Abstract
Current phytotoxicity plant test protocols for US pesticide registration require testing for effects on seedling emergence and early growth without regard to other important factors, such as plant reproduction. Yield and quality reduction can have significant economic and ecological effects. Therefore, field trials were conducted to determine if potato (Solanum tubersum L.) vegetative growth and tuber yield and quality were affected by herbicides at below recommended field rates. Potatoes were grown in fields at the Oregon State University Horticulture Farm with herbicides applied at below recommended field application rates 14 d after emergence (DAE) or at 28 DAE. Plant height was measured before and 14 d after application. Visual foliar injury was rated 14 d after application, and tuber yield and quality parameters were measured at harvest (120 DAE). Some tubers were grown in the greenhouse the following year to determine if there were carry-over effects. Potato vegetation and tuber yield quality were generally more affected by herbicides applied at 14 DAE than at 28 DAE. Tuber yield and quality parameters were more affected by lower herbicide rates than were plant height or injury. There were significant yield losses caused by low rates of sulfometuron methyl and imazapyr and, to a lesser extent, with glyphosate and cloransulam-methyl. Bromoxynil and MCPA ((4-chloro-2-methylphenoxy)acetic) acid had little effect on the plants. Vegetative responses did not accurately predict yield and quality responses of tubers; therefore, reproductive responses should be considered in phytotoxicity test protocols for pesticide registration in the USA.
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Claims 10
Claim · model-written summary
Potato vegetation and tuber yield quality were more affected by herbicides at 14 than 28 days after emergence.
- Taxon
- Potato
Solanum tuberosume0 - Treatment
- herbicides applied at 14 DAEe0
- Outcome
- Potato vegetation and tuber yield qualitye0
- Direction
- more affectede0
- Comparator
- 28 DAEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato vegetation and tuber yield quality were generally more affected by herbicides applied at 14 DAE than at 28 DAE.”
Claim · model-written summary
Lower herbicide rates affected tuber yield and quality more than plant height or injury.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- lower herbicide ratese0
- Outcome
- Tuber yield and quality parameterse0
- Direction
- more affectede0
- Comparator
- plant height or injurye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuber yield and quality parameters were more affected by lower herbicide rates than were plant height or injury.”
t0“Potatoes”
Claim · model-written summary
Low sulfometuron methyl rates caused significant potato yield loss.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- low rates of sulfometuron methyle0
- Outcome
- yield lossese0
- Direction
- lossese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant yield losses caused by low rates of sulfometuron methyl and imazapyr and, to a lesser extent, with glyphosate and cloransulam-methyl.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
Low imazapyr rates caused significant potato yield loss.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- imazapyre0
- Outcome
- yield lossese0
- Direction
- lossese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant yield losses caused by low rates of sulfometuron methyl and imazapyr and, to a lesser extent, with glyphosate and cloransulam-methyl.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
Glyphosate caused potato yield loss to a lesser extent.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- glyphosatee0
- Outcome
- yield lossese0
- Direction
- lossese0
- Qualifier
- to a lesser extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant yield losses caused by low rates of sulfometuron methyl and imazapyr and, to a lesser extent, with glyphosate and cloransulam-methyl.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
Cloransulam-methyl caused potato yield loss to a lesser extent.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- cloransulam-methyle0
- Outcome
- yield lossese0
- Direction
- lossese0
- Qualifier
- to a lesser extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant yield losses caused by low rates of sulfometuron methyl and imazapyr and, to a lesser extent, with glyphosate and cloransulam-methyl.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
Bromoxynil had little effect on potato plants.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Bromoxynile0
- Outcome
- effect on the plantse0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bromoxynil and MCPA ((4-chloro-2-methylphenoxy)acetic) acid had little effect on the plants.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
MCPA had little effect on potato plants.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- MCPAe0
- Outcome
- effect on the plantse0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bromoxynil and MCPA ((4-chloro-2-methylphenoxy)acetic) acid had little effect on the plants.”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
Vegetative responses did not accurately predict tuber yield and quality responses.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- yield and quality responses of tuberse0
- Direction
- did not accurately predicte0
- Comparator
- Vegetative responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative responses did not accurately predict yield and quality responses of tubers”
t0“potato (Solanum tubersum L.)”
Claim · model-written summary
The authors recommend considering reproductive responses in US pesticide registration phytotoxicity tests.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- reproductive responses should be considered in phytotoxicity test protocolse0
- Setting
- USAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reproductive responses should be considered in phytotoxicity test protocols for pesticide registration in the USA.”
t0“potato (Solanum tubersum L.)”
The same questions in other papers
glyphosate · yield · Solanum tuberosum (potato)Results differ
7 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
8 papers more in this group
See all 12 papers →herbicide · quality: general · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.