Abstract
Abstract Sporadic and unpredictable rain events can reduce agrichemical efficacy if a sufficient rain‐free period is not reached following application. Mepiquat chloride (MC) is used to regulate vegetative growth in cotton ( Gossypium spp .), and the rain‐free period, according to the label, is 8 h or reduced to 4 h when applied with a surfactant. Experiments were conducted in 2021–2022 to evaluate the effect of MC treatment and dry time between application and a simulated rainfall event on cotton growth following application. The MC treatments were applied during the second week of squaring and were washed from the surface of the leaves 0, 2, 4, and 8 h after application using a center pivot irrigation system that delivered 0.4–0.6 inches of simulated rainfall. All MC treatments, averaged across dry time, slowed cotton growth regardless of surfactant or rate applied. Dry time demonstrated similar results, with dry times ≥2 h slowing growth. However, when cotton growth over time was evaluated, it was determined that in situations where cotton growth is more aggressive, reapplication of MC was necessary sooner where the initial application was removed from the surface of the leaf 0–2 h after application compared to 4–8 h after application. Adding a surfactant to MC applications did not reduce the rain‐free period, and when at least 4 h of dry time was achieved, MC applications were just as effective as an 8 h dry time, even when cotton growth was aggressive.
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Claims 5
Claim · model-written summary
Mepiquat chloride treatments slowed cotton growth across surfactant and rate conditions.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- MC treatmentse0
- Outcome
- cotton growthe0
- Direction
- slowede0
- Qualifier
- averaged across dry timee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All MC treatments, averaged across dry time, slowed cotton growth regardless of surfactant or rate applied.”
Claim · model-written summary
Dry times of at least 2 h slowed cotton growth.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- dry times ≥2 he0
- Outcome
- growthe0
- Direction
- slowinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry time demonstrated similar results, with dry times ≥2 h slowing growth.”
t0“cotton ( Gossypium spp .)”
Claim · model-written summary
Under aggressive growth, cotton required earlier MC reapplication after 0–2 h than after 4–8 h before wash-off.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 0–2 h after applicatione0
- Outcome
- reapplication of MCe0
- Direction
- soonere0
- Qualifier
- cotton growth is more aggressivee0
- Comparator
- 4–8 h after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in situations where cotton growth is more aggressive, reapplication of MC was necessary sooner where the initial application was removed from the surface of the leaf 0–2 h after application compared to 4–8 h after application”
Claim · model-written summary
Adding surfactant did not shorten the MC rain-free period.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Adding a surfactant to MC applicationse0
- Outcome
- rain‐free periode0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding a surfactant to MC applications did not reduce the rain‐free period”
t0“cotton ( Gossypium spp .)”
Claim · model-written summary
MC after at least 4 h of dry time was as effective as after 8 h, including during aggressive cotton growth.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- at least 4 h of dry timee0
- Outcome
- MC applicationse0
- Direction
- just as effectivee0
- Qualifier
- even when cotton growth was aggressivee0
- Comparator
- 8 h dry timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when at least 4 h of dry time was achieved, MC applications were just as effective as an 8 h dry time, even when cotton growth was aggressive”
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See all 51 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.