Abstract
Abstract Experiments in the North and Atlantic Coastal areas of Honduras determined the critical period of competition of Rottboellia exaltata (itchgrass) with maize, and established cultural and chemical methods for control. The critical period of competition lies between 30 and 45 d after planting; plots should be kept weed free during this period to avoid significant reduction in yield. Unweeded R. exaltata reduced maize yield by about 80%. Among control treatments, a combination of atrazine and pen‐dimethalin at 1–2 and 1–3 kg a.i./ha gave the highest yield. Supplementary post‐emergence control by hoeing or using paraquat could help attain yields comparable to those obtained in the plots kept weed free throughout the growing period.
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Claims 4
Claim · model-written summary
The critical itchgrass competition period in maize was 30 to 45 days after planting.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“itchgrass(rottboellia exaltata)in maize”
e0“The critical period of competition lies between 30 and 45 d after planting; plots should be kept weed free during this period to avoid significant reduction in yield.”
Claim · model-written summary
Unweeded itchgrass reduced maize yield by about 80%.
- Treatment
- Unweeded R. exaltatae0
- Interactor
- R. exaltataOphiuros exaltatuse0weed
- Outcome
- maize yielde0
- Direction
- reducede0
- Value
- about 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“itchgrass(rottboellia exaltata)in maize”
e0“Unweeded R. exaltata reduced maize yield by about 80%.”
Claim · model-written summary
Atrazine and pendimethalin together produced the highest maize yield among control treatments.
- Treatment
- a combination of atrazine and pen‐dimethalin at 1–2 and 1–3 kg a.i./hae0
- Interactor
- itchgrasst0weed
- Outcome
- yielde0
- Direction
- higheste0
- Comparator
- control treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“itchgrass(rottboellia exaltata)in maize”
e0“Among control treatments, a combination of atrazine and pen‐dimethalin at 1–2 and 1–3 kg a.i./ha gave the highest yield.”
Claim · model-written summary
Supplementary hoeing or paraquat could attain yields comparable with season long weed free plots.
- Treatment
- Supplementary post‐emergence control by hoeing or using paraquate0
- Outcome
- yieldse0
- Direction
- comparablee0
- Comparator
- plots kept weed free throughout the growing periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Supplementary post‐emergence control by hoeing or using paraquat could help attain yields comparable to those obtained in the plots kept weed free throughout the growing period.”
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