Abstract
Cultural practices and insecticide treatments and combinations were evaluated for effect on tuber damage by potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) in the Columbia basin of eastern Oregon and Washington. A range of intervals between initial application of several insecticides and vine-kill were tested to determine how early to implement a program to control potato tuberworm tuber damage. Esfenvalerate, methamidophos, and methomyl were applied at recommended intervals, with programs beginning from 28 to 5 d before vine-kill. All insecticide treatments significantly reduced tuber damage compared with the untreated control, but there was no apparent advantage to beginning control efforts earlier than later in the season. Esfenvalerate and indoxacarb at two rates and a combination of the two insecticides were applied weekly beginning 4 wk before and at vine-kill, and indoxacarb was applied at and 1 wk postvine-kill as chemigation treatments. Application of insecticides at and after vine-kill also reduced tuberworm infestation. 'Russet Norkotah' and 'Russet Burbank' plants were allowed to naturally senesce or were chemically defoliated. They received either no irrigation or were irrigated by center-pivot with 0.25 cm water daily from vine-kill until harvest 2 wk later. Daily irrigation after vine-kill reduced tuber damage, and chemical vine-kill tended to reduce tuber damage compared with natural senescence. Covering hills with soil provides good protection but must be done by vine-kill. Data from these trials indicate that the most critical time for initiation of control methods is immediately before and at vine-kill.
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Claims 7
Claim · model-written summary
Insecticide treatments significantly reduced tuber damage versus untreated controls.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- insecticide treatmentse0
- Interactor
- Potato Tuberworm
Phthorimaea operculellat0pest - Outcome
- tuber damagee0
- Direction
- reducede0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All insecticide treatments significantly reduced tuber damage compared with the untreated control”
t0“Potato Tuberworm”
Claim · model-written summary
Earlier insecticide control had no apparent advantage over later control.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- beginning control efforts earliere0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- advantagee0
- Direction
- no apparent advantagee0
- Comparator
- later in the seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no apparent advantage to beginning control efforts earlier than later in the season”
t0“Potato Tuberworm”
Claim · model-written summary
Insecticide applications at and after vine-kill reduced tuberworm infestation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Application of insecticides at and after vine-kille0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- tuberworm infestatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of insecticides at and after vine-kill also reduced tuberworm infestation”
t0“Potato Tuberworm”
Claim · model-written summary
Daily irrigation after vine-kill reduced potato tuber damage.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Daily irrigation after vine-kille0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- tuber damagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Daily irrigation after vine-kill reduced tuber damage”
t0“Potato Tuberworm”
Claim · model-written summary
Chemical vine-kill tended to reduce tuber damage compared with natural senescence.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- chemical vine-kille0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- tuber damagee0
- Direction
- reducee0
- Comparator
- natural senescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chemical vine-kill tended to reduce tuber damage compared with natural senescence”
t0“Potato Tuberworm”
Claim · model-written summary
Soil covering of hills provided good protection when completed by vine-kill.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Covering hills with soile0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- good protectione0
- Qualifier
- by vine-kille0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Covering hills with soil provides good protection but must be done by vine-kill”
t0“Potato Tuberworm”
Claim · model-written summary
The authors identify immediately before and at vine-kill as the critical time to begin control.
- Taxon
- PotatoSolanum tuberosumt0
- Interactor
- Potato TuberwormPhthorimaea operculellat0pest
- Outcome
- initiation of control methods is immediately before and at vine-kille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most critical time for initiation of control methods is immediately before and at vine-kill”
t0“Potato Tuberworm”
The same questions in other papers
insecticide · Phthorimaea operculella · Solanum tuberosum (potato)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.