Abstract
Summary: Growth chamber studies were conducted to investigate the effects of alachor (2‐choloro‐2′,6′‐diethyl‐N‐ (methoxymethyl) acetanilide) on emerging seedlings of maize (Zea mays L.) planted 2.5 and 8.0 cm deep in a Plano silt loam soil. Alachlor was localized in the shoot zone, in the root zone, and in the shoot and root zones. Four days after emergence, seedlings were harvested and total shoot and root lengths used as measures of herbicidal effectiveness. The herbicide applied at a rate of 2.5 kg/ha caused a severe reduction in seedling height when placed in the shoot zone of seeds planted at the shallow depth. This injury was prevented when seeds were planted at the deeper level. When alachlor was placed in the root zone, there was no inhibition of shoot growth. When both shoot and root zones were exposed to the herbicide, severe growth inhibition again occurred. Roots were less sensitive to alachlor. A simple technique involving use of sand and activated charcoal barriers to effectively separate the shoot and root zones is described.
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Claims 6
Claim · model-written summary
Alachlor in the shoot zone severely reduced seedling height when seed was shallow-planted.
- Treatment
- herbicide applied at a rate of 2.5 kg/hae0
- Outcome
- seedling heighte0
- Direction
- reductione0
- Qualifier
- shoot zone of seeds planted at the shallow depthe0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The herbicide applied at a rate of 2.5 kg/ha caused a severe reduction in seedling height when placed in the shoot zone of seeds planted at the shallow depth”
t0“maize (Zea mays L.)”
Claim · model-written summary
Deeper planting prevented alachlor injury.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This injury was prevented when seeds were planted at the deeper level”
t0“maize (Zea mays L.)”
Claim · model-written summary
Root-zone alachlor did not inhibit shoot growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When alachlor was placed in the root zone, there was no inhibition of shoot growth”
t0“maize (Zea mays L.)”
Claim · model-written summary
Exposing both shoot and root zones to alachlor severely inhibited growth.
- Treatment
- both shoot and root zones were exposed to the herbicidee0
- Outcome
- growth inhibitione0
- Direction
- severee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both shoot and root zones were exposed to the herbicide, severe growth inhibition again occurred”
t0“maize (Zea mays L.)”
Claim · model-written summary
Maize roots were less sensitive to alachlor.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots were less sensitive to alachlor”
t0“maize (Zea mays L.)”
Claim · model-written summary
Sand and activated charcoal barriers effectively separated shoot and root zones.
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A simple technique involving use of sand and activated charcoal barriers to effectively separate the shoot and root zones is described”
t0“maize (Zea mays L.)”
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