ◽  
Cylas Formicarius Elegantulus

Fourteen sweet potato [Ipomoea batatas (L.) Lam] cultivars and varieties were examined for resistance to the sweetpotato weevil [Cylas formicarius elegantulus (Summers)] in artificially infested fields in Yoakum, TX. One cultivar W-226, appeared to have a greater level of resistance than the other cultivars examined. The data are compared to earlier resistance trials to show that the germplasm presently available has greater levels of resistance than that in previous years. The resistance levels of “Resisto” and “Regal” for the past 4 years are discussed.

Acoustical Detection of the Sweetpotato Weevil (Coleoptera: Curculionidae) in Sweet Potato2

1993 ◽  
Vol 28 (4) ◽  
pp. 453-461
Author(s):  
James D. Hansen
Keyword(s):  
Mathematical Models ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Observation Data ◽  
Substantial Variation ◽  
Sweet Potatoes ◽  
Sweetpotato Weevil ◽  
Cylas Formicarius ◽  
Cylas Formicarius Elegantulus ◽  
Observation Period

Ultrasensitive acoustical equipment was used to detect larvae of the sweetpotato weevil, Cylas formicarius elegantulus (Summers) (Coleoptera: Curculionidae), in the sweet potato, Ipomoea batatas (L.). Methods of expressing results were evaluated with per cent audible as the best indicator of larval presence. Sound from moderately infested sweet potatoes (8 to 20 weevils/sweet potato) varied considerably even though infestation rates above 60 weevils/sweet potato resulted in sound throughout most of the observation period. Infested sweet potatoes were detectable after two weeks of weevil development; maximum values were observed a month after infestation. However, the substantial variation of the observation data precluded descriptive mathematical models based on infestation rate or weevil development. Disease processes also caused signals that were indistinguishable from those made by sweetpotato larvae. Other factors that influence detectability are also discussed.

Host preference of sweetpotato weevil, Cylas formicarius elegantulus (Summers): an example of Hopkins’ host-selection principle

2019 ◽  
Vol 13 (5) ◽  
pp. 779-786
Author(s):  
Jie Chen ◽  
Michael J. Stout ◽  
Julien Beuzelin ◽  
Tara P. Smith ◽  
Don LaBonte ◽  
...  
Keyword(s):  
Host Selection ◽  
Host Preference ◽  
Selection Principle ◽  
Sweetpotato Weevil ◽  
Cylas Formicarius ◽  
Cylas Formicarius Elegantulus

Feeding by adult sweet potato weevils, Cylas formicarius elegantulus, on sweet potato leaves

1988 ◽  
Vol 48 (2) ◽  
pp. 157-163 ◽  
Author(s):  
S. F. Nottingham ◽  
K.-C. Son ◽  
D. D. Wilson ◽  
R. F. Severson ◽  
S. J. Kays
Keyword(s):  
Sweet Potato ◽  
Cylas Formicarius ◽  
Cylas Formicarius Elegantulus ◽  
Sweet Potato Leaves

Lepidopterous leafminers on sweet potato in Fiji

1963 ◽  
Vol 53 (4) ◽  
pp. 665-670 ◽  
Author(s):  
Alden D. Hinckley
Keyword(s):  
Sweet Potato ◽  
Abundant Species ◽  
Cylas Formicarius ◽  
Cultural Methods ◽  
Ant Predation ◽  
Cylas Formicarius Elegantulus ◽  
Euscepes Postfasciatus

Two Lepidopterous leafminers have been observed on sweet potato at Koronivia, Fiji. The Gracillariid Acrocercops prosacta Meyr. is the more abundant species in most areas but populations of a Lyonetiid, Bedellia ipomoeae Bradley, reach damaging levels in fields sprayed with dieldrin for control of weevils (Cylas formicarius elegantulus (Summers) and Euscepes postfasciatus (Fairm.)). Such treatment is shown to reduce parasitisation of B. ipomoeae by a species of Apanteles near A. tapatapaoanus Fullaway and of A. prosacta, by another Braconid, a species of Mesocoelus near M. acrocercopsis Mues. However, outbreaks of B. ipomoeae could not be attributed to such reduction. Elimination of ant predation by the dieldrin sprays was more likely to have initiated the outbreaks.Sprays containing malathion, diazinon, or dieldrin killed larvae, but not pupae, of B. ipomoeae. Outbreaks of B. ipomoeae can probably be prevented by relying on cultural methods to control weevils or by intensifying insecticide applications to control both B. ipomoeae and the weevils.

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