Abstract
Damage by Cerotoma arcuata Olivier to Phaseolus vulgaris L. grown in the greenhouse was evaluated. In 1 experiment, the addition of 2 or 4 pairs of adult C. arcuata at the 1st or 2nd trifoliate growth stage resulted in ≈50% losses in seed yields. By using physical barriers in a 2nd experiment, the effect of adult feeding on leaves was separated from the effect of larval feeding on nodules and root in the soil. When C. ancuata larvae were given access to roots and nodules, 2 pairs of adults were sufficient to decrease the numbers, dry weights and activity of the nodules formed, causing a reduction in yield. There was no decrease in nodulation or yield when access of larvae to the nodules was impeded. The decrease in N2 fixation caused by consumption of nodules by C. arcuata larvae was more deleterious to plant growth and yield than the defoliation imposed by the adults.
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Claims 5
Claim · model-written summary
Adult C. arcuata caused about 50% seed yield loss.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarist0 - Treatment
- addition of 2 or 4 pairs of adult C. arcuatae0
- Interactor
- C. arcuataCerotoma arcuatae0pest
- Outcome
- seed yieldse0
- Direction
- lossese0
- Value
- ≈50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“the addition of 2 or 4 pairs of adult C. arcuata at the 1st or 2nd trifoliate growth stage resulted in ≈50% losses in seed yields”
Claim · model-written summary
Larval root and nodule access decreased nodule number, dry weight and activity.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- C. ancuata larvae were given access to roots and nodulese0
- Outcome
- numbers, dry weights and activity of the nodulese0
- Direction
- decreasee0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“When C. ancuata larvae were given access to roots and nodules, 2 pairs of adults were sufficient to decrease the numbers, dry weights and activity of the nodules formed, causing a reduction in yield.”
Claim · model-written summary
Larval access reduced yield.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- C. ancuata larvae were given access to roots and nodulese0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“When C. ancuata larvae were given access to roots and nodules, 2 pairs of adults were sufficient to decrease the numbers, dry weights and activity of the nodules formed, causing a reduction in yield.”
Claim · model-written summary
Blocking larval access prevented a decline in nodulation and yield.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- access of larvae to the nodules was impedede0
- Outcome
- nodulation or yielde0
- Direction
- no decreasee0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“There was no decrease in nodulation or yield when access of larvae to the nodules was impeded.”
Claim · model-written summary
Larval nodule consumption harmed growth and yield more than adult defoliation.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- consumption of nodules by C. arcuata larvaee0
- Interactor
- C. arcuataCerotoma arcuatae0pest
- Outcome
- plant growth and yielde0
- Direction
- more deleteriouse0
- Comparator
- defoliation imposed by the adultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“The decrease in N2 fixation caused by consumption of nodules by C. arcuata larvae was more deleterious to plant growth and yield than the defoliation imposed by the adults.”