Abstract
The biology and behavior of the longhorned beetle Dectes texanus LeConte (Coleoptera: Cerambycidae) was studied on two host plants that suffer economic losses from this pest; sunflower, Helianthus annuus, and soybean, Glycines max. Reciprocal crosses of D. texanus collected from the two plants all produced viable progeny, indicating that conspecific insects attack both crops. Pupae from soybean stalks weighed about 40% less than those from sunflower, and adults fed on soybean lived a mean of 23 days, compared to a mean of 53 days (males) and 76 days (females) for those fed sunflower. A female's larval host plant had no effect on her tendency to ovipuncture plants of either type in a greenhouse trial. A field-tested population collected exclusively from sunflower contained three types of females in similar proportions: those that laid eggs only on sunflower, those that laid only on soybean, and those that laid equally on both host plants. Females in field trials fed more on the plant they had fed on in the laboratory, but soybean-fed females fed more on soybean than did sunflower-fed females. Females fed soybean also made more ovipunctures on soybean plants in field trials than sunflower-fed females, but their responses to sunflower plants were similar. Females displayed higher total ovipositional activity when they encountered sunflower first in the field, and lower total activity when they encountered soybean first. Feeding scores were significantly correlated with ovipunctures and eggs on both plant types. We conclude that sunflower is the preferred host plant, although females will accept soybean when it is the only available food. The results suggest that D. texanus is still in the initial stages of a host range expansion with female host selection behavior demonstrating both genetic influences and phenotypic flexibility. Sunflower represents a nutritionally superior, ancestral host plant and relatively high fitness costs are still associated with utilization of the novel host plant, soybean, costs that may be offset by benefits such as reduced intraspecific competition. These potential benefits and their consequent implications for D. texanus host range evolution are hypothesized and discussed.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 16
Claim · model-written summary
Reciprocal crosses of D. texanus from the two host plants all produced viable progeny on sunflower.
- Taxon
- sunflower
Helianthus annuuse0 - Interactor
- D. texanus
Dectes texanuse1pest - Outcome
- viable progenye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower, Helianthus annuus, and soybean, Glycines max”
e1“Reciprocal crosses of D. texanus collected from the two plants all produced viable progeny”
Claim · model-written summary
Pupae from soybean stalks weighed about 40% less than pupae from sunflower.
- Taxon
- soybean
Glycine maxe2 - Treatment
- soybean stalkse2
- Outcome
- weighede2
- Direction
- lesse2
- Value
- about 40%e2
- Comparator
- sunflowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Pupae from soybean stalks weighed about 40% less than those from sunflower”
Claim · model-written summary
Adults fed on soybean lived a mean of 23 days, lower than the 53 days of sunflower-fed males.
- Taxon
- soybeanGlycine maxe3
- Treatment
- fed on soybeane3
- Outcome
- livede3
- Direction
- lowerinferrede3
- Value
- 23 dayse3
- Qualifier
- malese3
- Comparator
- sunflowere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“adults fed on soybean lived a mean of 23 days, compared to a mean of 53 days (males) and 76 days (females) for those fed sunflower”
Claim · model-written summary
Adults fed on soybean lived a mean of 23 days, lower than the 76 days of sunflower-fed females.
- Taxon
- soybeanGlycine maxe3
- Treatment
- fed on soybeane3
- Outcome
- livede3
- Direction
- lowerinferrede3
- Value
- 76 dayse3
- Qualifier
- femalese3
- Comparator
- sunflowere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“adults fed on soybean lived a mean of 23 days, compared to a mean of 53 days (males) and 76 days (females) for those fed sunflower”
Claim · model-written summary
The female larval host plant had no effect on the tendency to ovipuncture plants in a greenhouse trial.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- A female's larval host plante4
- Outcome
- tendency to ovipuncture plantse4
- Direction
- no effecte4
- Setting
- greenhouse triale4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower, Helianthus annuus, and soybean, Glycines max”
e4“A female's larval host plant had no effect on her tendency to ovipuncture plants of either type in a greenhouse trial”
Claim · model-written summary
A field-tested population collected from sunflower contained three types of females in similar proportions: laying on sunflower only, on soybean only, or on both.
- Taxon
- sunflowerHelianthus annuuse5
- Outcome
- three types of femalese5
- Qualifier
- in similar proportionse5
- Setting
- field-testede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“A field-tested population collected exclusively from sunflower contained three types of females in similar proportions”
Claim · model-written summary
In field trials, females fed more on the plant they had fed on in the laboratory.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- the plant they had fed on in the laboratorye6
- Outcome
- fede6
- Direction
- moree6
- Setting
- in field trialse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower, Helianthus annuus, and soybean, Glycines max”
e6“Females in field trials fed more on the plant they had fed on in the laboratory”
Claim · model-written summary
Soybean-fed females fed more on soybean in field trials than sunflower-fed females did.
- Taxon
- soybeanGlycine maxe7
- Treatment
- soybean-fede7
- Outcome
- fede7
- Direction
- moree7
- Comparator
- sunflower-fed femalese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“soybean-fed females fed more on soybean than did sunflower-fed females”
Claim · model-written summary
Females fed soybean made more ovipunctures on soybean plants in field trials than sunflower-fed females.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Females fed soybeane0
- Outcome
- ovipuncturese0
- Direction
- moree0
- Comparator
- sunflower-fed femalese0
- Setting
- in field trialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Females fed soybean also made more ovipunctures on soybean plants in field trials than sunflower-fed females”
Claim · model-written summary
Females fed soybean responded to sunflower plants similarly to sunflower-fed females.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- Females fed soybeane0
- Outcome
- responsese1
- Direction
- no_changeinferrede1
- Comparator
- sunflower-fed femalese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Females fed soybean also made more ovipunctures on soybean plants in field trials than sunflower-fed females”
e1“their responses to sunflower plants were similar”
Claim · model-written summary
Females encountering sunflower first in the field showed higher total ovipositional activity than when they encountered soybean first.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- encountered sunflower firste0
- Outcome
- total ovipositional activitye0
- Direction
- highere0
- Comparator
- encountered soybean firste1
- Setting
- in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Females displayed higher total ovipositional activity when they encountered sunflower first in the field”
e1“lower total activity when they encountered soybean first”
Claim · model-written summary
Females encountering soybean first showed lower total activity than when they encountered sunflower first.
- Taxon
- soybeanGlycine maxe1
- Treatment
- encountered soybean firste1
- Outcome
- total activitye1
- Direction
- lowere1
- Comparator
- encountered sunflower firste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Females displayed higher total ovipositional activity when they encountered sunflower first in the field”
e1“lower total activity when they encountered soybean first”
Claim · model-written summary
Feeding scores were significantly correlated with ovipunctures and eggs on both host plant types.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Feeding scorese1
- Outcome
- ovipunctures and eggse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower, Helianthus annuus, and soybean, Glycines max”
e1“Feeding scores were significantly correlated with ovipunctures and eggs on both plant types”
Claim · model-written summary
The authors conclude that sunflower is the preferred host plant, while females will accept soybean when it is the only available food.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- preferred host plante0
- Qualifier
- although females will accept soybean when it is the only available foode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that sunflower is the preferred host plant, although females will accept soybean when it is the only available food”
Claim · model-written summary
Relatively high fitness costs are still associated with use of soybean as a novel host.
- Taxon
- soybeanGlycine maxe0
- Outcome
- fitness costse0
- Qualifier
- relatively highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relatively high fitness costs are still associated with utilization of the novel host plant, soybean”
Claim · model-written summary
D. texanus is still in the initial stages of a host range expansion onto soybean.
- Taxon
- soybeanGlycine maxe0
- Interactor
- D. texanusDectes texanuse1pest
- Outcome
- host range expansione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relatively high fitness costs are still associated with utilization of the novel host plant, soybean”
e1“The results suggest that D. texanus is still in the initial stages of a host range expansion”